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silverhairsimp · 2 years

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Hajime Iwaizumi x reader

Here's my submission for @hanmas When Nobody's Home Collab (I AM SO SORRY IT'S SO LATE).

CW: MINORS DO NOT ENTER! 18+ stepcest, panty sniffer!Iwa, panty thief!Iwa, noncon, somnophilia, vaginal fingering, oral (f.receiving), car sex, unprotected sex, creampie, jealous stepbro!iwa, alcohol consumption (all characters written are in their last year of college and over the age of 21). Let me know if I missed anything in the tags/warnings.

WC: 7.7k (AND IT IS GOOD TO BE BACK!)

ALMOST FORGOT. SHOUT OUT TO @weebaboobs for beta reading for me 🧡 ily bb

Summers home from college always mean the same thing: coming back and being forced to live with your step brother as if the two of you are in high school again, fighting over a shared bathroom and waking up every morning right across the hall from one another. It’s as if nothing’s changed since those first few weeks of living together after your mom and his dad decided to tie the knot. Tensions were high and neither of you thrilled about no longer being the only child. Never being able to shake the feeling as if you can’t escape each other’s presence no matter where you went in the house.

Except one thing has changed…

His friends treat you differently now. Before, you were just Iwaizumi’s little sister. Someone they loved to pick on, constantly snickering at the way you’d get upset over their incessant teasing, always talking about you behind their back.

But now? You’re no longer the wing-spiker’s little sister… you’re you.

A mature, young woman that grew very nicely into her body; filling out each and every curve perfectly.

So it’s no surprise that his friends are at the doorstep of your family’s shared home almost every day, suggesting beach trips or pool parties. Hell, even backyard movie nights - anything to see you in a swimsuit or those skimpy little sleep shorts you were notorious for wearing.

It was so annoying for your step brother, having all of his friends fawn over you like that. And Iwaizumi never understood… Oikawa has a parade of girls following him everywhere, so why is he so infatuated with you? Matsukawa’s no better - Iwaizumi was sure you had heard the rumors about him and all he has to offer, convinced the pretentious ass just wants to prove to you that they’re true.

So, when your mom and step dad texted that they’d be vacationing in Europe all summer, that meant two things: his friends adamantly trying to spend time with you, and an entire summer alone with your step brother.

There would be no one to mediate the fights the two of you were guaranteed to get into. No one to break the tension between you and your brother - something the two of you have ignored for as long as you can remember. No one to keep his friends in check when they think about getting a little too forward with you. And no one to run to when it all became too much, because no one else would be around.

Your brother returned home before you did, his University ending their semester two weeks before yours. So when you finally pulled up to the house, it was no surprise to see three familiar cars parked out front. You could hear the TV blaring from the driveway as you grabbed your backpack and suitcase and made your way to the front door.

“Unlocked. Of course.” You grumble to yourself and roll your eyes, letting out a deep sigh before pushing the heavy door open.

Their attention on the screen was hardly broken at the sound of the door opening, and it wasn’t until you slammed it shut that everyone turned to you. Well, almost everyone.

Oikawa was the first to jump over the couch: “y/n, nice to see you again. I could help you bring your stuff to your room, maybe help you unpack…?” He was always so forward and nonchalant.

Matsukawa sat with his arm draped over the back of the couch and did absolutely nothing to hide the fact that he was staring at your tits. You really should’ve known better than to wear a low cut crop top and high waisted jean shorts, which surely did nothing to keep your ass from hanging out.

“Thanks for the offer, but I can handle it myself.” You push past Oikawa, who mutters something about ‘gotta love an independent woman’. You nod your head to Matsukawa who brings his eyes up to meet yours only briefly before going back to checking you out.

Iwaizumi, on the other hand, was still holding the gaming controller and paying you absolutely no mind. You walk over and slap him in the back of the head, “thanks for the warm welcome, asshole.”

He snickers at you and curses, “Look! You fucking made me die!”

To which you respond with a wave of your hand over your shoulder and a “Boo hoo… you were gonna die anyways.”

It was always like this between the two of you: pushing each other's buttons and getting under each other's skin until neither of you could handle it anymore… it was only a matter of who would crack first.

You spend the afternoon taking trips out to your car and back inside, the summer heat getting to you more and more with each trek. Small droplets of sweat roll down your temple and the sinful thoughts that grace the minds of the men on the couch are anything but few and far between. Those thoughts only intensify when you bend over by the front door to take off your shoes, ass on display while you rearrange the ones already discarded there.

