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satancopilotsmytardis · 5 months ago

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(Getting) Better Together

Pairing: Shigadabi

Rating: Explicit

Summary: Commissioned by an anonymous user. Dabi did not know that he was an omega, and he can’t say that he ever really wanted to find out that he was. He just wanted to join the League of Villains and destroy his father. But when the League’s doctor refused to clear him for active duty, he really thought the next step would be getting kicked out. He didn’t think that he would suddenly have the guy who tried to kill him trying to help him through this entire situation.

Contents: ABO, Alpha!Shigaraki, Omega!Dabi, Recovery from malnutrition/starvation, Mating Cycles, Heat/Ruts, Sex Ed, Discussions of past child and spousal abuse, Infertility, Sex Toys, Porn, Loss of Virginity/First Time, Anal Sex, Grinding, Cumming in Pants, Wet and Messy, Praise Kink, Creampie, Multiple Orgasms, Knots, Dabi has genital piercings, Shigaraki has a massive cock.

Word Count: 19249

Given that the new boss nearly killed him, Dabi really didn't think that the situation with the League of Villains would have anything over the usual jobs that he's done with other crews of criminals. But the next day, when he and Toga come back in after getting the few things they had kept at the safe house Giran had them held up in, Kurogiri informs them that they'll be living on the floor above the bar with Shigaraki. They each get a private, barely furnished room with a lock on the door, and they'll be able to buy whatever they want to decorate their space with the money that they're going to get for being on retainer, training, and running whatever small jobs the League has for them before they debut. They are also informed that there is a grocery list on the refrigerator and that as they need things, they can add it to that. On Wednesdays and Sundays they'll get a delivery of whatever they're missing. He's also not expecting them to be told that the League has a doctor on-call and that they will need to schedule a check-up with him over the course of the next week to ensure that they're healthy and that they have any medicine that they need as they get started in the organization. That's pretty strange.

But nothing is as strange as the doctor coming back into the examination room he's been sitting in for half an hour, and getting a somewhat bewildered look.

"What's up, doc?" He asks, not appreciating that he's somehow managed to be even more of a freak than he already is.

"I have the results from your test."

"What do I have, like seventy incurable diseases or something?" It would be his luck.

"No," but there is definitely something, given the tone. "You reported being a beta?"

"...yeah?"

"I have to inform you that your designation is actually that of an omega." Ujiko tells him, looking him dead in the eye. Dabi stares back.

"What?"

"It appears that you've had extended periods of malnutrition and are severely underweight for your height. Being in such a state, your body seems to have essentially 'turned off' all of the sex traits of your designation, allowing you to pass for a beta. You'll need to have another examination to determine the health of your reproductive system."

Dabi is so stunned that he doesn't even find the words to protest.

///

It's another hour and a half later when he is finished, feeling a little humiliated after the entire thing, though luckily a different doctor, someone else on AFO's payroll who is actually an expert in Omega anatomy took care of that, and they're in the room with he and Ujiko to determine what he needs to do going forward.

"Mr. Dabi--"

"Just 'Dabi'." He says numbly.

"Dabi," they correct, their voice gentle. "I am very sorry to inform you, but it appears that the damage sustained by your body from your burns as well as the extended period of malnutrition and high-stress has... rendered you infertile."

Oh. That's supposed to be a bad thing. Omegas are supposed to be all about having lots of pups. But Dabi feels some relief sweep through him for the first time since he got the news. "Okay, is that why I've never had a heat?"

"In part, maybe. But that is more likely to be related to the weight and malnutrition. We're going to prescribe some shakes that you can drink to help get your daily nutrients more readily, and we recommend you start eating a diet that is rich in fat and protein." The omega doctor gives him a pamphlet that outlines how he should be structuring his meals to ensure that he's putting on weight and Ujiko goes in for the kill,

"Until you gain ten kilos and have your first heat, I am not marking your chart as 'field ready'."

"What? But I've been fine. I can do my job! Just give me suppressants!"

"Not having your heat for so long is not 'fine'," The other doctor tells him, using that infuriatingly gentle tone again. "Extended stress like this can cause a whole host of severe medical issues that can dramatically shorten your lifespan." Like he doesn't already have a short one of those. "Now that you'll be getting the nutrition your body needs as well as having a safe place to sleep, you're going to start off by feeling much, much worse as your hormones begin to equalize." They keep talking for a while, loading Dabi up with about five more pamphlets for him to read and Dabi wonders if the League was really worth all the trouble it's turning out to be.

///

When he gets back to base that night, he goes straight to his room, and spreads out the pamphlets on his bed, trying to read through them all, but feeling like all of the information is just sort of slipping off of his brain from his shock. It takes until there's a soft knock on his door for him to realize that it must have been hours, that he skipped eating, which he's probably going to be in trouble for if AFO doesn't just decide that he's not worth the trouble of keeping around and throw him to the streets again.

He manages to get up and go to the door.

Shigaraki is standing on the other side, and yeah, it must be late, because he's not even wearing the hands anymore. "Here," Dabi looks down at his hands and finds a small box that claims to have a phone in it. "My number and Kurogiri's is already programed in. If you need a teleport, just text him and he'll open a portal."

"Oh. Thanks."

"...The doctor didn't clear you for missions." It's not a question. But the tone of it rings a bell in the back of Dabi's mind that, for as much as they're villains, means that Ujiko didn't tell Shigaraki why he wouldn't clear Dabi. "If you're using anything harder than weed, you shouldn't be here."

"I'm not on drugs." He says a little numbly. "I'm an omega."

He says the words half because he doesn't know if he believes them. Says them out loud himself and makes them horribly, achingly real.

Shigaraki blinks, and then frowns, his hand moving to scratch at his neck as Dabi just holds onto the phone box like somehow that will help him feel grounded from the mess of his emotions surging through him. "...If you're pregnant then this isn't a good place for you either. We're going to start a war, Dabi. This isn't a place to raise a pup if that's what you want." His voice isn't gentle like the other doctor's was. It's clinical. "If you need treatment as you decide what you want to do, we can provide that, but we won't be able to keep you here if you can't be active. I can speak to Giran, he might be able to take you in as a broker-in-training--"

"I'm not pregnant." Dabi tells him. "I didn't know." It sounds so pathetic when he admits it, and he doesn't know why he does. He tried to kill Shigaraki two days ago. He doesn't even like him.

There's another long pause, and then he hears Shigaraki take a slow breath. "Okay. Do you want me to come in?"

Dabi doesn't know what he wants, but he steps aside. Shigaraki closes the door softly behind him and sits on the crate that is serving as his desk, picking up some of the scattered pamphlets from the bed. Dabi manages to make his legs move so he can sit back down.

Shigaraki starts to read him the pamphlets, pausing to make Dabi repeat back the things he's read so he knows that Dabi is starting to pay attention.

///

He's going to be a mess. Once he comes out of the shock of learning his real designation, Dabi finally has that sink in. He is going to have his hormones flooding him all the time and because it's going to be the first time, it's likely that he's going to have such intense emotions that he's going to cry at the drop of a hat or get particularly vicious out of nowhere. He shouldn't be around any other omegas that he doesn't want to form an intense pack bond with, and he should be very, very careful about what alphas he associates with, because he's probably going to go back and forth from wanting to be mated to his brain turning completely off and able to be commanded without even needing a real order. None of the rest of the League are omegas though, so that's something. But Shigaraki, it turns out, is an alpha, along with Muscular, Magne, and Toga, though she's young enough that his body won't register her as a potential mate.

Shigaraki keeps him away from the other alphas, and offers to have Kurogiri be the one who brings their work back and forth if that will make him more comfortable. But Dabi hasn't told any of the others. As far as they know, his scars are the reason that he's not allowed to do field work right now, and he's been avoiding them, hoping they think he's got an infection or something so that they don't ask what's going on. But Shigaraki is the only other person he's told, and he doesn't know if he'll manage to figure out how the fuck to do this on his own if he has to.

Shigaraki, thankfully, doesn't say anything about that yet. They don't know when his first heat is going to hit, but he doesn't ask, or assume that he's going to be allowed to knot him like a toy-- use him the way that Enji used to use his mother. And Dabi keeps his mouth shut. He goes online and reads forums and websites that are dedicated to helping omegas through their cycles and people are constantly arguing back and forth about if a toy or a person is better to get them through their heats faster, but that's not the first thing he has to deal with.

No, the first hard thing that hits him through this transition is trying to eat.

It's so stupid, he has been half-starved and has eaten spoiled food, or even rotten food when things were really bad, so many times in his life, but having to put on the weight he's being asked to is hard. He is supposed to start his day with a nutrient dense protein shake that has a chalky flavor that is absolutely not 'vanilla' no matter what the bottle says it is, and is so thick and rich with fat it coats his tongue like there's a waxy film on it. He fucking hates it, and it's so much liquid that he feels like he's stuffed to the gills before he even starts the day. After the shake, he usually gets an hour or two of studying villain shit, apparently taking on some of Duster's administration work, of which there's a lot, because he can't go into the field. During this time, he's supposed to have another high protein snack, even though he's already full. Then he gets to go work out. Putting on muscle is a good way to get his body up to weight, and he has always liked training, so that isn't a hardship. It's just that afterwards he has to eat a full lunch that is also high in protein. In the afternoon he is supposed to finish anything that he didn't in the morning and have another snack. He usually finishes around mid-afternoon, and then he waits for dinner, alone in his room, makes himself eat again, and has to have one final snack before he gets to go to bed.

His isolation also means that all of these meals are taken in his bedroom, which now has a proper desk, a mini-fridge, microwave, and a hot plate. He can actually cook rudimentary things if he wants to, and he doesn't even have to wash the dishes, he just puts them in a bin that goes outside of his door so that Kurogiri or someone can take them downstairs to the dishwasher. But he can't bring himself to cook. He can't bring himself to do much of anything but the bare minimum, and that's not good enough. When he goes back to the doctor for another checkup, he's only gained .3 kilos at the end of the week which is lower than the average person who is on a refeeding treatment. At this rate it will take him far too long to get to a healthy weight, well after the League is supposed to debut in its new form. It takes about half an hour of him nearly pleading to get the goalpost moved. Seven kilos and one heat, if he can hit that and comes out of it not half-dead or having lost the weight again during the heat, then he'll be cleared for the summer camp job.

It doesn't feel like a victory though when he goes back to his room and has to sit alone inside of it, staring at the fridge full of food he doesn't want to eat and trying to hold back tears as he feels his body betraying him again.

