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cursingtoji · 2 years ago

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𝐂𝐨𝐧𝐬𝐞𝐪𝐮𝐞𝐧𝐜𝐞𝐬 — 𝐃𝐞𝐯𝐢𝐥!𝐒𝐮𝐤𝐮𝐧𝐚

part 2 of Sweet Sacrifice

summary: Chainsaw man universe where humans can form contracts with devils in exchange of sacrificing something valuable.

cw: chainsaw man spoilers (anime only), self insert into csm canon, reader is in love with Aki, dub-con, heavy oral (f -> m), deep throat. choking, bruises, spit, failed attempt of masturbation, Sukuna has a normal human form (at least for now), reader goes into Sukunas domain, as per the last chapter reader is a virgin 4k words.

note: this was very fun to write, quick info… for reasons of “just cause” himeno is not into aki in this series. also i have plans for the next chapters but feel free to speculate

After the last mission with Aki you felt like everyone at the public safety building looked at you weirdly, like they were trying to understand how a not so skillful hunter finished a strong devil by herself.

Aki thankfully taught you to not share too much about your devils and the contracts, so you knew how to defend yourself if anyone asked you about Sukuna.

“Makima-sama wants to see us” Aki said, joining your walk.

“Great” you mumbled ironically but followed him anyway.

Aki knocked and you heard Makima calling you in.

After a quick greeting she started asking about the report from your previous assignment together. You haven’t read it before Aki submitted it so you allowed him to confirm the information.

“...So you summoned Sukuna with a cursed word and he appeared beside you?” Makima asked you directly.

That was not what happened. Sukuna took your body. Aki would not lie about this, but you know the actual truth is not what he would’ve written as well. Having Sukuna taking control of your body was a huge risk for the public safety, the type of risk that could get you executed like a devil.

“Actually—“ he started.

“I’m not asking you” her eyes did not leave yours.

“No, my contract with Sukuna allows me to use his strength as it was my own, he does not manifest physically as another entity. If Hayakawa wrote that, my apologies, he was hurt and probably confused, I should’ve explained better” you took the fault knowing that Aki did not write what Makima said.

“Very well” she seemed pleased with your answer and you could hear Aki exhaling relieved, “What did Sukuna take?” the question got you in alert mode. That was your superior asking. What should you say? Would she know if you lie?

“Makima-sama, with all due respect, I don’t think she needs to disclose that information” your eyes widened, you never saw him standing up for Makima like that.

“It’s nothing that’s gonna be missed,” you added, not wanting Aki to suffer any consequences.

“Fine, congratulations y/n, thanks to your new contract you have an offer to join the 3rd division.”

“What?” Aki and you said at the same time.

Makima slid an envelope to you.

“They need an answer till the end of the week, you may go now. Hayakawa you stay” you bowed, still a little confused and left the room not without exchanging a look with Aki, “Leave the door open” she ordered.

On your way out you saw a blond kid waiting outside, upon hearing Makima's voice he quickly fixed his posture and entered the room.

You haven’t even taken the offer and Makima was already replacing you as Aki’s partner. Bitch.

You went back to your desk, and found that week’s patrol shift. Today you were by yourself, patrolling a chill area and replying to the radio channel which the local police uses to call for public safety back up.

You sighed, knowing this day was gonna be long and boring. Leaving the building, you decided to walk to your area, using a path Aki and you would always take. Before you got to your destiny, something drew your attention to an alley. It was the middle of the day, you doubted a devil could be there, either way you carefully approached the source of the noise and recognized Aki’s voice.

Hiding behind an irregular wall you listened to the conversation. You couldn’t see them without them seeing you, but it was obvious he was beating the shit out of someone, you assumed it was the skinny boy from before.

“Makima-san is not the kind of woman a punk like you should be chasing” followed by the indistinguishable sound of fist hitting a face.

“Sounds to me you like her too” the boy replied. You felt your heart sinking.

Why was Aki defending Makima? So what if that newbie wanted to be her new dog? To hell both of them…

But why does Aki have to get involved? You wanted him to defend your honor and only you—

What honor?

You heard that familiar and yet strange voice inside your head.

You swallowed your shame and left the alley, wanting to focus on anything but Aki.

It’s not like you could have him anyways.