With the last bag inside, you head off to your bedroom to start unpacking. There's a bag full of dirty laundry that needs to be washed and a few suitcases that need to be put away. But, after the first one, you’re not sure how much more you have the energy for.

There will be plenty of time later, you think to yourself.

The day is still young, and it’ll be nice and sunny outside for at least a few more hours. You dig through your half unpacked suitcase and pull out a brand new bikini, quickly slipping it on even with your bedroom door cracked open.

You pull a towel out of the hall closet and throw it over your shoulder, purposefully walking in front of the TV and grabbing the attention of three pairs of eyes on your way out to the backyard.

“Gonna go for a swim,” you say, looking directly at Iwaizumi as you take long strides toward the back door, swaying your hips a little more than usual and waiting for at least two of the three men to jump out of their seats and join you.

Oikawa and Matsukawa are quick to follow. There’s not a second of hesitation before they’re shouting a quick “We wanna swim too!” and darting out the door, leaving Iwaizumi inside all alone.

He knew he should’ve waited to invite those two over.. now he’s never going to have any alone time with you. He can’t seem to wrap his head around what he's feeling. It doesn’t make sense: why he’s so irritated. Even with trying to focus on the game, he can’t help the way his eyes flit over his shoulder every time he hears your laugh and the warmth it brings to his chest.

Why is he so jealous of Matsukawa hovering behind you? And the way he takes far too long to rub the sunscreen into your shoulders. Why does he feel so possessive when Oikawa puts a hand on your knee? He shouldn’t be acting like this over his step sister… but, maybe that’s why… you’re his step sister. His. He can’t resist the urge anymore, he wants to be the one to put his hands all over you. He wants to be the one to rub the sunscreen into your smooth skin. He wants to be the one with his hand on your thigh, or perhaps pinning you down underneath him and holding you open by them instead.

Iwaizumi grumbles to himself, sick of his own self pity, and finally gets up, walking down the hall and stopping in front of his door. He reaches out for the door knob before looking over his shoulder. He shouldn’t be turning around and walking towards your room instead, but he is. He pokes his head inside to see the organized mess strewn across the floor. The different piles of clothes, the half folded ones still in your suitcase… but one thing really catches his eye: a light teal g-string sitting right on top of your laundry pile.

He can’t help but wonder if you wore it on your way home, and before he can stop himself, he’s opening your door even further, taking two strides in and picking them up in his hand. He starts to bring them to his face until the sound of the sliding back door pulls him out of his trance. He’s almost positive he hears Oikawa beg for you to stay and keep him company, but his distance from the back door makes it difficult to accurately hear.

Quickly, he shoves your panties into his pocket and makes sure to leave your door cracked the same amount as when he first went in.

He heads back into his own room and pulls out a pair of swim trunks, officially deciding that he wasn’t going to let his friends have all the fun with you. He pulls your panties out of his pocket and shoves them inside his pillow case for safekeeping and throws his comforter over the top. He tosses his shirt in the hamper just as soon as you appear in the doorway of his room:

“You really shouldn’t change with the door open, never know who could be watching…” His cheeks turn the slightest shade of pink at the insinuation behind your surprisingly seductive words and he turns around before his body gives too much away.

The way you lean against the door frame: arms crossed and wearing hardly anything, the curve of your hips and your smooth legs… it's like you’re begging for his touch. The idea of running his hands all over your body stirs something deep within him - something he’s not quite sure he’s ready to give in to and acknowledge yet. His brows furrow as he looks over to the secret he’s keeping under his pillow, and he can’t help but think how you’d look standing in the doorway in that same teal g-string. He clears his throat but refuses to turn back around to look at you, “thought you were going swimming.”

“I was, but then I thought about how boring it was without you there. Issei and Tooru can only keep me entertained for so long,” a heavy sigh leaves your lips, “just wanted you to come out and join us for some real fun.” And with that, you push off the door frame and make your way back outside, disappearing down the hall without another word.

Iwaizumi mutters those words back to himself, real fun…? What the hell could you mean by that?

The rest of the evening is spent by the poolside, laughing, drinking, exchanging stares with your step-brother that say so much, yet so little at the same time. By now, you’ve lost count of the numbers of beers that the four of you have gone through, as well as the number of pickup lines Oikawa has seemingly “blessed” you with. If you had to take a guess, the numbers are pretty evenly matched.

With your buzz starting to get to you, you head inside to get some food, thankful that there were plenty of leftovers still in the fridge. You pull out a dish, grab a plate and set it in the microwave to heat up. Your elbows rest on the cold surface of the counter as you aimlessly scroll through your phone, catching up with social media and responding to text threads letting your friends know you’re back home for the summer.