There's a soft knock against the door and Dabi shuts the fridge and calls, "What, Duster?" Because Shigaraki is the only one who ever comes to see him now. He must want the files that he was reviewing. Potential recruits for the summer camp job, that he's not going to be able to go on unless he gets his shit together. There's a slight pause, but Shig opens the door. He's not expecting him to step inside, flinch, and then close the door swiftly behind him.

"Are you okay?"

He's really not expecting it when just that is enough to push him over the edge and have his seams aching as blood beads up under them. He made himself stop crying years ago. He thought that all of his tears got burned off with most of his skin on the mountain. But Shigaraki asks him one question, and he immediately bursts into the closest thing he has to tears.

"Shit, Dabi--" Shigaraki moves into his space, his hands reaching out towards him, and Dabi can't help it, he flinches back, sparks leaping up to his skin to defend himself. He knows that this is pathetic, that this isn't what Shigaraki thought he was signing up for when he brought him to this place. But he can't help it. That doesn't mean he's going to let the other kill him though. Shigaraki immediately takes a step back, holding up his hands, his smell starting to pulse out through the room. It's gentle and comforting, not at all the acrid angry smell that he'd been when he first tried to kill him, and that scent takes all of the fight back out of him as he sobs harder. "Can I touch you? I promise I'll be careful."

It takes him a second. He’s never wanted anyone in his personal space before, but he feels like he needs Shigaraki right now. He manages to cool his skin down, and lets out such a pitiful sound, a watery whine that he's never heard himself make. And then he gives a tiny nod. Shigaraki moves over to him and chuffs comfortingly, reaching with one hand, a finger curled into his palm, to wipe away the blood from his cheeks, and the other wraps around his shoulders as he pulls him into a hug. He keeps him close and it... feels so good for someone to comfort him. No one has done that since Natsuo, and as much as he loves his brother, even in his memories he wasn't great at it. He was young, they were both young. He shouldn't have put that on him.

It takes an age for him to stop crying, and when he does, Shigaraki just gets him to sit down on his bed, and Duster goes over to the bathroom and wets a washcloth before he joins him and starts to wipe the blood off of his cheeks. He does it so softly, but his seams are aching so badly from the wounds being freshly torn open. He waits until Dabi's face is all clean and he's just letting his shame saturate his body before he speaks again.

"Sorry... hormones, I guess."

"You don't have to apologize, Dabi. When your cycle is under control, you'll be back to normal and driving me absolutely insane again." Shigaraki sounds more patient than Dabi would have ever given him credit for before. "Your room reeked of distress before you started crying, do you want to tell me what's wrong? Did something happen during your check-up?"

"... I'm not gaining weight well enough, and I've already been struggling to eat as much as the doctor is telling me to." He admits softly. "This is a waste of time. I'll get my shit and go--"

"I think that's a bit premature, Dabi." Shigaraki tells him. "It's only been a week. If you're having a hard time with the meals, there are other things that we can try. What don't you like about them so far?"

It takes him a minute, but Dabi makes himself talk, and Shigaraki surprises him again by sitting there the entire time and listening.

///

The next morning Shigaraki comes into his room with his groceries on one arm. He splits Dabi's nutrient shake in half and makes him put half of it in a weird cup that he then puts in the freezer, and only has him drink the other as Shigaraki chops up an onion, a red pepper, chilis, and minces some garlic. He puts one of the pans on the little burner and moves to put the vegetables in, but Dabi steps in, not wanting to be completely babied and also--

"You can't cook them without putting something in the pan, they'll stick!"

"It's a non-stick pan."

"It's a shitty non-stick pan that looks like it's been hacked at with a machete for ten years. If you don't put something into it, they'll stick."

"Fine, you can help." He almost sounds smug when he says it, and Dabi wonders what the play is, other than making his room smell like onions. "Put a couple of spoonfuls of the Greek yogurt into a bowl with the garlic and season it with whatever you like on your eggs."

"What the fuck are you making?" Dabi asks, in utter confusion as Shigaraki opens a can of tomatoes which he hasn't ever used in a breakfast dish before, and once the other vegetables are sweating, pours the tomatoes in as well.

"It's a loose take on shakshuka, I used to have it when my teacher and I were in North Africa." He cooks them for a little while as Dabi goes ahead and adds the garlic to the yogurt and digs out a bottle of hot sauce that he got and puts in a couple of splashes of that along with some salt and pepper. When the liquid in the pan has reduced a lot, Shigaraki adds some seasonings to the pan, and then uses the spoon to make two wells in the vegetables, and cracks in two eggs. He covers the pan and takes out a small thing of pita bread.

In a few minutes, once the eggs have set, he takes that pan off the hot plate and puts it on a trivet, so he can warm the bread in a second one. That doesn't take long, and when it's all finished, they sit with the big pan between them, a plate and bread in front of each of them, and Shigaraki puts the yogurt sauce on top. He uses the pita bread to break the yolk of his egg and scoops up some of the mixture. Dabi hesitates, but he's usually not a picky eater, and he has to eat anyway. So he follows his lead.

It's definitely different from anything he's had before, but it doesn't taste bad, and after how miserable his meals have been for the past few weeks, he isn't about to complain. Not really. He is going to badger Duster though. "Needs salt."

"Add salt then."

"Why did you make me breakfast?"

"I made us breakfast," Shigaraki tells him, "That's high in protein, and hopefully tastes better than your shake?"

"...Yeah?"

"Good. Eat." And that's all he says about it.

Dabi decides not to look a gift horse in the mouth and they eat the shakshuka as Shigaraki changes the discussion to the files he was working on yesterday. That discussion goes on for so long, that he doesn't notice when they finished off the pan, or when the dishes and trash got cleared away into the bin and bag to be removed, but when they're done, Shigaraki is still talking as he gets out three small containers and a few more pouches from the grocery bags.

He only gets derailed momentarily when Shigaraki asks, "Do you like sweet things, savory things, or salty things?"

"What?"

Shigaraki doesn't repeat the question.

"Uh, I don't love sweets." He says after a second.

Shigaraki puts one of the pouches back in the grocery bag and steers their conversation right back to work. He keeps Dabi talking as he finishes with what he's doing, and when they've pretty fully debriefed, he suggests,

"I'm going to go change, and then we can go to the training room together."

Dabi glances at his phone, surprised that it's already after ten. "Oh, okay. Why are you joining me? I promise I'm not about to have another breakdown." He's not sure if that's true. He might. He doesn't know.

"I need to work on rebuilding muscle too," Shigaraki tells him, reaching for the hem of his shirt. He pulls the fabric up and Dabi sees that the other man is nearly as thin as he is, though he doesn't look hollowed in the sick way that Dabi is now seeing in the shape of his body. But the vivid, angry raised circular scars that dot his side speak to exactly why Shigaraki isn't at his physical peak. He knows from the reports that he also got shot in the leg at UA. "I figured that it would be easier if we did it together. Is that alright?"

He doesn't want to be babied. He doesn't need to be. The hardest things he's ever done, he's done alone. He can get through this too. But there is a little voice in the back of his head that says he doesn't want to. He doesn't want to be alone again.

"Okay."

Shigaraki smiles at him, and it's a very tentative thing. It almost looks like it hurts, like he hasn't smiled for any reason in a long, long time, and his face kind of forgot how to do it. Dabi isn't sure he remembers either.

An hour later when they're both catching their breath between sets, Shigaraki pulls the three little containers out of his bag and offers him his choice. One has cheese, nuts, jerky, and a few grapes in it, another has a homemade trail mix with a few different kinds of nuts, some pretzels, and dried fruit, and the last has some slices of celery, a little portable cup of peanut butter, and some raisins. Dabi picks the trail mix, and Shigaraki eats the celery, before they get back to work.

When they go back to base, Shig lists out a few options for lunch and lets Dabi pick one, and they cook it together. He hasn't cooked with someone else since he was a child, and he feels small again cooking next to Shigaraki. But it's different than it was when he was young. He was... always anxious when he cooked back then, always waiting to ruin something and prove to Enji that he was right to cast him aside. With Shigaraki he doesn't have to worry about that, because Duster clearly does not know his way around a kitchen and breakfast was a fluke. But they make lunch. And they make another snack to have between that and dinner, and when dinner rolls around, they have that too. Before Duster leaves for the night, he has Dabi take the shake out of the tiny shitty freezer and Shigaraki makes him shake the cup for a minute, and he hears the stuff inside get thicker and thicker. When he opens it, Duster offers him some different ice cream toppings, from toasted peanuts to strawberry sauce. Dabi doesn't like sweets, but he puts the chocolate sauce and some peanuts on top and eats the second half of the shake like it's ice cream. It's still not great, but it is miles better than it was all the past week, and Dabi tries to remember how to smile too as he thanks him.

///

The rest of the week follows this trend. The day after the first, he and Shigaraki sit down and they plan their meals and snacks for the rest of the week, sending whoever goes out to do the grocery shopping to do that, and then Duster kicks out all of the others so that Dabi can go down to the kitchen. He didn't realize how skittish he would be, but yeah, the thought of being open and exposed is making him want to ignite or pull his skin off. They cook and meal prep for the rest of the week, but by the time they're done, Dabi is letting out the most pathetic sounds that he's never heard from himself before, and he's shaking like a leaf. Shigaraki chuffs at him again and leaves everything downstairs a mess as he ushers him back up to his room, but even that doesn't feel safe anymore.

Shig makes him sit on the edge of his bed and pulls out his phone. A second later he goes to the door and pulls a shipping box through it that's nearly as tall as Toga. Dabi doesn't have his head on straight enough to even manage to ask what the fuck that is, and he doesn't end up needing too as Shigaraki drags it over.

"Okay, here. Why don't you make a nest, Dabi?"

Dabi knows that nesting is a thing that omegas are supposed to do on their heats, and when they're still sharing a bed with their pups. It's supposed to be a comfortable, secure place that helps make them feel safe. It's supposed to be instinctive, but as Shigaraki starts to take out the piles of pillows, blankets, and sheets, he feels lost. Shig waits for him to move and Dabi hunches in on himself,

"I... don't know how." It's supposed to be easy, isn't it? But looking at all of this shit, he can't imagine how he's supposed to make the pile of it more comfortable than just curling up on his little bed and pulling a blanket over his head.

Shigaraki pauses. "Okay. Neither do I." Dabi wonders how he can keep being made to feel even more inadequate than he was before. "But I've made a blanket fort before. Do you want to try that instead?"

"...Okay."