“You greedy asshole” Denji kicked Aki’s balls once again, “I saw you partner, what else do you want, huh?” he kicked again, “You get to hang out with a hot chick like that everyday and you’re giving me shit for wanting the same with Makima? Fuck you” before he could give another kick he saw Aki wasn’t getting up, “Shit”.

Two days later, when the sun was setting you ran into Aki when you were leaving a house after finishing executing a small devil. He was talking to the cops outside.

“Hey, I beat you on this one” you smiled at him.

“I heard you replying the call on the radio” he defended, “Just wanted to come by in case…”

“In case what? In case I couldn’t handle it? Please, that devil was the size of a pigeon” you made a sign to the cops that it was done.

“So, do you miss me already?” you teased him.

“In comparison to those two I miss you every hour of the day” he threw that statement unbothered, it was enough to make some blood rush to your face.

“That’s right, you have a fiend now as well” you giggled imagining how Aki dealt with the fiend, he confirmed with a grumpy face.

“Have you accepted the offer?” he asked.

“Oh I forgot about it” indeed you haven’t even opened the letter yet, “I’ll take till the end of the week.”

“Why?”

“I’m just not thrilled to work with a bunch of freaks.”

“That's basically what division 4 is now” you laughed and he smiled.

“They are living with me, you know” Aki picked up a cigarette and lit it up, you watched waiting for him to continue, he took a long drag and extended the cigarette to you, “Power, the fiend and Denji, the Chainsaw”.

“Chainsaw huh…” you wondered, “Why though?”

“Makima-sama asked me to” you felt that weird tightening in your stomach again.

“You’re an idiot.”

“I guess I am.”

Since you haven’t given an answer to the offer yet, Makima put you with division 4 on a mission the next day to recover a piece of the gun devil in a hotel. There you got to meet the new members and saw your senpai, Himeno.

“They don’t look so bad” you whispered to Aki, he even got the devils to call him senpai… after a bribe but whatever works.

“Give it some time.”

During that week so far you have been feeling weird, ever since that night with Sukuna actually, if you can even call it that. Every night after a stressful work day you recalled that event, silently expecting him to show up again, but nothing. So you managed to drift your focus to something else, by now that tactic has only made you more and more horny.

“…will give you one as well” your attention was drawn back to the current situation when Himeno said your name and put an arm around your shoulders.

“What?” the team was looking at you weirdly, especially the Chainsaw boy, “I’ll give a what?”

“A kiss to whoever defeats the devil.”

“Not a chance.”

Denji started to talk about how he already decided who he’s gonna kiss.

“…when it comes to sex stuff it feels way better when its with two people who get each other.”

You couldn’t hold back a scoff/laugh, it was automatic given the situation you were in, no one seemed to have noticed your reaction but when your eyes met Aki’s looking at you weirdly you decided to put an end to that subject, Himeno seemed to have convinced Denji anyways.

“Let’s go” you called and all of you entered the building. The rookies leading the way meanwhile the three of you stayed a bit behind.

You let your thoughts wander, thinking about what sex would feel like with Sukuna.

Next time I won’t be so good.

That’s what he said last. You have no idea what he meant by that, or what to expect next, but something made you think you were gonna find it out soon enough.

A couple minutes later chaos seemed to have taken over, power killed an ugly fucking walking head, then you all got stuck inside the 8th floor, Kobeni was crying and trying to drink toilet water, Denji was sleeping like a baby. After looking around you gave up trying to find a way out and simply layed on a bed in an empty room.

“Could’ve been worse” you murmured to yourself. You seem to have all this time and nothing to do.

The bed was pretty comfortable… your core still burned, would it be too bad if…?

You slowly brought your hand down your uniform till your finger found your clit over the material of your trousers.

You sighed, felt good, you needed some release. You closed your eyes, circling that spot and thinking of that night when Sukuna had control, but instead you imagined Aki to be one touching you and—

“AARGH” you screamed louder than you should’ve, a sudden sharp pain in your lower lips had taken you off guard. When you looked down you found Sukuna’s mouth in your palm “Did you fucking bite me?!” you accused. He clearly bit you through the pants.

“When I told you I was gonna be the only one touching I meant it, not even you can touch yourself got it?”

“That’s ridiculous I—“ your left hand seemed to have transformed into his again, bigger with sharp black nails, he went straight for your neck, choking you.

Down the hall you heard Aki calling your name, he probably heard your scream and was now opening every room to find you.