You wouldn’t’ve heard the sliding door being shut even if you were listening for it. Too encapsulated in that little device to notice that your step brother had come back inside to check on you.

And he is definitely checking on you.

Watching as the thong of your swimsuit rides up even higher with each sway of your hips. The way your legs and ass flex everytime you rock from your heels to your toes. He can’t bring himself to say anything, not when the only thoughts in his head are filthy ones of you.

He tries to mask the disappointment on his face when the timer goes off and you move to grab your plate out of the microwave. Out of the corner of your eye you finally notice him. “Oh, hey Haji, how long have you been standing there?” your eyes meet and you can’t help but notice the little red tint in his cheeks, wondering if it's from the alcohol or maybe something else…

“Just walked in actually, wanted to let you know the boys are staying the night.” He says as he rubs the back of his neck, squinting his eyes just a bit to try and get another peek at your hardly covered body without making it too obvious.

You laugh and shake your head, “I’ll make sure to lock my door tonight then.”

He laughs nervously along with you and asks himself, would you lock your door if it were just him? Would you purposefully leave it cracked in hopes he’d come in? He considers tampering with the lock, guaranteeing himself some sort of access if he ever wanted it… and fuck, does he want it. He supposes he’ll have to wait until the next time he gets to spend with you alone to find out.

Time seems to pass by exceptionally fast after the four of you had called it a night. Freshly showered and with the rest of your stuff put away, you poke your head out of your door once more.

Just across the hall, you can see the subtle glow of your brother's TV through the crack of his door. Muffled laughs and not-so-quiet gaming taunts reach your ears as your step brother and his friends continue their night away from you.

You chew on your cheek and shift your feet where you stand, debating whether or not you should actually lock your door tonight... It couldn’t hurt to leave it open, could it? Would it really be that bad if one of them were to come in during the night? Especially if there was a chance that the one was your step brother…

–

The next day went by much faster than you’d planned. The morning was spent with your face buried in the same text thread from last night, making plans with your friends to go out to a new club that had opened while all of you were away at school.

All of the boys kept to themselves until right before you were getting ready to go out. Since your step brother was so considerate to have company over, you invited your friends to get ready at your place.

He thought that a good nights sleep and some advil would be enough to sober up his thoughts of you, but he can’t fight off the sudden feeling of irritability he has. He doesn’t want you to go out with your friends and he doesn’t want his friends here. Having you alone is the only thing crossing his mind, and the fact that he can’t have that frustrates him even more. You don’t belong to him… he shouldn’t be so selfish as to not let you go out with your friends. But there’s a part of him that thinks you should belong to him.

He now sits on the couch with his knee bouncing and his shoulders raised to his ears in frustration at the music that’s playing far too loud in your room and the obvious amounts of alcohol you’re already consuming.

It was always the fucking same, he thinks to himself with the palms of his hands pressed to his eyes. You get way too drunk and call him in the middle of the night begging to be picked up. There’s no way he’d let it happen again - not this time. But when you finally reappear in the entryway of the door, all frustrations he had suddenly disappear when he sees you. Maybe he won’t let you leave at all.

Everything about you makes his head spin: the way your hair’s styled perfectly, and the fact that your dress is entirely too short for anyone's eyes but his. He can’t even consider tearing his gaze away from your smooth legs and how toned they look flexing in those heels you’re wearing.

But before he has any time to protest, you're already offering him one last smile as you walk out the door.

He flops back on the couch with a dramatic huff, staring at the ceiling as he thinks of all the ways this night could possibly go.

Even with his friends keeping him occupied at the house, he can’t help but check his phone every 5 minutes looking for updates from you. The occasional snap chat notification comes through, but it’s nothing personal to him.

It’s shameful, really, how many times he has to excuse himself to his room or the bathroom just to replay the video on your story. The way you hold your phone above you, getting the perfect angle to capture your body in that dress, showing off the sway of your hips for the camera.

Were you doing this for all your friends on social media? Maybe for yourself? Or was it for him?

He’s lost track of the number of times he’s swiped up to respond to what you’re posting. But nothing seems right to say. He can’t be too forward, unaware of what you want, or what you think of him… but most importantly, he’s your step brother! He shouldn’t be having any of these thoughts in the first place…

The minutes turn to hours and he comes to the realization that he really just needs to sleep it off. Whatever it is. He pads off to his room, leaving Oikawa and Matsukawa on the couch with their half eaten boxes of pizza and empty bottles of beer.