He and Shig move the two chairs that they've been using to work in front of the bed, about a meter from the edge of it and apart from each other. Then Shig looks around until he finds one of the specific packages and has Dabi tear it open and spread it out in the square of space that they've made for themselves. It's a pad of some sort that has been vacuum sealed and compressed in on itself, and when they leave it alone on the floor, it starts to re-inflate, and fill out the space. Shigaraki has him opening the other blankets while he gets the thin into a mattress cover that crinkles, the label from that proclaiming it will fit most nest pads and that it's waterproof so that, Dabi blushes, slick won't leak through and ruin it. They start to put down pillows and blankets together, and there are so many of them. Some say they're very soft, some say they retain smells better than others, some say they're waterproof, and a million other things that Dabi didn't know that omegas would want, or not want in their nests-- and it occurs to him then, that maybe Shigaraki doesn't know either. Maybe he just bought a little of everything hoping that one of them would work for Dabi.

It takes them about half an hour to get all the blankets and pillows settled inside, the nest nearly twice the size as his bed, and at the end, they use the backs of the chairs as posts, holding up two sheets that they secure together with clothes pins over their head that they stretch in a canopy over the nest by tucking one side under the edge of his mattress and draping the rest. It casts the underside in shadow and Shig holds open one of the flaps of the fort. Dabi hesitates, but crawls inside, and watches the flap close. He listens to the other moving around the room for a few minutes and feels... so small as Shigaraki cleans up the mess from all of the packaging. He feels small, but... not bad as he stays in the fort, feeling the heat of his body seeping into the air around him. It's going to get very hot in here if he leaves it like this.

Dabi kneels and reaches for the joint in the sheets, and he unclips a few of the clothes pins in the middle of the sheets, using them to open up a vent that also serves as a skylight, letting in a little more light and allowing the heat to vent a bit more. Then he's left sitting alone and the doubt starts to creep in again.

"Can you either come in or get out? I feel like a dumbass sitting in a pile of blankets with you just staring at it."

"Who said I was staring at you?"

"Are you?"

"...Are you sure you want me to come in?"

Dabi pulls one of the pillows close, making himself as small as he feels. "...Yeah. Not going to jump on your knot. I'm not in heat yet, Duster."

Shigaraki moves around the room again for a second, and then he hears him kneel down. He opens one side of the sheet and hesitates another second before he climbs in with him. They move around a bit, getting to a point where they're both comfortable and Shig gives him his afternoon snack. Dabi isn't expecting for that to make a warm contentedness roll through him and banish away the stress that had come from being downstairs so thoroughly, but as soon as he has his trail mix with three jerky strips, he starts to... purr.

He's never heard that sound out of his throat. He's never even heard an omega do it in person. His mother certainly wasn't purring at all in his memories. But he starts to make that sound. It's awful. It's rough and stuttery, like his body is trying to shake off a decade worth of rust to figure out how the fuck he's supposed to show that he's... happy. He doesn't know if he's been happy since he was five. Shigaraki lets the sound ride, just sitting with him, taking out his phone as Dabi eats his snack and clicking away on some mobile game.

They stay in the nest for the rest of the day. And when Shigaraki leaves for the night and Dabi has to contemplate taking down the sheet so he can get into his bed, he can't bring himself to do it, instead climbing right back into the secure pile of pillows. It's only when the other man is gone, that Dabi realizes the alpha left his scent all in his blankets. That even though Dabi's natural scent is all but gone because of his burns, that Shigaraki's has layered through the space. It's soft and warm, telling Dabi that he was content in this space too... that the alpha was pleased with what they put together, which makes him purr again. And beyond the emotion the can place in the scent, his nest just smells good with Shigaraki's smell like chai tea and the breeze on a stormy day. He didn't used to like the rain. It could fuck with his quirk, it made finding places to sleep absolutely miserable, and it invited sickness into his body.

But it's hard to think of a time he's ever felt safer or more cozy as he curls up with Shigaraki's smell in his nose.

///

Shigaraki makes the doctor move back his appointment for the end of the month, and when he goes back, he's up by two-point-three kilos. He looks like it too, able to see the way his stomach isn't so flat that it's practically concave, and his face doesn't look so sallow anymore, his cheeks rounding out a little again and making him... look a little more like his mom. Fluid retention, the doctor tells him, since he's also been exercising and trying to gain muscle and not just fat, he might lose the water weight again and start to see that weight increase much more gradually. He stops having to drink the nutrient shakes now that his diet is more balanced, as long as he replaces the calories that he loses if he removes that from his diet.

He gets back to base and finds that Shig is restocking his fridge with snacks and bursts into tears again because of his stupid hormones, and from the relief. This is all even more ridiculous given that as soon as he is allowed into the field, he'll be racing towards the confrontation with his father and his inevitable end. But he's realizing now that if he hadn't ended up here, if Shigaraki had kicked him out the second that he found out he was too weak to be useful right now, he probably wouldn't have ever even made it to standing in front of his father, let alone able to fight him. Duster takes his outburst this time with more grace, immediately chuffing at him and pulling him close. He holds onto him for a few minutes as Dabi ruins his shirt, and then he makes Dabi sit so he can lose his jacket and shoes, before he ushers him into their nest. He climbs in too, bringing Dabi's water bottle, and letting him get the stupid amount of bloody tears out of his system.

In about half an hour, once Dabi has stopped crying and he's gotten most of the gross blood off of his face, he manages, with a fair amount of embarrassment, "I'm on track for weight gain again."

But Shigaraki doesn't mock him for having a meltdown over good news. He just smiles, and it looks better than it did at the start of the month because he's been doing it a lot more. "Good. As long as you have your heat, no matter what the doctor says, I'll let you come on the training camp mission if you feel up to it."

Dabi blinks, "What?"

"You're underweight, and you need to keep getting better, but if you want to debut with the others, I'll let you. My leg is still recovering. I won't be able to run when we need to, so my teacher has decided that I have to stay here and monitor your progress over coms. Someone will need to stay out of combat and coordinate movements. You can make sure that no one can get near you, and I can have a nomu keep an eye as well. As long as you don't overdo it, as long as you think that you'll be ready for that, I'll let you go."

He is very, very lucky that he doesn't start crying again. "Thanks, Duster."

"Just keep this up. Go wash your face, I'll get lunch."

Dabi does as he's told, and they resume their schedule for the rest of the day. When they're finished much later with all of their work and have eaten their meals for the day, they tend to stay in the nest for another hour or two, Shig playing his game and Dabi reads, sometimes. Sometimes he just listens to Shigaraki's soft breathing, and soaks in his scent.

He's sleepy and content when he mumbles, "You're a much better alpha than I thought you were when we met."

He's not expecting the long stretch of silence that comes after those words and he wants to take them back. He didn't mean for them to be an insult, but they definitely sound like one in hindsight.

"I don't think I was a very good one when we met." Shigaraki tells him. "My teacher doesn't have a designation because of his quirk. Neither does Kurogiri. I wasn't allowed to socialize with many other people. I don't think I knew how to act before then. But... being around you is helping." He says it like a confession, turning to look at him finally. "I know that you're still the same rude asshole that I hired-- against my will--" Dabi appreciates the jab. It makes the rest of his words feel like they aren't scraping his skin raw. "But beyond that, you're someone I am responsible for. Someone I need to look out for and make sure that you're taken care of. I'm starting to feel the same way about the others. Starting to think about what it would be like to not be alone-- to... have a pack."

Dabi doesn't want to start crying again, so he tries sarcasm to push through the lump in his throat. "If you give me a nomu, I'll tell everyone that you're a perfect alpha."

Shig laughs, a short, soft thing that makes his insides feel warmer. "And what do I have to do to make that something other than lip service?"

"Be perfect."

"I'll do my best."

Dabi isn't sure which one of them moves first, which is probably strange because they move so slowly. But neither of them stop until their lips are pressed together. Dabi doesn't start to panic until the second after they're kissing, as he feels the cracked texture of Shigaraki's lips against his and he has to immediately wonder what his scars feel like under his skin, if this was stupid, if he should pull away quickly and make an excuse about his hormones acting up to get the other to leave him alone and not bring up this again. Then Shigaraki wraps a hand around the back of his neck and tilts his head to the side slightly, changing the angle and making it feel like their mouths were made to press together like this. Dabi's breath is caught in the back of his throat as he realizes that this is the first kiss he's ever had. He's pretty sure he shouldn't be kissing his boss who also tried to kill him once, but it's hard to focus on that when the movement of their lips makes his skin tingle softly.

When they part, Dabi hopes the ache across his seams is still just from him bawling like a baby earlier, and that he's not turning red. But it gets a little more intense when he sees Shigaraki's eyes searching his face, a heaviness there that makes that tingling in him feel even more intense.

He doesn't think he means to say, "Spend my heat with me?" As the first thing out of his mouth when he finds his voice. He doesn't know if it's really a good idea to go from his first kiss to asking for Shigaraki to be his first time when he's going to be out of his mind from his hormones. But Shigaraki doesn't balk at the suggestion, doesn't immediately shoot him down and makes his embarrassment any worse.

"I'll stay with you and help you prepare. Ask me again when it's closer. After you've had a little more time to think about it, okay?" He pairs the words with pulling Dabi close again, his lips falling against the crown of his head this time instead of his own, and Dabi feels so warm, the words not stinging like rejection.

"Okay." His hands curl into fists against the blankets so he resists the urge to tangle his fingers into his shirt and press his nose against his neck so he can drink in the warmth of his smell. Shigaraki stays with him for another hour, and that's enough for now.

///

They don't touch like that again, but Shigaraki does make him sit down with his laptop no matter how loudly Dabi protests as humiliation roars through him, and makes him actually look at heat supplies. Those range from more waterproof blankets and special smoothies like his nutrient ones to make sure that he stays hydrated and keeping his weight where it's supposed to be while he's on his heat, to toys.

"I am not buying a dildo."

"Technically the League of Villains is buying you a dildo." Shigaraki says without blinking. "And you're going to want it if you decide you want to spend your heat alone. Having a knot is going to be the only relief you'll get from everything, trust me. I had to spend a few of my ruts without anything to help and I was miserable and about two seconds away from decaying my own dick." He pauses, "You might also want to get some quirk canceling cuffs if your quirk is going to be so high. I don't want you to set your nest on fire." He just goes on like this is a perfectly normal, and not entirely humiliating thing to be talking about, "The doctor mentioned you might have cramping, didn't he? We should get you a heating pad too."

