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bunnykawa · 4 years ago

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what are you doing, step bro? (sakusa x f. reader)

summary: To your parents, Sakusa was the greatest son. To you, he was the best big brother you could’ve ever asked for, but you could only find that out with a little force.

a/n: i literally just started college so i won't have much time to write but i have some stories in my drafts that'll be posted in awhile lol. should i open requests for haikyuu drabbles since they're short but still entertaining?? idek i feel like no one is reading this rn LOL but if anyone is reading this, lmk ;)

(edit: I HAD TO REPOST THIS CS IT WASNT SHOWING UP IN TAGS so sorry if you already liked this post)

warnings: 18+, incest, mentions of drugging, mentions of somnophilia, mentions of parental neglect, noncon/dubcon/rape, sakusa is a dirty pervert i just don’t know how else to tag this, degradation, slight manipulation

"(Y/N), this is your new big brother, Kiyoomi," your mother said, holding tightly onto your small shoulders as you stood in front of her.

"You can refer to him as your nii-san from now on." Locking eyes with you was an older boy with long black wavy hair, two moles on the right side of his forehead, and a white face mask on the lower half of his face which blocked his nose and mouth. How odd, you thought. You could tell he was disinterested with how his eyes were blank as he stared at you.

That was the first time meeting your step brother, Sakusa Kiyoomi.

Being four years younger than Sakusa, you two never really got along. Of course you had to respect each other, but there was nothing to really talk about other than when his volleyball games were or unfulfilling small talks. Sometimes he would make snide remarks, asking if you even showered when your hair was only slightly messy or if a smart word ever came out of your mouth when you stumbled over your words. Sometimes he was just mean to you in general to the point where you would cry. You always tried to ignore it, though. That was when you were younger. You couldn’t help that you weren’t that smart and he was your nii-san after all. Your parents would brush it off.

You celebrated his victories together, only because you had to. I mean, you were the younger sister of one of the nation's top three aces in high school volleyball. There was no way your parents wouldn't celebrate. He was their pride and joy.

Smart, athletic, incredibly attractive — everything you felt like you could never live up to.

Your own biological mom so obviously and painfully liked him more than you.

Before you even entered high school, Sakusa was old enough to move out and go to college where he continued to play volleyball. When he visited during the holidays, you still wouldn't have decent conversations with him. He would still insult you. It even made you cringe when you had to call him nii-san. Why address him as your older brother when he didn't even act like it?

But you dealt with it because you had to.

Fresh out of Itachiyama Academy, you're focused on studying for entrance exams for colleges in your area rather than what would happen if you ever had to see Sakusa again. But, you were expecting to see him very soon.

Gentle knocks are heard from outside your door and before you can respond, your mom is already opening it.

"(Y/N), Omi is coming today and he's gonna be here for a week. I have to go to the grocery store to buy food and I'm gonna run other errands so it's gonna take awhile," she says, leaning her head into your room. You respond multiple times with "okay" so she can leave your room sooner.

Textbooks and notebooks are strewn across your bed with you on your stomach, trying to cram as much information in your head as possible.

"That means I might not be here in time for when he comes, so you have to open the door and greet him," she adds.

"What about dad?" you ask with a grimace. The most you would do is say hello and scurry back into your room.

She rolls her eyes at you. "He's working late again. You know that, (Y/N)." With a sigh, you agree and she finally leaves your room after bidding you a "goodbye."

You can't remember the last time you saw Sakusa, but it was probably almost half a year ago. Ever since he left for college, your parents were even more distant towards you. They probably felt like they didn't need to worry about you because you weren't doing anything important.

When Sakusa came over, he barely acknowledged you and you were okay with that because it meant he wouldn't be bothering you.

But that didn't mean his blank stare wouldn't catch your attention whenever you came out of your room to eat or use the restroom. The atmosphere felt...very odd around him. You couldn't necessarily come up with a reason why.

Suddenly, you hear knocking on the front door. It had to be at least an hour or two since your mom left and the thought of who was waiting at the door made your stomach churn.

"Nii-san is here," you mutter to yourself as you got up to open the door. Right as you open the door, Sakusa was staring down at you with the same blankness in his eyes from before with his usual face mask. His hair was shorter than you remember.

Mindlessly, his eyes seem to scan your body before returning to your face, making you feel self-conscious. You were only wearing black spandex shorts and a loose tank top. Subconsciously, you rub your arm and step back to make space.