You panicked, not wanting him to find Sukunas hand around your neck.

“Sukuna” you begged.

“That’s not my name.”

“M-master please…”

“Say you won’t do it again” his grip tightened, cutting your breath, Aki’s voice was closer.

“I— won’t— I p-promise” you chocked out.

Right when he let go of you and you gained the control of your hand back again Aki barged in.

“What’s wrong?” he rushed to your side on the bed, putting his hands on your shoulders to take a look at your face while you coughed.

You managed to come out with a lie about having a nap then waking up from a nightmare and choking with nothing. He didn’t seem to believe it but didn’t ask anymore questions thankfully.

“I need smoke” he got up from the bed, “Come” and took your hand making you go with him.

You hated to lie to Aki, it was necessary, but whenever you felt his skin touch yours like that you almost felt like giving up on everything, on Sukuna, on being a hunter…

“Himeno-senpai, do you have any cigarettes left?”

“I want one too” you added

“Sorry, that’s the last one,” she replied.

Both you and Aki asked for it, Himeno gave him first then he gave you. You realized how close you were to each other’s faces when Denji screamed “indirect triple kiss!” you giggled while Aki told him to shut it.

More time had passed, you have no idea what time it is but you really wished you had taken a nap. Now, Himeno, Aki and you were lying on the hall facing the huge disgusting blob the devil had become.

Himeno asked Aki if he had a plan, he always had a plan, but this time the only thing you were certain of was not killing Denji since that’s what the devil wanted.

“I’ll use the sword” your heart skipped a beat, you quickly protested it as well as Himeno.

“I’ll use Sukuna first” you argued.

“Who? What’s that?” Denji asked.

“That’s one of the devils I have a contract with—“ you started to explain but Aki cut you off.

“He’s not gonna be useful here. If that thing doesn’t have any weakness there’s nothing Sukuna can do.”

“Oh and what can your sword do?” his words made your blood boil, was he trying to underestimate your contract with Sukuna? Underestimate you?

“Oi, no fighting” Himeno interrupted, but before you could continue Aki got up, taking you with him by your arm before the devil moved in your direction, then you were running.

Fuck, you needed to do something.

The whole floor starts to bend in the devils direction, you found a stable place in one of the rooms, Kobeni was screaming about throwing Denji to the devil.

“I’ll use the sword” Aki said and you got the cursed word to summon Sukuna on the tip of your tongue.

“I’m not gonna do it” he said from inside your head.

Fucker.

“Himeno” you warned her, Denji was not about to become devil food, but you also didn’t want Aki to lose years of his life by using the sword.

“Die!” Kobeni screamed and ran towards Denji with a knife.

“Enchain” you called.

You lost consciousness for no more than 5 seconds, but when you came back Kobeni was on the floor, a bloodied knife beside her and—

“Aki” you whispered nothing but the pool of blood coming out of him “Sukuna… what the fuck”.

“You called too late little hunter, that was not our deal, you’re gonna pay for it” he replied in that voice only you could hear.

You kneeled beside Aki while he defended Denji and Power tried to manipulate his blood, when she touched him he flinched and reached for the closest thing that happened to be your hand.

Himeno was freaking out, the Kobeni again, until Denji got up.

“If I manage to kill this fucking devil, I still expect to get that kiss” he screamed at Himeno but looked at you too before explaining his plan. That boy was deranged, but you liked him.

So long have passed, Denji was still slicing the eternity devil, Power really seemed to have stopped Aki’s bleeding, you managed to not fall sleep while laying beside him, you wanted to make sure he was still alive, so you keep waking yourself up.

“Hey” he murmured, “you have awful eye bags.”

“I would punch you if you weren’t stabbed” you murmured back. He adjusted himself getting closer to you, he was pale but not as much as when he got hit by the knife, “I’m glad you’re okay” you placed your head on his shoulder.

“Can he hear us talking?” he whispered.

“Who?”

“Sukuna” you looked up.

“I don’t think so” you replied, Sukuna only seemed to be around when you were by yourself or in a stressful situation.

“I saw him” Aki moved some hairs away from your face, “When you said the word, I saw your features change, your eyes got darker, he didn’t do anything, but he smiled when I got stabbed, you smiled…” your eyes widened.

“I’m sorry, I should’ve done something myself” your heart broke, Aki sounded so fragile.