Dabi throws up his hands and slinks down into the nest. "Fuck it. If you're not going to listen to me, then you can buy the heat supplies! You know more about it than I do!" He grabs one of the blankets, pretends it's not deliberately the one that Shig was laying on last night and burrows underneath it.

"You're acting like a child."

Dabi blows a raspberry at him to prove his point, flicking him off as he does. But Shigaraki closes the laptop and shifts their conversation to the much more comfortable topic of work, and he hopes that means this discussion is over.

///

It's two days later, very deliberately when Shigaraki has his own appointment with the doctor, that Dabi hears the thump of a package being delivered outside of his door. He hesitates before he climbs out of his nest, feeling like even just the distance between his nest and the door is too exposed. Still. It might be groceries, so he has to get out of the nest and he makes himself go over to it, poking his head out and seeing a large box. He pulls it into his room and closes the door swiftly, finding a knife to cut open the tape. He chitters happily when he pulls out another new blanket for his nest, but removing that lets him see some of the other boxes beneath it. On top is a heating pad in a long flat box and beside that is another that happily proclaims that it is an eight inch dildo with an insertable knot in 'glacier blue' that comes with an attachable suction cup or pillow strap base. 100% silicone and body safe.

Dabi lets out a humiliated keen.

///

It takes him about an hour, but he eventually forces himself to take everything out of the box and sees that Shig did get him plenty of the heat smoothies that he loads into the fridge until they're needed, along with some quirk suppression cuffs, and special cleaner for the dildo to get it sanitized and ready for use. He really doesn't want to use that, doesn't want to take the dildo out of the box, but he's so morbidly curious about what a knot even looks like, given he hasn't ever even seen one before, that he can't help opening up the packaging. The garish box makes way for bubble plastic and a silky black bag to put the toy inside after use, and an entire booklet of warning and safety tips. He is genuinely worried he's going to need those quirk cuffs if he keeps getting any more overheated from his embarrassment, but he proceeds anyway and opens up the second layer of packaging and gets his eyes on the toy.

Eight inches is a lot bigger than he thought it was. Dabi lets out another miserable keen. The dildo looks very realistic-- other than the fact it is the neon blue of the packaging, of his quirk, but the head looks like a real cock, and the shaft is detailed with thick winding veins that go down to the last three inches of the toy and then abruptly swells with two bulbous shapes on either side, changing the shape drastically from his own cock and making him a little dizzy. How the fuck is he supposed to get this inside of him? Dabi would have a better chance of shoving an orange up his ass. He is still staring at the thing, completely intimidated, before he hears Duster's soft knock before he lets himself in, the same way he has been for weeks now.

Dabi looks up at him, not knowing at all what his expression might be saying, but at least Shigaraki immediately loses any words as well as he sees the neon toy in his hand as the door shuts softly behind him.

"You're a fucking pervert!" He throws the dildo at the other and then darts down into his nest, grabbing one of the pillows that is saturated with Shigaraki's scent and pulling it close to his chest, like that can comfort him. Duster's smell is comforting, even if he has half a mind to kill him for this humiliation. He doesn't hear the thunk of the toy hitting the other or the floor which means that it's probably dust now if he caught it, and Dabi doesn't know if he's glad to be rid of it, or if he really shouldn't have done that. Shigaraki is trying to help take care of him. He's not supposed to be an ungrateful brat about that.

But Duster moves towards his nest and he sees his shadow as it falls across the front flap of the entryway. "Why are you upset, firefly?" Shig's voice is gentle and patient and the pet name makes Dabi's cheeks feel even warmer.

"I don't want heat toys."

"Can you explain why not?"

It's so hard to try and think straight through the high whine of panic that feels like it's going through his head, but after a minute Dabi forces himself to start talking.

"I don't want to have to use those. I don't want to be helpless for a week, in pain, and vulnerable. I don't want to be out of control again. I-- I don't want to get pregnant, I don't want to be claimed, I don't want someone to hurt me like-- like my mom." He can taste smoke on the back of his tongue, hates how weak he already sounds, "I don't want to be an omega."

Shigaraki is quiet for a long moment as he processes Dabi's latest fucking breakdown, but when he does start to speak, he lets out a soft sigh first. "Dabi, you know that you can't change that."

"Fuck you." He also knows he's being over-emotional, but he doesn't actually want to hear that right now.

"You can't, firefly. This is something you're going to have to deal with for the rest of your life. But you won't be in pain forever," he keeps his tone low, though that doesn't impart as much gentleness as Dabi might have expected. "It will only be as your glands wake up for the first time. You won't be helpless. The cuffs I got you can be taken off whenever you want to, and they can't be locked. If anyone tries to hurt you, no matter how deeply you're in your heat, you'll be able to set them on fire, Dabi. Your heat is going to make you extremely, extremely horny, but it's not like what people say about being 'out of control'." Shig promises. "You won't completely forget where you are or get so mentally fatigued you lose your sense of self-- not unless you're completely dehydrated, and that's not going to happen because you're going to have your full fridge of smoothies to drink while you're in heat. The doctor told you that you can't get pregnant, and if you're still scared about it, a silicone toy won't be able to do that for you anyway, Dabi."

There's a small pause and then he goes on, "I don't know what happened with your mother," and if there is a verbal signpost for 'and I don't want to touch that with a ten foot pole', Shigaraki is waving it, "But as long as you're here, you are not going to be claimed by anyone unless you change your mind and decide you want that. You're going to have your heat in here, in your nice, safe room, with the locks on your door, and everything you need so that you don't have to worry about anything but making yourself feel good. By the time you're finished, you're going to feel so good, and I'm going to let you use Kurogiri as your personal errand boy and let you send him off to get you anything you want as you recover. You won't have to see anyone until you're ready to be a pain in everyone else's ass again-- and especially mine."

Dabi doesn't say anything for a long moment after he stops speaking, but when he does, he's still got his face half-buried in the pillow. "You're a bastard."

"Why?"

"You just called me irrational for like five minutes straight instead of being even vaguely sympathetic, and you completely shot me down while doing it like I wouldn't notice."

Shigaraki snorts and seems to think his petulance means that he's not likely to get kicked out again, and he pulls half of the sheet aside so that he can start to crawl into the nest to join him. "I can be sympathetic if you want me to be, but you know you're being irrational." Dabi's face goes hot again when he sees that Shig is holding the dildo. "I wasn't shooting you down, firefly. I'll stay and help if you want me to, but I want you to have explored all of your options first. I don't want you to ask me and regret it." He didn't dust it by accident, and as he crawls up to him, Dabi hides his face in the pillow to block him and it from his sight.

"And you bought me a dildo that I won't ever be able to use!" He hears the toy thump into the blankets and Shig chuckles softly before he's carefully catching Dabi's wrists. He pulls a bit, but Dabi holds the pillow tighter. He'll smother himself with it if it means that he won't have to look at him right now.

When he won't let up with the pillow, Shig gives up on it, and just presses a kiss to the top of his head instead. "Why not, Dabi? Even if we do spend your heat together, if my rut doesn't trigger during it, you'll still need something inside when I can't give it to you."

Dabi didn't really think of that, but he isn't about to say that. Besides, it doesn't address his biggest gripe about the toy, namely, "It's huge! Knot aside, eight inches of anything is not going inside of me!"

He's not expecting for his outburst to be met with a sudden shift in Shigaraki's scent. Something that he's never smelled off of the other man before and that surprises him so much that he immediately forgets his stubbornness and looks up to see Shigaraki's face. His eyes are a little wide, his mouth parted in slight surprise, and embarrassment is spilling from his pores.

Dabi's brain comes to a screeching stop and neither of them say anything for a handful of agonizing seconds.

"Wh-- D-Did you get that because--?" Dabi's eyes flick down, but at this angle, he can't really get his eyes on Duster's crotch. "No. No. You wear skinny jeans all the time. You couldn't possibly--"

"I thought," And Duster's voice is a little higher, a little more breathless, "that would be a good warm-up. But we can get you something smaller if you'd prefer."

"'Warm-up'?!"

///

It is devastating in such a particular way to learn that Shigaraki apparently has a monster cock that Dabi is going to have such a hard time of dealing with that the other man thought he would need something to practice on even when his body was going to be absolutely gushing for it, but they don't actually linger on it for too much longer that night. They eat, and they talk about other distracting things, and pretend that they aren't both embarrassed about the way they are fumbling towards... sleeping together.

But Shigaraki has decided that embarrassment is the enemy by the next night, rather than the natural next step in this whole situation, and comes to Dabi's room with determination, a bottle of whiskey and a six pack of soju, and his laptop, not even blinking when he asks, "How much sex ed have you had?"

Dabi almost immediately overheats from the instantaneous spike of adrenaline.

Shig won't be dissuaded though, and once they've had dinner and are settled into their nest, he queues up the first video that he's downloaded for them to watch.

Dabi isn't expecting the video to be almost presented like a nature documentary, though it's all animations with a soothing female voice narrating. It starts at the very beginning, stating that all humans start as betas in the womb, but that just like their primary sexes, another set of genes gets activated resulting in alphas and omegas, and if those genes aren't activated, then betas are born. Alphas and omegas are both recessive traits that have a complex presentation that crosses over a couple of different gene markers like eye color and hair do, which can result in them being much less common than betas, who don't have any of those genes to turn on or off. That's also why it's so rare for alphas and omegas to be born from two betas having pups unless they have an alpha or omega ancestor.

The video goes on from there, describing that the early markers for their designations are in their DNA from early in their development, but that they can't be judged by anything but medical testing from when they're born until they hit puberty, despite common superstitions. During puberty, the genes turn on again as the pituitary gland activates the pup's primary puberty. When that activates for male alphas, it means they develop their ability to knot, while female alphas will find what appeared to be their clitorus lengthening, which is actually their penis pushing out of their body. Their testes stay internal, which can make it harder for them to produce healthy sperm, but they also should, unless there's a medical problem, have a working uterus as well which allows them two avenues for their fertility. That's interesting, if nothing else, but when the section about omegas starts to play, he does his best to not sit up straighter as he listens.

Female omegas have larger glands along their vagina than a beta or alpha female that help them with the extreme production of slick, as well as a secondary set of muscles inside of their vaginal opening that allow them to 'lock' a knot inside, helping to ensure a higher chance of impregnation within a single mating session. Male omegas don't have a typical vaginal structure, they have something like a cloaca, with the slick glands in their anus along with the additional muscles for locking in a knot. But when those glands start to swell to produce slick, some weird skin flap that the video compares to the thing that closes the esophagus and trachea when eating, closes off the actual rectum, ensuring waste can't be pushed into their vaginal canal when they're being mated.