"(Y/N)," Sakusa acknowledges you in a deadpan voice. It's no surprise to you.

"Hi, onii-san. How are you?" You try so hard to be polite, but Sakusa seemed to have a naturally dominant energy that overwhelmed your senses, even if he also seemed to have the personality of a jar of mayonnaise. You step aside so he can come in. He wore gray sweatpants and a black windbreaker that was zipped up all the way. As soon as he makes it inside, he removes his face mask, stuffs it in his pocket, and starts unzipping his jacket.

"I'm good," he hums, "Where's mom?" He places the backpack he was carrying on the couch and takes a seat as you close the door.

"She's out doing errands and dad is working. Do you want some tea?"

"Yes, please. Make sure you wash your hands before you do. Thank you," he said. You walk into the kitchen, muttering "germaphobe" under your breath at his extra request. Unbeknownst to you, he watched you from his place on the couch as you walked around the kitchen, pulling the tea kettle out of one of the bottom cabinets and looking for cups. His gaze followed the outline of your ass in those tiny shorts that hugged your bottom tightly.

"What college are you planning on going to, (Y/N)?"

"I'm not sure yet, but I'm applying to the college you're going to and three others," you replied from your spot near the counter.

Sakusa actually perks up at your answer. "Oh, cool. You'll love it there if you get in. Only if, though. You're not the brightest."

You couldn't help but let your face fall in a frown at his seemingly small comment. Quickly, you compose yourself and brush off his remark. You got the water boiling in the tea kettle and reached high for the teacups that were sitting on the top cabinets. Your stepdad definitely put them up there.

A presence looms close behind you, which makes your whole body automatically freeze and tense up. A veiny, bulky arm reaches up easily to grab the teacups while another one snakes around you to pull your tank top down as it was exposing your stomach. You're not sure if you're imagining it, but you definitely feel something stiff brushing up against your back.

"You need to be careful. Don't wanna hurt yourself, do you?" Sakusa commented, leaning forward so his mouth was right next to your ear. A blush found its way onto your cheeks from feeling him so close to you.

He usually hated being so close to people. What was so different today?

"R-right," you stuttered, "Thank you, nii-san."

Confrontation wasn't a strong trait of yours.

You guess that moment was when it started getting really weird between you two. You still had small talks from whenever he would actually see you come out of your room, but you wanted to avoid him as much as you could. However, that was hard when Sakusa insisted that you drank tea together every night and, of course, your parents insisted, too.

Your nii-san wants to spend more time with you, they would say excitedly. Better late than never!

Maybe if he was showing the slightest bit of interest in you, your parents would finally care about you. So, with much hesitation, you started drinking tea with your step brother every night. Sakusa even made the tea himself so his poor little sister wouldn't tire herself out with carrying that heavy teapot.

You're still not sure if you're imagining things, but the tea tasted different from how you made it. And you swear that the tea didn't make you so sleepy after drinking it until he started making it.

"Come here," Sakusa would say with a smirk, "Onii-san will take you to bed."

You would pass out before you even made it to bed, but every morning you woke up with sticky thighs, only blaming it on sweating while you were sleeping.

Until one day, you didn't drink all the tea that he made you. You still fell asleep, though. Your brain was hazy enough to make you lose consciousness as he helped you up from your seat in the kitchen.

Sakusa laid next to you on your bed. You were placed on your side so he could slide under the sheets right behind you to press his hardened length against your ass. This was his favorite part of the night. He spent a few minutes playing with your cunt to make it slick enough for him to let his cock break through your walls.

You barely stirred awake. Didn't even move an inch as he caressed every part of your body, from your soft nipples to the sensitive nub between your thighs.

He pushed the elastic of his sweatpants down to his thighs quickly. His cock hit your ass before settling between your folds. A satisfied moan leaves his lips when he feels your wetness coating the top part of his shaft as he rubbed it against you. He hooked his arm around one of your legs so that you were spread open enough for him to fuck you and rub your clit at the same time with his other hand.

He wanted that sweet nectar completely coating his dick. He remembers the way you tasted and how you came on his tongue the night before, despite being blacked out from the little pills he would dissolve in your drinks. You tasted so clean and smelled so fresh. It was impossible for your nii-san to control himself around you.

And when did your ass look so good? God...Sakusa couldn't believe he never noticed how cute and well-shaped you were. You weren't that little girl he met when you were both kids. You were pushing adulthood now. Still pathetic looking, still too shy, still small around him, but fuck, he definitely would have pushed you over the counter the first day he came over and fucked you until you were crying and gagging.