“It’s okay, I’m fine” he placed his arm on your shoulder, resting his cheek on your forehead, “Can you promise me something?”

“Maybe, what?”

“If you don’t feel safe with Sukuna, terminate the contract.”

Safe…

“I’ll think about it.”

Thankfully Denji was right, he managed to defeat the devil by himself, freeing everyone else from the 8th floor. While Power was holding Aki on her back, you approached Denji.

“You must be exhausted,” you murmured.

“It’s not so ba—“ you gave his cheek a peck when he wasn’t looking at you directly.

“Well, you deserved it so…” before you finished he fell backwards, but Himeno got him when he was about to hit the floor.

“Let’s get them to the hospital” Himeno said and you agreed.

With Aki and Denji spending the night in the hospital for observation, you decided to go back home and check on them the next day.

Home seemed to embrace you when you arrived, finally having your own food and a decent shower.

After a long time washing your body and hair you stepped out of the shower with a towel wrapped around you, but the second your toe touched the ground you heard a voice

“Enchain”.

And everything around you changed like you were transported somewhere else.

“What the…” it seemed like a dark cave, looking down you seemed to be standing on a wet floor, was that blood? It didn’t smell like blood, although the place looked like it was rotting it didn’t smell like anything weird. There were bones around, piles of them, and a huge spine above you.

“Don’t look around without permission” you heard him again, behind you.

“You—“ when you turned around you met his naked chest.

Only then you realized you haven’t seen Sukuna in a human form since your contract, you forgot how tall he was. He was wearing a white robe, tied around his waist, from that point up his torso was exposed, black lines adorning it.

You took a step back, raising your head to look at his face, he had an obnoxious smile and a look of superiority.

“Where the fuck am I?”

“In my domain, basically in my mind” he turned around and sat down on a throne made of bones.

“That explains why this place is so creepy... How do I get out?”

“You can’t until I say so.”

“Suk—“ you rolled your eyes and was about to say his name in a very disrespectful tone until you met his serious face, “What do you want?”

“Do I have to remind you of our deal? You said Enchain, now you gotta pay.”

“You did nothing” you crossed your arms, “I may have said it but you failed to keep your word.”

“Watch your mouth, hunter. Contracts have power, if I hadn’t held my end of the deal I would’ve suffered the consequences, but here we are. If that dumb head of yours wasn’t so busy thinking about getting fucked you would’ve realized that was nothing for me to do in that situation”

You opened your mouth to argue back, but quickly realized you were in no position to do so.

“Whatever, let’s get this over with” with that he pulled the only thing that was covering your body, the white towel, and threw it away.

You attempted to cover yourself, but he pushed your shoulders down until you fell on your knees in front of his throne.

“Sukuna, not here” whatever was under the wet ground was rough on your knees, and the whole setting made you uneasy. All the skulls laying around seemed to be watching you.

“I said I wasn’t going to be good, especially after you misbehaved so badly earlier. Tell me, little hunter, have you used that mouth of yours to something other than pointless arguments?” Sukuna leaned back on the throne, spreading his thick legs and undoing the knot on his robe. The angle you were in gave you a pretty good look on what you were going to be working with.

If there was a source of light behind Sukuna you would have his dick casting a shadow on your entire face.

“Sukuna…” you called his name in scared tone, all your confidence fading out as you noticed from up close the thick veins.

“Do I really have to teach you everything?” he pulled away from the throne backrest getting closer to you, roughly taking your wrist and turning your palm up.

When you met his eyes he had a mischievous look, he snorted leaving you wondering what about your expression he found funny.

Then he spited in your palm and made you wrap it around his length.

You couldn’t help but gasp, such a dirty act and still your thighs were pressed together as hard as you could to get some friction on your core.

You had no idea what the average size was, but Sukuna was definitely above that. Your fingers weren’t even close to touch, how were you supposed to…?

“Come closer” he spread his legs, Sukuna was back to his original position, back against the rest, looking down at you like you were a bug. You noticed the frown was gone, like he was more relaxed.

You obeyed, moving more into the middle of his legs your face now just inches from his dick.

His hand guided yours up, stopping before the head and going back down encouraging you to squeeze his base, his chest was rising faster as you learned the way he liked it. You approached the dark red tip, giving it a kitten lick to test waters, a satisfied groan from the devil made your face heat up.