The video goes on from there, explaining how when an alpha goes into rut, they will grow more sensitive to smells, more restless, and more aggressive with other alphas, or anyone who seems like a threat to the idea of them getting a mate. Omegas, on the other hand, start to have anxiety about their environment, and will instinctively seek out comfort, food, and the companionship of those they trust, to help take care of them when they're in their heat. It's apparently not uncommon for omegas to gather for their heats at times, creating a large group nest if they don't have mates to take care of them, and then spending their cycles together, taking care of one another, male omegas even producing sterile heat fluid instead of semen. A good heat, one where the omega has the supplies they need, if they've been eating, staying healthy, and feel safe, won't be the agony that Dabi has thought of it all of his life. His mom wasn't safe at all, she definitely wasn't healthy when she was so stressed out of her mind he remembers her leaving frost on everything that she touched. She had a bad mate. Her heats saturated their house with the scent of her pain and misery-- though that was under Enji's possessiveness and determination.

The video finishes, and Shig finally cracks open the bottle of whisky, having refused to let him start drinking until he watched the video.

"Questions?" He asks, seeming to still refuse to be bothered as Dabi happily takes the drink and doesn't bother to sip at it and enjoy the flavor, just wanting the burn of something that isn't his blush.

But he doesn't get a refill until he's managed to mumble, "Not really about the... biological stuff. That was... pretty thorough."

"So what about the non-biological stuff?"

Dabi is definitely blushing hot enough that it's probably visible even through his scars. "I don't know. I guess what it's actually like?" When it's not awful, "What's your rut like? Have you been with an omega on it before?" He wouldn't have had the balls to ask that a month ago, but Shigaraki is the one insisting they do this whole song and dance instead of just letting Dabi get overwhelmed when his heat triggers and go from there.

"I am territorial, I get more irritable, the itching under my skin gets," he winces slightly, "really bad until my cycle actually starts. The first few times, I didn't have anyone around, and I didn't have any toys, and I felt like I was going to stroke myself raw. Later on I got a couple of things that made it easier for me to deal with in the periods of time when I wasn't consumed with my lust." He hesitates for a second, "I have had two of my ruts with an omega."

Dabi waits, but more details don't seem to be forthcoming. "C'mon, Duster, you can't leave me hanging. Was omega pussy not all that it was chalked up to be?" Maybe that's why he's being so dodgy about this. Maybe he doesn't want to spend Dabi's heat with him. Maybe he doesn't... want him.

"She was fine. During our cycles, I would say she was exactly what I needed, but I didn't know her very well, and I was glad to be rid of her when our cycles were over. I only shared my cycle with her because I needed to lower the scent of my hormones so that I would be able to make my debut at UA and have the scent patches actually work."

"Oh." Dabi hasn't ever heard of an alpha or beta using scent patches. Normally omega use those so that they can pass as betas, because omegas are still often thought of as nothing more than baby making devices. With the patches, they can pass as betas. "Okay, sorry for pushing, you don't have to talk about it if you don't want to."

"It's fine, Dabi. It's just not something I can give you a lot of details about. Sex, especially on my cycle, is good. I enjoyed it, she seemed to as well, but it really wasn't that different from sex in general, it was just a lot more frequent and longer than usual. Whatever you're used to, it will be like that, just heightened." He hesitates, "You were upset about the dildo," Dabi blushes and pours himself a new glass. "Have you... never tried anal before?"

Dabi is glad he's pouring because it means that he doesn't have to look up when he admits, "Never tried... anything before, Duster. Think my hormones were too fucked up to let me have a sex drive." He's sure he's going to burn his ears the rest of the way off from how hot they are, "Never even touched myself before."

He doesn't know if he was really expecting mockery. Shig has been really, really good about not mocking him about any of his inexperience and not asking about why he's so fucked up. But he doesn’t think he was expecting the other's natural spicy scent to go so much hotter and roll out through the air in their nest and send a different kind of warmth under his skin. Dabi nearly fumbles the bottle as he looks up and finds red eyes boring into him.

It takes him a second to find his tongue and croak out, "Oh my fucking god, you are such a pervert."

Shig has the good grace to look a little chastised, trying to reign in the way Dabi's admission spiked his arousal so completely. "It's just... very flattering that you would ask me to be your first."

"Yeah, super flattering, so flattering that you finally smell excited about getting to stick your enormous dick in my ass. I can't believe that you have a virginity fetish. You're a weird reclusive gamer. You're supposed to be the virgin!" Dabi huffs.

"Is that so?" Duster doesn't bother to keep the amusement out of his voice.

"Yes." He refuses to look at him, actually taking his second drink a bit more slowly, trying to pretend he doesn't feel a little dizzy from how good he smelled when he was getting hot, and like that smell isn't sitting in their nest all around them. He doesn't want to embarrass himself anymore.

"Are you just going to pout for the rest of the night, firefly?"

Dabi doesn't answer, obstinance the only path forward for his dignity.

"...Do you want to watch some other... unconventionally educational videos about shared cycles?"

"What the fuck does 'unconventionally educational' mean, Shigaraki?" Dabi asks. The other doesn't offer up an answer immediately and Dabi puts the pieces together, "Porn?! Are you asking me if I want to watch porn with you?"

"You asked me to spend your first heat with you and what it would be like. I'm not saying that all porn is realistic, but porn with actual actors on their cycles is much more realistic than anything else. Because instincts are so high, they can't have a crew on set, they just hunker down, turn on the lights and cameras, and do their thing for their cycles, and then it gets cut down to the hottest parts in the editing room. But that might help you get a better idea of what it looks like from an omega's perspective when it happens."

"You just have an answer for fucking everything, don't you?"

"If I didn't try, you wouldn't want to follow me , would you?"

Dabi wants to light him on fire. But that would mean burning up their nest that is so cozy and smells so good with the lingering threads of Shigaraki's arousal in it. So Dabi drinks his second glass, and then curls up more snuggly in the pillows and blankets. "Fine."

He barely keeps himself from giving Shigaraki so much shit when he doesn't have to go searching up this kind of content, instead just navigating over to his saved files.

///

They watch three videos. The first is with a male alpha and female omega, the second with a female alpha and male omega, and the last with a male alpha and male omega. Each of the videos has a different porn premise attached to it that Dabi is extremely embarrassed over, the first being a repair person who wanders into the house because the omega hit her cycle too fast to cancel, and she all but throws herself at him. She seems to have a very, very good time though. The second is a femdom playing with her sub, with leather, latex, whips, and chains all in play in addition to their cycles. And the final one is about an omega who has gotten in too deep with his loan shark and is offering up his cycle in exchange for a clean slate. Dabi learns two things from these videos: One, Shigaraki is absolutely a massive kinky pervert whose brain is totally rotted from porn because he doesn't even smell hot while they're watching these together. And two, that... it will be different than he thought it would be. Because the actors remember that they're actors even when they're in their cycles. Their movements get a little sloppy, the cameras having a hard time finding good angles sometimes because they forget that they don't have a crew or director to move the cameras, but they never forget the scenario when they're spouting off their dirty talk.

Seeing that he won't be completely gone or catatonic the way his mother had always seemed before she went into rut and after she came out of it, means that watching all of these was worth it in the end. It's a relief that he doesn't really even have words for when they finish. He'll still be him in his heat. Duster will still be himself if he goes on his rut too. They're still not finished with the last video, but Dabi uncurls himself from the nest and reaches for Tomura's sleeve.

Shig blinks, turning to him immediately, "Is it too much, firefly?

He shakes his head weakly, feeling his embarrassment make his temperature rise again. He pulls on his sleeve a little more insistently and Shig gets the picture, turning his body more towards him, and Dabi leans in. Duster wraps his hand around the back of his neck again, touch always so light and careful, and pulls him in for the kiss he wanted.

The kisses they shared before were soft and slow, and this one is definitely both of those things, but it's different this time. Because this time, there is a spark that is coursing beneath it. Something that makes Dabi's skin tingle before he's even started to open his mouth for it. And when Tomura's tongue slips inside, Dabi can't help it. He loses control of his scent the way Shig had earlier, and even though his glands are extremely damaged across his neck and wrists, he's only wearing thin sleep pants, and the faint sugary smell of his arousal starts to fill the space between them. He's about to pull away and make some kind of excuse, he doesn't even know why he would do that when they are... something. Definitely having serious conversations about fucking as soon as his heat hits at the very least. Being aroused with him shouldn't embarrass him, and when Tomura's scent starts to get hotter in response, Dabi's relief is immeasurable.

Tomura knows what he's doing, so he takes charge of the kiss as the sound of the couple fucking spills through the speakers. He licks inside of Dabi's mouth and shows him how that can feel good. He encourages him to tilt his head, to move his lips, to use his own tongue, nervous as he tries to mimic the movements. He doesn't know if he's doing well or if his inexperience is what's making this hotter for Tomura, but he stays smelling warm with his arousal as he kisses Dabi again and again until it's Dabi pulling back with a soft gasp before his teeth are clenching down to keep any other sound out of his mouth.

There's a deep, unfamiliar ache that is starting in his pelvis and it sours his scent with pain.

Shig pauses and looks at him, confused. "Are you alright, baby?"

"I-- I think," he swallows his pride. They were barely making out. "I think my glands are trying to work."

Tomura blinks, and then his whole expression brightens. "That's good, firefly."

"Tell that to my fucking nerve endings."

Tomura has the gall to laugh, but then he moves to press another kiss to his forehead and pause the video. "I'll get you some pain medicine and your heating pad. If it goes away, then you're not in pre-heat yet."

"And if I am?"

"Then I'll stay with you, if that's still what you want, Dabi."

He makes himself meet his eyes. "Okay." It's easier to say that than so bluntly admit to him that's all that he wants. Shigaraki has been with him through every step of him trying to get healthy. He's... the only person Dabi has ever trusted like this. He knows that he'll take care of him and make sure that he feels good. He believes him when he says that he'll be a perfect alpha for him just to prove that he's worthy of everything Dabi has chosen to trust him with.

And he thinks the other knows him well enough to infer all of that from the simple answer. It earns him another kiss against his forehead and then Shig confiscates the alcohol and gets out of their nest. When he comes back, it's with one of his water bottles from the fridge, the heating pad, and some medicine, and he stays with Dabi as the pad heats and medicine kicks in.