He continued rubbing circles onto your clit and letting his cock soak up your juices. Gently, he positions the tip at your entrances and pushes in slowly.

"There you go," he whispers in your ear, "I know it's a little big. Don't worry."

He manages to fill you up all the way, making him groan. Your walls were tight around him. He thrusts in and out of you carefully, salvaging the feeling of your slick interior.

But you didn't drink all the tea, which means that you could wake up earlier than he expected.

Sakusa didn't expect you to wake up now.

You stirred slightly as you regained consciousness. Although your eyelids were heavy, you tried to force them open only to be met with darkness.

"Mmm," you croaked, rubbing your eyes. The odd feeling of being filled up suddenly made you wake up more. "W-what's going on?"

"Fuck," Sakusa muttered from behind you. You felt a hard chest pressed against your back and...a hand on your pussy. No, something inside your pussy. And that voice was so familiar.

You quickly whip your head around when the realization dawns on you. What the fuck is happening? While your eyes adjust to the dark room, you see two familiar eyes staring straight back at you. He stopped grinding his hips against you for a moment as if time stopped.

"...Nii-san?" you hesitated. His breathing was heavy and he stayed silent.

"Nii-san, what are you doing?" you asked in a panicked voice. You quickly tried to get up from your position, only to be held down by Sakusa’s muscular arms. His hand wrapped itself over your lips to prevent you from screaming.

“Be a good girl and stay quiet, (Y/N),” he whispered. A muffled scream tries to escape your lips. He continued to fuck you slowly, leaving a burning feeling in your walls. The same sore feeling that you would sometimes wake up to within the past few days.

For a moment, you pry his fingers off of your mouth. "I don't understand...Why are you...?" You yelped in surprise, horror, and pleasure as he delivered a sharp thrust from behind you. The smack of his hips against your bare ass made you cringe and feel so disgusted with yourself. Nii-san is actually inside me.

"My poor little sister," he chucked darkly. He suddenly wraps his arm around your knee tighter and forces your legs wide open, your knee almost touching your chest. Instead of putting his hand over your mouth to shut you up, he kneads your breast. His hands were so large.

"You think you can walk around the house looking like a little slut in those tiny shorts?" He stretches you open with his hard cock with slow, yet hard, thrusts. It left your mouth agape, but no sounds left your throat except for small squeaks that you couldn't hold back. "You stupid bitch. Just as dumb as I could remember. Fuck, you don't know how much I wanted to bend you over and fill you up with my cum like the stupid, desperate slut you are."

He was satisfied as you were barely fighting him. All you did was desperately search for something to hold onto and bite your lip because you were so scared. His words were painful. "Look at you. A waste of fucking space, only good as a fuck hole. Didn't even realize she was getting drugged and getting fucked every night because she's so fucking stupid."

Weak. That was all your brain was telling you, mocking you, as Sakusa didn't stop moving against you and insulting you. This wasn't the first time. It just so happened that this time you were able to wake up.

"I-I..." you stuttered, "I'll...I'll tell mom and dad." The sheets were gripped tightly between your fingers. "I'll tell them- mmmm...what nii-san has been doing to me..."

"If you tell mom and dad, they wouldn't even care," Sakusa said in a patronizing tone. The way his hand was caressing you made you wanna cry.

“They would!”

"Mom and dad don't even treat you like a daughter, (Y/N). When was the last time they told you they loved you?" Even if his question was rhetorical, your mind went completely blank. You can't recall a moment where they ever told you they loved you.

"B-but, this isn't right! You're not supposed to be doing this," you argued. It was a surprise that your mind wasn't completely clouded by how big his cock was and how his thrusts felt almost hateful.

"You think they would choose your side? You'd be ruining your own life. Maybe you'd ruin mine. And it'd be. All. Your. Fault." With each syllable, his movements became sharper. "You don't wanna betray your nii-san by saying something, do you?"

"You love your nii-san, right?"

You do. You love him so much, even if you tried to avoid him and he never said a single good thing to you in your whole damn life.

Because you have to love him.

You stopped gripping on the sheets to the point where your knuckles were turning ghostly white to brush away the tears rolling down your cheeks. Your body shook, from both crying because of Sakusa's painful words and how hard he was fucking you. The pleasure building up in your core was overwhelming you, making that intense feeling of having to pee forced out of you.