“Don’t be shy” he placed his hand on the back of your head, pushing you down his hard cock as you put your hands on his thighs for support.

Sukuna pulled you back before he hit the back of your throat, when your lips reached his tip you sucked it and felt his hand closing and pulling your hair.

“Liked the taste?” he teased. You would never admit it out loud… but you did. The bitterness of it and his scent made you high.

Being a virgin you didn’t expect a cock to be so hot. Literally. You felt your cheeks burn just being this close to his hot skin.

Your tongue traced the underside of his length, the warmest point of him. Out of curiosity you reached for his balls too, they ehere even hotter and so heavy.

Sukuna adjusted his hips, tilting it a little but enough to make you gag on it.

“Open wider” his rough hand held your face, index and tumb forcing the sides of your jaw to stretch more. It hurt, you wined, sinking your nails on his thigh, “Relax…”

You’ve read porn before, you know what you’re supposed to do, in theory.

“I need to buy cigarettes, you can wait here” Aki told you when you reached a convenience store.

“I’ll go in with you” you replied, while Aki went to the counter you walked to where the maganize were. You picked the newest edition of a popular one, flipping through it you found an interesting article. It was a reader question for the recurring sexologist. My husband never comes when I suck him off, what should I do to improve my head game?

You brought the magazine closer, not fully reading the answer but just scanning your eyes over the words that stood out the most.

Create a vacuum by pursing your lips… focus on the frenulum… suck the balls… swallow when it reaches the back of your—

“You buying this?” Aki was suddenly beside you, your head was basically inside the magazine, thankfully shielding the content.

“No, there’s nothing good” you closed it quickly and put it back.

You should’ve come back for that.

Taking a deep breath you tried to relax your throat as Sukuna applied pressure to the back of your head, as soon as his thickness reaches the very back of your throat your eyes fill with water.

“That’s it, choke around my cock, little hunter. Allow me to bruise that throat of yours” he thrusted his hips and you realized you have almost no control over it anymore, just to surrender to the situation. A mixture of liquids accumulated on your chin, almost dripping.

Sukuna loved this more than he should, you looked so helpless. But those eyes didn’t deceive him, he could see the lust, the hazy look and your delicate hand under his balls told him the secrets you didn’t.

“You’re such a whore, you know that?” you swallowed, “You know why?” he bent, one hand still on the back of your head and the other around your neck, he pushed you until your lips were amost at his base. All the heavy meat of his cock down your throat.

Your teary eyes tried to look up at him, the hand on your neck closed around it, Sukuna could feel his own shape there. You eyes widened realizing you could barely breath.

“Because good girls don’t take dick like this” he trusted a few more times until you felt it twitch, your hair was aggressively being pulled but the hand around your neck kept you in place while he shot hot loads down your mouth.

“Eat it” he commanded and you obeyed, shutting your eyes and swallowing it, although it was a lot.

Sukuna pulled you away, mesmerized by the string of cum and saliva connecting your mouth to his cock.

You inhaled for the first time since this started but soon began to cough, your jaw ached and your legs were numb beneath you.

“Monster” you managed to murmur in a extremely husky voice.

“Please” he was catching up his own breath, through blurry eyes you could see his abdomen was sweaty, his thigh was trembling. Sukuna bent, supporting his elbows on his knees to get really close to your messed face, his huge hand approached your face and out of reflex you fliched, but with a delicacy you would never expect he removed the strands of your hair that got caugh in your wet face. The sudden act made your face soften, he ran a thumb over your swallowed lips, rubbing the saliva off, he looked at you with a proud smirk. You felt vulnerable at that moment, his eyes didn't seem dangerous, and he was so close you couldn’t help but close your eyes and reach for a kiss.

You found nothing.

Opening your eyes again you saw the tiles of your bathroom, finding yourself naked on the floor. Droplets of your wet hair ran down your back, you took your towel off the floor and wrap it around your shoulders and attempted to get up, groaning from the pain on your knees. The groan scratched your sore throat and you started to cough again, moving to the sink you lowered your head trying to get some water but the image in the mirror scared you. There was a clear imprint of a hand around your neck, you traced it in shock. You thought about what to say tomorrow at work, should you wear a scarf?

But the most important question was: how deeply involved were you with Sukuna now that he had literally marked you?