The ache goes away after about half an hour, but Shig stays for at least a little longer than that, with Dabi curled up against his side, his arm wrapped around him, and tracing the patterns of his scars over his shoulder. He must stay for a little while because he lingers long enough that Dabi falls asleep and can't remember being moved.

///

Dabi wakes up with sweat soaking his skin, and the pain from the night before so, so much more intense than it was then. Intense enough that Dabi lets out a pitiful whimper and immediately fumbles to turn on the heating pad again, even though it's already sweltering in the enclosed canopy of their nest. Their nest. His and his alpha's. Dabi whines softly, looking around. Tomura isn't here. He doesn't usually stay the night, he knows that, knows that he always comes to see him early in the morning, but he wants him now.

Okay, well, if he has to wait for him, he can at least fix their nest. Dabi liked being closed inside of the fort, but it's far, far too hot for that now, and the blankets and pillows are a mess. He takes down the overhead sheet, opening up the nest to the cool air of the rest of the room, and then he starts to shift things around. He lays out the waterproof blankets just over the round futon that makes up the base of the nest, to keep it clean, and then he starts to push the pillows around, building up an edge around each part of the bed until there is a rim around the entire thing that makes it feel secure. Dabi feels a tickle in his throat and tries to cough it away, but it persists, and as he lets out the next slow breath, his whole chest starts to hum softly. It takes him a second to realize that despite the discomfort in his pelvis, he's purring as he puts all of the super soft downy blankets Tomura got for him back into the nest. The blankets smell like them too, and as much as Dabi just wants to curl up in the mound with his face in those, he knows that he has to keep being good if he wants to retain permission to go out on the League's debut.

So Dabi crawls over to the minifridge, really not trusting his legs to not shake badly if he were to try and walk there instead. He doesn't feel hungry, he's just hot, hurting, and anxious. Doesn't matter. He has to be good and make sure he eats something. He usually waits to have breakfast with Tomura, but he wants his alpha to make him feel better, and he will always prioritize making sure that his physical needs are met first. So Dabi takes one of the heat smoothies, something that he can have cold, and something he won't have to worry about having to prepare in any way. Tomura got him the fruity kind instead of the artificially sweet ones and Dabi likes it a lot more than his nutrient shakes. He drinks it quickly, liking the way the chill settles in his stomach, and then refilling his water bottle from the little pitcher in the fridge before he gets the pain meds from the night before and crawls back over to his nest. He turns on the heating pad even though he's already a little too warm, and takes the pills. It's with some hesitation, but he digs out the quirk cuffs from the 'heat box' and puts those on, allowing his temperature to lower enough he doesn't think he'll bake himself alive curling up tight in the blankets with the heating pad until Tomura comes in.

He pulls the blanket that the other man had been laying on the night before right up to his nose. His smell is so good. All that hot spice of an alpha, but the calm pulse of rain going over it all. It's so... reassuring. Tomura has made himself kinder, softer, more responsible for him. He's been spending every day with him despite all of his own work just to make sure that he's alright. He's embarrassed him a lot, but all because he wants him to feel better. Because he... believes he's worth the time. He didn't just throw him away when he needed that help to be everything that he thought he would be when he hired him. He cares about him. Dabi doesn't know if he's had someone who has done that since he was a child.

It takes another half an hour before Shig knocks on his door and steps inside, and as soon as he does, Dabi is squirming because the discomfort and anxiety switch abruptly to a sharper pain and an overwhelming pulse of heat that goes through his body and tells him that yeah, this really is happening. It's not just a little pang like the night before. He's going into his heat.

Not even twenty-four hours ago, that prospect terrified him. Now Dabi starts to purr loudly as soon as Tomura takes a step into the room. The pain is more intense, but that's okay because it means his body is doing its best to try and get itself ready to help make both he and his alpha feel good.

"Tomura," he whines, trying to push himself up in the nest, wanting to bring him closer as fast as possible, even if that means trying to put weight on his shaky legs.

"Oh, firefly, don't move--" He throws the lock shut and slips out of his shoes at the door, before crossing the room and immediately kneeling down at the edge of the nest. But he doesn't come into it right away.

"Duster," he sounds more petulant this time, reaching for him again.

"I know," he says placatingly, "but are you sure--"

"Get in here and show me how this is supposed to feel good or I'm going to set you on fire!"

Tomura laughs at him again and reaches into his back pocket, taking out a set of leather gloves with the index finger cut out of them, and slips those on before he climbs into the nest with him. "Okay, baby boy, don't be cranky." He pulses out the smell of his contentment, and Dabi whimpers as that pain gets a little bit sharper and makes him squirm as his legs press together instinctively. That hurts, but the rest of his body is starting to feel tingly, and the smell of Tomura's happiness makes him a little light-headed. He wants his alpha happy. It means that he did a good job remaking their nest. And Tomura doesn't just stop by reassuring him with his scent, he also gathers Dabi close and nuzzles along his shoulder, dragging his nose up the side of Dabi's neck as he holds him, and murmurs, "You did such a good job getting everything ready, Dabi. I promise I'm going to take care of you just as well." He rubs his scent into Dabi's skin and all of the sudden that pain inside of him snaps.

Dabi lets out an animal keen that he didn't even know he could make as the pain disappears and instead his system is absolutely flooded with the arousal that he thought he should be expecting as an omega in heat. He feels his slick pulse hot down his legs and soak through his pajama bottoms immediately as his cock hardens to the point of aching in a matter of seconds. Holy fucking shit. Dabi doesn't think he's ever felt arousal like this-- no, he's positive that he hasn't. That this is the most intense form of need that has ever been pushed through his body. That he wants to be touched right now, more than he'd even wanted to stop burning in the moments before he'd died. Dabi tangles his hands in Shig's hair, feeling how soft and thick it is, and pulls his face up from his neck so that he can crash their mouths together.

Tomura's scent is going thicker in the air, even as he lets out another breath of laughter against his lips, which is why Dabi doesn't bite him hard enough to draw blood as he tries to get his tongue into his mouth the way it was last night. His alpha chuffs at him softly, and his hands, made gentle to protect him, are wrapped around his body, pulling him closer even though Dabi is making such a gross mess as the slick smears all over his skin. Dabi saw how much those other omega's could produce, he knew that people called omega's on their heats a 'slip 'n slide', but he had still half thought that it was a figure of speech. He understands just how sincere those things were now as he feels his pajama bottoms clinging to his legs as every drag of Tomura's tongue behind his teeth has a fresh bit of his slick leaking out of his hole with no signs of stopping. Dabi is pretty sure he won't stop until Tomura has his knot sunk deep inside of him and he's full of his cum.

He doesn't think that last night he was thinking about how good his alpha tastes, but underneath the flavor of his toothpaste, he can find traces of his scent lingering on his tongue, and Dabi would give up breathing entirely if he could just keep licking out that flavor from his mouth. Dabi lets out a moan loudly enough he's a little worried about how thick the walls are as Tomura makes him part, but consoles him by licking across the seam of his chin and nipping at his jawline like his scars aren't even there. Dabi is pretty sure he should be bitching at the other for being gross, but instead the thought of being tasted, of being claimed by the alpha is making him even harder. It's a surprise to him when he realizes that his legs aren't clenched tight together anymore to try to smother the pain of his glands, and instead he's opened them up. That he's wrapped them around Tomura's thigh so that he can rub himself against his leg, his cock aching and leaking almost as badly as his hole as he tries his best to get the other to keep making him feel good.

Tomura lets out a growl that he's never heard before, a sound so deep and low that it vibrates through Dabi's body and leaves him gasping out another moan. "That's it, baby boy," his voice rumbles against his skin as he noses at his neck, licking at the place where his scent gland should be burned away and making Dabi moan again. He is pretty sure he didn't want to be claimed, but when Tomura gives a gentle nibble against that place, Dabi gets dizzy from how good that it feels. Shig's hands wrap around his hips and he coaxes Dabi's hips into moving against his leg. "I want you to feel so good, firefly. Show me what you like."

Dabi feels dizzy from how thickly their smells are swirling around the air between them and he's pretty sure that he should just push down his pants so that he can fist his hand around his cock, but he doesn't want to stop clinging to Tomura. Like if he lets go of him, the alpha might abandon him even though he's being swaddled in the reassuring scent of his arousal. But it feels so good to rub himself against Shigaraki's thigh. He's more solidly muscular underneath his jeans, and the thick denim is giving him a tantalizing texture even through his pajama bottoms. He ruts his hips up against his leg again and moans, dropping his head back against the pillows. Tomura chuffs with his approval, leaning over him and grinding his thigh up between Dabi's legs more deliberately, putting more of that wonderful friction against his body.

"That's it, beautiful. You can have anything that you want. Just let me make your body feel good."

He's pretty sure that if he weren't plunging deeper and deeper into his heat, he might have protested. He might have been embarrassed over how much of an absolute mess he already is, but it's hard to care about anything else than how good his body is feeling and how nice it is that his alpha is being so sweet and gentle with him. Tomura presses his neck to Dabi's as he lets him move his hips more and more frantically against his leg. The touch of their skin there bleeds out across their entire nest and somehow sparks pleasure behind his eyes like a firework nearly as bright as the actual friction that he's getting against his dick. The way that their scents tangle makes the whole room smell like completeness. He's not alone. He's not hurting. He's with his alpha, and he's going to be safe, cared for, he's going to get to feel good for the first time in his life, and he doesn't have to be scared. He's not going to be abandoned.

Those thoughts, possibly more than anything else, are what allow Dabi to let go of the last lingering threads of stress in his body and let him sink deeper into the hazy warmth of his heat. He ruts his hips harder and faster, until even just one more little twitch is enough for him to feel his orgasm washing through him for the first time in his life. It isn't like the way that he expected it to be. He thinks that he expected him to feel like he was going to ignite again, and maybe he would have if he didn't have the suppression cuffs tight around his wrists, but instead what he notes is that the pressure growing along his length makes his balls draw up tight to his base like if he were cold, so tense and feeling so full that he's not surprised that he can't keep it all inside. And at the moment of release, his entire cock feels like it's pulsing the sharpest pleasure he's ever felt along each inch of him. It makes the muscles of his thighs shake and fall slack as he feels the forceful ejaculation spill all over the front of his pajama bottoms in ropes that almost ache as he feels each spurt of his cum release from his body. Dabi is breathless from how good it feels, and it takes him a long moment to realize that he's moaning so loudly that his voice cracks as the sound rattles out of his throat.