Hearing your sniffles and small cries, Sakusa pulls you even tighter against him, but doesn't stop his relentless thrusting. It turned him on even more. He pushes your hand to brush away your tears for you, like good big brothers should.

"It's okay, (Y/N). We both know mom and dad don't love you."

A loud cry erupted from your chest. Maybe if your parents cared about you, they'd be running to your room to save you the second you started crying. But, no. Sakusa was basking in the fact that you were hurting on the inside. After years of negligent silence, you were finally letting it all out.

"But nii-san loves you," he said with a smile.

Although his words seemed to stun your entire being, you manage to choke out a "What?" Like it was the first time someone ever told you that they love you.

His torturous thrusts almost distracted you. Fuck, why did it feel so good to have your step brother fucking you on your side like this?

"I love you." He sweetly grabs your face so you can turn your head to look at him. There was a pounding in your ears coming straight from your chest. A warm feeling spreads throughout your stomach.

"You...you love me, nii-san?"

"Of course I do." He was actually smiling at you, "If I didn't, would I be inside you right now?"

His face didn't seem so blank anymore. Sakusa never ever smiled at you. Hell, he never really smiled in general. Someone actually loved you. Holy shit. And he was even pounding away at your insides like you were a fuck doll.

Is that why he's so mean? Was he just trying to hide his feelings for you this whole time? You could die laughing right now. His cock felt so damn good rearranging your guts against your will yet you were struggling to accept it.

Your cheeks naturally puffed up in happiness as you smiled so brightly at him. The flip switched in your brain so easily. Without another word, Sakusa kissed you passionately, because he knew you would let him continue to ravage your body. Your hips began to buck from the pressure building up in your lower half and you starting pushing your hips towards him, welcoming his length inside you. It felt like you needed more of him. More of his love.

Love me.

"Nii-san," you gasped against his lips. His movements never faltered, which you figured was from his amazing athletic ability and stamina.

"Be a good little sister and cum on my cock," he coaxed. He could tell you were so close to cumming from how tightly your precious cunt was hugging his length and how you were squirming against him. You were both slick with sweat. As you started squirming more violently against him, Sakusa tightened his grip on you.

“I’m gonna cum,” you whined desperately, “Nii-san, I’m gonna cum!” You grabbed his arms and pushed your fingernails into his skin, making him hiss from the sudden pain. With a firm grip over your mouth, he muffles your screams. Satisfaction settled in your stomach as you exploded all over his cock. Your sweet juices trailed down your thighs onto the bedsheets.

As much as Sakusa wanted to, he couldn’t fill up your insides and see your hole dripping with his cum just yet. He quickly pulls out of you and lets his seed shoot onto the bare skin of your ass. The shock of your orgasm left your thighs trembling, your skin wet, and your eyes drooping.

“You’re the best little sister.”

You would’ve replied, but you could barely form any words as you lost consciousness again. When you woke up the next morning, you were fully dressed and cleaned up, with no stickiness between your thighs like how you used to wake up.

Sakusa actually cleaned you up this time. You felt your heart melt and butterflies fluttering in your stomach.

Everything seemed to go back to normal between you two, with the same small talks and not really seeing each other often, but he always had a knowing smirk on his face whenever he saw you.

Whenever his eyes would trail up your body to meet yours, you could feel a warmth in your stomach spread all throughout your body which forced you to look away quickly. Whenever he insulted you, you would feel your thighs press together. Whenever you caught yourself admiring his features when he replaced his face mask for a new one, you smiled softly to yourself.

When it was time for him to leave, you couldn’t help but let a few tears shed. He was all set to go, with his backpack on and his mask covering his face.

“Hey, don’t cry, (Y/N),” he cooed, wiping your tears away, “You know I won’t be gone forever.”

You sniffled, “I know. I just hate being here alone.” Well, not necessarily alone. You just hated being ignored and neglected just because you weren’t your brother.

“If you manage to get into my college, you can move in with me. How does that sound?” You instantly perk up and dry your tears with your shirt.

"Really?!” you asked with excitement. You imagine all the things you could do with your nii-san without your parents in the picture. You could go out together, hold hands, share kisses, just about anything. He could even fuck you whenever he wants.

These thoughts about your own step brother would've made you feel sick before.

But that was before you knew Sakusa loved you. Now, you couldn't help but ask your mom when the next time your nii-san would be coming to visit. While you were waiting for his next visit, you studied hard.

College would be so much fun with your nii-san with you!

Part 2

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