"Fuck, that's it, Dabi. You're so cute, little omega," his tone is so teasing, but he can't even protest it when being called that has him letting out a little chirpy noise of bliss. He's the omega. He's the one who's being cute. No one has ever called him cute before. No one has ever helped his body feel good like this before. "And you smell so good." Dabi isn't sure that he's been paying attention to anything but how good Tomura smells, but he does try to find his own scent in the tangled mix of them. He normally doesn't think that he smells like anything other than smoke and burning, but now he can smell himself. There is an overwhelming sweetness coming off of his skin, something that reminds him of caramel, though there is still a little tang of burning in it. The edge of his fire that darkens the smell with a touch of his smoke. He doesn't think it smells that good, but he doesn't really like sweets anyway. "Let me get you out of those wet clothes, baby."

Dabi is reluctant for it, only because it means that he, apparently, has to let go of Tomura. But his alpha makes it an easier thing to do by making sure he's laying against the nice warm nest, and presses kisses to his lips and across his face, letting out his own deeper, satisfied purr as he does it. Tomura leans back and pulls away his own shirt, his skin, Dabi notices distantly, starting to get warm for the first time against his own. His body is always so cool to the touch, but he likes this a lot. It makes it feel like he's actually seeping into the other's skin. Then he reaches for Dabi's soaked pajama bottoms and Dabi trembles as he makes his soupy muscles work to lift his hips enough for Tomura to pull the fabric off of his legs.

When he's naked, Dabi is still feeling off-balance, but he tries to push himself up so that he can roll over. Tomura pauses him with his hand against his chest, eyes roaming over Dabi's body like he wants to eat him alive. "Where are you going, firefly? Do you want to stop?"

Dabi whimpers. He doesn't want that at all. Not when his cock is still just as hard as it was before his entire length was dripping with his cum. His insides feel like they're coiling tighter and tighter, desperately searching for a knot to hold on to. "No, alpha," he doesn't think that's what he meant to call Tomura, but the word slips off his tongue before he can stop it. It doesn't seem like it's a bad thing though. The other man gives another one of those low chuffs of approval and Dabi swallows whatever's left of his pride and keeps going. "...I was going to present," he feels his cheeks go a little hotter. "The way all of the omegas in the... videos did."

"Oh, precious," Tomura leans in and nuzzles their noses together before peppering his hot face with kisses. "You don't have to do that unless you want to. I would be perfectly happy for you to stay just like this so that I can see how cute your face is when I have you cumming on my knot."

Dabi lets out a whine that is nothing but humiliation as that has his hole clenching needily and sending a fresh pulse of slick down his thighs. "Need it, Tomura. I-It hurts." He thought he was supposed to stop hurting once he got so hot, but he feels miserable as he waits to get more.

"I'm sorry, firefly, I'll help you feel better." He promises, his eyes dragging down his body. His hands follow the path of his eyes, tracing over his shoulders, down his chest and rubbing his thumbs over his nipples. The feeling of the soft leather against his skin makes him moan again. His nipples are already more sensitive from his piercings, but the way that they feel now is far more sensitive than they ever have been before, and Dabi finds himself moaning and arching into each touch. Tomura starts to let out a continuous, deep purr as he touches him, hands moving away far too soon so that he can bring them down along Dabi's stomach, one dipping between his legs, and one covered finger, and one uncovered, running up his aching cock, and smearing through his cum. "Never been touched before, but you couldn't help decorating your pretty cock just like the rest of you, could you, baby boy?"

Dabi can't form a coherent sentence to answer him, he's too busy spreading his legs even wider and scratching his nails up Shigaraki's back. Tomura wraps his hand around his cock and gives him a stroke from root to tip, his length already so soaked that his glove glides across his skin and sends fresh pleasure going through his body. His hand doesn't stay there either though, and Dabi is about to beg for it back, before he sees that Tomura's eyes are starting to glow from how high his instincts are going. And then his hand is moving down, knuckles rubbing against his balls, and then pushing back--

He can't believe that just having Tomura's fingers rubbing against his hole can feel almost as good as it did to ride his thigh. "Alpha!"

It gets him another growl, Shig's scent going hot and him moving his hand to the back of Dabi's thigh, holding his legs open as wide as they can go, and then grinding his still clothed cock against his hole. Just that pressure there has Dabi mewling, his breath hitching in his throat. "You were so nervous before, little one." Tomura's voice sounds deeper, richer in some way that Dabi doesn't quite understand, but that makes his own instincts feel like they're about to go insane. He wants to have him, wants to have more, but he doesn't know how to get it. "Are you ready to feel what your body was made for now?"

Yes, yes, that's exactly what he wants. "Please, alpha," he pulls at Shig's shoulders, trying to get him to lean in again. He'd give him his mouth, his throat, every inch of his body if he brings him through this the way he promised to.

Tomura kisses him again, but Dabi is sure he's doing it mostly to distract him from immediately protesting when his hips move away from his own again. But the kiss is good, beyond that, because his alpha's fangs have dropped, and Dabi realizes what that rumble in his voice must have been. The edge of command that he was trying to keep at bay as Tomura starts to fall into his rut right alongside Dabi's heat. He can't help but chirping and purring, wrapping his arms around his neck and arching up against his body to show his pleasure as his alpha proves exactly how badly he wants him as his hormones rush to meet Dabi's own.

The other moves over him for a second and then there's the sound of heavier fabric hitting their nest before Tomura is lowering his hips back between Dabi's legs again. His hands curl around his hips and he angles Dabi's body up a bit more so that he can rub the hot head of his cock through his slick and between his cheeks, before teasing against Dabi's hole. Whatever thread of sense was left in him frays apart in his hand at that feeling. Tomura is big. Anything is big against his hole that hasn't ever had something trying to push inside, and he is breathless as the worry that it won't fit comes rushing back. But the wave of lust that follows immediately on its heels drags him under the tide and makes him delirious.

Whatever tangled scent he's putting out, the tiny whimper that slips from his throat, has his alpha chuffing and nuzzling against his cheek. He licks his skin and that helps to soothe his anxiety a bit. "It's alright, firefly, do you want to start slower?" He shifts to get his hand back between them, bringing his fingers against his hole again which is definitely less intimidating, but not at all what his body wants. "Can open you up just like this. Have you bounce on your pretty toy until you're desperate to be full of my cum."

His instincts are screaming against his nerves, telling him that he wants that, not to be stuffed up with some toy. He wants his alpha's knot. He wants Tomura to be the first person he has inside of him. He wants to be good for his alpha and help him through his rut the way he promised he would help Dabi through his heat. The way he's been helping Dabi ever since he got here. It's so hard for him to find his words, but he has to manage it if he wants to do any of that. "Just want you, Tomu." His voice is weak and breathless, the need pulsing under his skin like a second heartbeat.

"Yeah?" There's no mistaking the possessive, pleased rumble in Tomura's voice as he says that. "Okay, baby boy, do you want me to help you relax? It will make it easier." He asks, nosing at his skin and scenting him as many times and ways that he can as he moves so his cock can rub against his hole again. He teases around his rim, both of their skin getting even more soaked as he does so, because Dabi's body is so close to getting what he needs and he can barely string together a coherent thought in his head. He doesn't manage to make a coherent word, just whining high in the back of his throat as he nods his head frantically, holding tight onto the other as he tentatively grinds his hips back so that he can feel him a little more as well. Tomura gives him another slow, deep kiss, and then he breathes, his eyes glowing so bright as they look into his, "Relax."

Dabi's muscles go so weak. He didn't even realize how much he was holding back, but he barely can keep his hands over the other's shoulders, and his legs fall open as wide as they can. There's a fresh gush of slick pouring into their nest as those internal muscles finally loosen from the perpetual tautness that has been plaguing him since he woke up this morning. He lets out a low breath and starts to purrs softly as Tomura starts to press inside.

He is big. He's so big, and his head is blunt, and he surely can't actually be made to fit a knot inside of him the way he saw those other omegas take it. But his body is helpless to try and tense as Tomura rubs against him a few more times, each rock of his hips teasing him with a little more pressure until his hole is being forced wider around him.

The moment that his head presses inside of him with a soft pop, Dabi sees stars. The pressure of having something inside is beyond anything he's ever felt before, and even just his head is so much and his instincts cry out how good it is. He hasn't ever felt this good in his life. Even his first orgasm can't possibly compare to how wonderful he feels having his alpha starting to open up his body and push inside. Tomura chuffs and licks at his neck, telling Dabi without words that he's still so safe, that he's not going anywhere, that he's going to keep giving his body this pleasure that he doesn't have words for. He is going to make him feel better and better, until he can't keep it contained anymore and he falls apart completely, and then Tomura will probably keep giving kisses to all of his scattered parts.

His alpha goes so slowly, pressing in inch by delicious, agonizing inch, and there are so many of those. Dabi didn't get a good look at him, but he would absolutely believe from how blindingly full he's feeling, that he's definitely getting more than eight inches of him. And by the time their hips are flush, they're both panting. Dabi's whole body is shaking, his eyes squeezed tight, some bubble of emotion in his throat that he doesn't have a name for as he's given what he needs. Tomura presses kisses to his face, over his forehead, his eyelids, along his cheeks. He purrs for him in response, and slurs around his own tongue that seems to have gotten heavier with his pleasure and heat,

"Shh, it's alright, firefly. You're okay. You're doing such a good job, baby. You took me all the way inside your very first time. Your body was made for this, precious. You're perfect."

Perfect. Dabi hasn't been perfect for such a long time. He thought he didn't believe in perfect anymore. But when Tomura says it, when he manages to open his eyes and look up at him, seeing his hair wild and mussed from how he's been pulling at it, seeing the flush across his cheeks that has finally brought life into his pale skin, his red eyes that are still glowing so brightly as he looks at him with no hesitation, no doubt, only a naked, searing affection-- Dabi can believe it again. Maybe not about him. But Tomura promised he would try to be a perfect alpha for him. Dabi isn't sure what else he could possibly do to prove he is like this. He doesn't know what the fullness behind his ribs is, but it's almost as distracting as the fullness inside of his hole, and the way that his body chooses to deal with the first is by forcing more bloody tears down his cheeks in a soft sob as he clings to Tomura.

"Alpha," he doesn't have to explain that he's not crying because he's scared, or because he wants to stop. Tomura can feel him, can smell him. He knows what Dabi means and he just starts to purr for him again, even louder, as he licks and kisses the bloody tears off of his cheeks like he doesn't have to be ashamed of his ruined body. He proves to him that he wants him anyway when he rolls his hips into Dabi's, moving his cock inside of him and making every inch of his desperate hole light up with the need to be filled even more.

"Let me love you slowly the first time," Tomura murmurs against his skin. "And then I'll give you anything else you could ever want for the rest of our cycles, firefly."

All Dabi can do is give a weak nod, more tears trickling down his cheeks. He doesn't think he's heard anyone use even the vaguest concept of 'love' when it comes to him in over a decade. He'll take as much of it as he can get from the other man right now though.

Tomura does go slow. He starts just by rolling their hips together in slow, undulating movements, teaching Dabi's body how to move along with them. Each one makes him a little more breathless than the last, the movements warming up his insides, getting them a little more relaxed, and not already clenching onto his cock so tightly when his knot hasn't even started to swell yet. He does it no matter how much he must also be wanting to fuck him hard and knot. He gives it to him gently because he wants Dabi's first heat to be enjoyable more than he wants to make up for the two unremarkable ruts he had before him. But when he's starting to whimper and try to make the soft rhythm a little more impactful, Tomura starts to draw his hips back. He slips a few inches of his cock out of Dabi's body and then rolls his hips again, sinking back inside. And oh! The pressure was good before, the rolling movements were so nice to stretch him open and made his insides feel warm and soft. But the friction of having Tomura's thick cock slide back as deep as it can go, that is delicious. Dabi keens, and the sound hitches on his breath, and then is nothing but a purr as he wraps his legs tight around Tomura's waist so that he can keep having that immediately.

Tomura kisses his skin so gently, kisses his lips, keeps making sounds that tell Dabi how good he's being for him, how good they're making each other feel. But he keeps their pace slow, like he said he would. He doesn't pound into his hole the way they watched the other alphas do to their omegas in the videos. He just gives him his cock slowly and perfectly over and over again until there is nothing but their pleasure cycling between their bodies.

Dabi's second orgasm feels so different from his first as it builds in his body. The health video said that the internal stimulation would pull the attention from his cock, and it absolutely has. He's sure he would be complaining about how long he's been so hard if it weren't for the fact that every measured thrust inside of him is turning every muscle in his body into liquid heat as his pleasure builds under his skin until he's sure that he's going to erupt. But he isn't going over the edge. It's like Tomura is holding a lid over that peak, and he is absolutely helpless not to obey and wait for him as he tries to get more.

He doesn't understand what he was making him to wait for until he starts to feel his hole being forced to stretch a little wider again as he feels his alpha's knot start to swell. "Are you ready, firefly? I want to make you mine so badly. Want to have my spend soaking your insides, want your slick to smell like me for the rest of your cycle. Want to see you crying as you cum on my knot as I push inside." Tomura's voice is so thick with his own arousal, his growls and purrs slurring the words, his fangs glistening, and eyes still ruby red as he speaks.

Dabi doesn't have words for how badly he wants that too, but his body is able to answer for him, a fresh gush of slick going across his thighs to help open him up even more for his alpha's knot, as he feels a pain in his jaw for the first time as his own fangs drop to show his alpha he doesn't just want his knot, but that he would take his bite as well if he deigns to give it to him.

Seeing his teeth like that seems to strip away the last little bit of Tomura's measured control. He can't help the snarl he lets out, the sound demanding, possessive, and good instead of frightening. A sound that tells Dabi that he's so completely and deeply wanted that his alpha would kill anyone who might ever be stupid enough to try to take Dabi away from him. He kisses him hard and their fangs click, and their lips bleed, and that tangle of their blood on their tongues might as well be a drug from how high it sends Dabi into the clouds. He doesn't think that he'll ever have words for how perfect he feels like this. Even more perfect when his alpha builds their pace. Dabi holds onto him tighter, meets each one of his harder thrusts that has their bodies making obscene sounds as they move.

The moment that Tomura's knot forces its way inside of him, swelling completely as he starts to cum, Dabi's nails tear through his back as he arches hard and cums with him. Stars explode through his body, that eruption actually a series of supernovas going through him as his alpha makes him feel so good that Dabi is certain without the cuffs, he would have become a sun from how he feels. His walls clench down so hard on Tomura's length, letting him feel every perfect, pulsing inch of him as he cums so much. Dabi has been soaked practically all morning, but nothing could possibly have prepared him for feeling the way that this does, now that he's being filled with the other's seed instead of just having his slick rush out of him. There's so much of it, it makes him feel blindingly full, and it is so satisfying in a way that his animal mind can't possibly articulate. He just knows that he's supposed to be satisfied. That he's supposed to feel like his purpose has been met and be ready to settle and cuddle for a while until they unlock.

But Dabi wants it even more, and he's barely noticed that he's spilled his own cum between their bodies for a second time before he's starting to roll his hips again. Tomura chuffs at him, the sound absolutely amused. He can't thrust inside of him the way he was before. Not when he's locked inside. But he can do that good rolling thing that they were doing before.

"You want more, precious?"

Dabi manages a nod, and Tomura gets a hand under the small of his back and uses a strength that Dabi didn't know he had to lift him. Tomura lays back in their soiled nest and gets Dabi's knees wide around his hips, pressed into the bedding. "Okay, firefly, find what feels good," he murmurs, his eyes still glowing and his own arousal not fading in the slightest. "If you do a good job, I'll get to fill you up again without even taking my knot out of your pretty hole. Won't that be nice, baby boy? You'll be so full of my cum." He moves his hand to Dabi's lower abdomen, not minding the cum that gets smeared obscenely over his gloves. "Mm, maybe you'll get so full that I'll be able to see it."

That has no right to make him so blindingly needy so immediately on the heels of his last orgasm, but Dabi can't do anything but keen and start to try to work out how much he can actually fuck himself on his alpha's cock before his knot shrinks.

///

The rest of their cycle is a blur for the most part. Dabi just knows that he felt perfect, that Tomura took such good care of him, that he made sure he ate even though all he wanted was to mate and sleep. That he held him close and kissed him. that he never once tried to bite him, no matter the fact that Dabi essentially used his throat as a chew toy after their first round because he wanted Shigaraki to own him so badly. But he didn't let his neediness sway him. He also has the vague memory of being stuffed full of the dildo and his alpha's cock at the same time and how good that felt too, how his alpha called his hole so greedy even though it was his first time, and how that embarrassment had just made everything feel even better. But he doesn't think about that too much when they come out of their cycle.

What he thinks about instead is the fact that Shigaraki doesn't pull away. He helps Dabi clean up his space and remake his bed. He orders them a bunch of food and then they both go into the shower together and wash each other's hair and skin until they're clean. He brings Dabi right back to his now clean bed once they're dry, and then he slowly and meticulously scents every inch of Dabi's skin, and lets him do the same. Then he holds him close and lets him lick and nuzzle at his throat, purring all the while until their food arrives. Tomura makes sure he eats every bite of what he needs to make up for all the activity, and in a day or so, when their hormones have cycled lower, and Dabi admits that he's dreading having the examination that he was told he would have to after his heat, Tomura asks if he wants him to come with him.

He holds his hand the whole time, and gets Dabi bitching and arguing with him over nothing to distract him from how vulnerable he feels laid out on the doctor's table.

///

"That's dumb as shit, Shigaraki." Dabi snaps as they debrief with the others.

"Toga--"

"Already has an assignment. If she can get the blood of as many students as she can, then we'll be in a way better position to infiltrate the school later on, either by using her, or Twice's doubles. Unless your almighty teacher is going to actually disclose who the spy he has in UA actually is?" He challenges. He swears to god that Spinner and Compress have backed off a little from the table, but he doesn't give a shit. If they think that this is going to escalate and want to be pussies about it, then that's on them.

Shig scratches at his neck, his mask on and hiding his expression from Dabi, but he knows that the other man isn't pleased. But he made Dabi the leader for this job. He's going to lead, and he's going to prove that no matter how much time he was absent from the training with the others, that he's not weak. He's back, he's better, he absolutely deserves the position that Shigaraki has given him, and not just because all of them know he's taking his knot as often as he can get it, even with their cycles over. "Fine."

Dabi tries not to be too smug over that and goes right back to laying out where the others will be when they hit the summer camp.

By the time the meeting is done and Dabi has done the requisite socializing with the others, he's more than ready to be back upstairs in their room. Duster still technically has his own room, he still pretends to sleep there when his teacher calls and asks how things are going, but not five minutes after Dabi's inside, the door is opening again for his alpha, who steps inside and immediately pulls the hand from his face. It soothes him immediately to see his face again. He got so used to being able to see him, that whenever they're doing villain shit with the others and he's hiding, Dabi feels an uncomfortable distance between the two of them.

But Tomura looks at him, and he's not frustrated with him snapping or talking back to him during the meeting. He knows exactly what to expect from Dabi at this point. He just looks lightly chastising as he steps into his space and wraps his hands carefully around Dabi's hips. Dabi starts to purr immediately as he leans in to get his kiss, but Tomura doesn't give it. "You skipped your afternoon snack, firefly."

"Moonfish was having one of his, and it put me off my appetite. Figured we could make up for it tonight and order something terrible."

Tomura hums and gives him his peck then. "Yeah? Terrible how?"

"Something super greasy and bad for us so we end up not wanting to move for the rest of the night." So they can curl up in his bed together, cuddled close while Dabi watches Tomura play his games and he gets to feel cherished the way that Tomura hasn't stopped letting him feel since their cycle.

He gets another kiss and a soft purr out of his alpha too. "If you wanted pizza that badly, you didn't have to make an excuse, baby boy. You want potatoes on it?"

"Yeah," he doesn't need to stay in Tomura's space, he barely let him even get into the room, but he likes being close, and his alpha doesn't seem to mind, letting him tuck his head against his shoulder so that he can breathe in his scent like he's been starving for it all day. "Thanks."

"Anything for you, firefly." He presses a kiss to Dabi's temple, and Dabi lets his own purrs start to rumble quietly between them. He knows that. Tomura will do anything for him, and at this point, Dabi is pretty sure that despite all of his good sense, that sentiment goes both ways.

He enjoys this closeness for every second he can get it, only relenting when his stomach growls, and then, as soon as they've actually ordered their food, they're settling into the bed to be close again until it arrives. He thinks that he might not be the only one who was a mess before he got here, but he's just glad that they're both so invested in getting back on the right track. Just glad that he has Tomura with him, because he doesn't think he would be able to enjoy being an omega as much as he does now if he didn't have such a perfect alpha right beside him.

Thank you so much for reading! If you enjoyed, please consider leaving a comment/ask!

#shigadabi #my writing #mha fanfiction

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