For the first few minutes, Iwaizumi lays on his back looking up at the ceiling, so many thoughts running through his mind, but he can’t decide on any to dissect. He wonders what you’re doing right now and who you’re with. Are you with your friends still? Or is someone else taking up all your time?

He picks up a pillow and smashes it against his face, holding it there for a second as he tries to figure out why he cares so much about anything you’re doing tonight. His eyes slowly start to drift shut, too tired and confused to think about this any further, until something else catches his attention.

He lifts the pillow off his face and digs inside the case, pulling out the little piece of clothing he took from your room yesterday. With all the time to himself, he brings your panties to his nose and inhales deeply. His eyes shouldn’t be rolling to the back of his head at your scent, but goddamnit, why did you have to smell so sweet?

He’s got half a mind to use them to get himself off, but he can’t ruin them. He’ll find something else to get off to later. Maybe you’ll even help him with it?

It’s almost 2 am when the sound of his phone vibrating against his night stand wakes him up. He rolls over, smirking at your panties he still had wrapped around his fist before reaching a hand out to flip his phone face up to see your caller ID. His first instinct is to answer, but he told himself he wouldn't do this again. He won’t come to your rescue, especially when he has all these thoughts to sort through.

He hits the decline button, flipping his phone face down until his room goes dark again. He pulls the covers over his head in an attempt to resist any further temptation, and that's when he hears it:

Ringing interrupted by a wave of text messages:

Haaaaaajiiiiiii

I know its late

I’m so so so ssorry

Can you pleeease come pick me up :((

By the time he actually answers the phone, he’s ready to tell you to quit bothering him and find your own ride home. But, those words are caught in his throat when he hears a voice on the other line. One that doesn’t belong to any of the friends you left with, or any one he knows.

“Just come home with me sweetheart… Y’don’t need anyone else t’come n’get’cha…”

He can’t believe he’s actually considering coming to get you. “Damn y/n, haven’t even been home a few days and already you’re planning on going home with strangers?” He huffs a laugh on the other line like his words were meant to prove something.

“Shut up! That’s why I called you…” your voice sounds desperate. So needy. He finds it cute.

Iwaizumi is too quiet for far too long on the other line, so you speak up again, “Would you prefer I call Tooru or Issei instead? I’m sure they’d come get me in a heartbeat… on second thought, maybe i will go home wi–”

He cuts you off before you can get another word out, “’m on my way.”

You hang up the phone with a grin on your face, not even sorry to be telling the stranger you won’t be joining him tonight.

The whole drive over he can’t help but think about what would’ve happened if he didn’t answer your call.

There was no way he was gonna let you, his sweet little step sister, go home with some asshole that only wanted one thing. And for fucks sake, his friends? If only you knew the things they said about you - the things they wanna do to you, he’d never admit it but, most of them he’d like to do to you himself…

Iwaizumi had every intention of ignoring you, but when you mentioned them, and when he thought about anyone else having you tonight, it made his stomach turn.

It was only about 20 minutes before Iwaizumi was pulling up to the curb outside the club. He opens the door to his truck with gritted teeth, trying to compose himself at the sight of some random guy's arm still slung around your shoulder and his face far too close for comfort.

He opens up the passenger side door, “y/n. Let’s go.”

You take a few steps toward the truck, only to be pulled back by your hand, “C’mon baby, you don’t gotta go with him.”

Quickly retracting your hand as you pick up the pace and make it to the door he’s holding open for you. As soon as you take that step up into the truck, Iwa makes sure to move behind you to block the view before you flash anyone still watching. Maybe he selfishly wanted that view all to himself.

Once he’s back in the car, the ride is quiet, neither of you saying much of anything. There’s a soft clattering of your heels being taken off and dropping to the floorboard. Your head is spinning, from both the alcohol and the unspoken tension that's filling the car right now.

Instead of saying anything, you lean your head against the cool glass of the window and pull your feet into the seat. Thankfully there’s just enough room to tuck them under the middle seat that’s folded down to separate you from your step brother.

You don’t remember being this tired, but after situating yourself, the quiet hum of the engine and the music playing in the background is enough to lull you to sleep.

Iwaizumi does his best to keep his eyes on the road, but as soon as he hears you take that deep breath and let out a little hum, he can’t help the way his focus shifts towards you.

He watches the slow rise and fall of your chest and the way your tits strain against your dress. His eyes follow down where your dress is cinched at the curve of your waist until his gaze lands on something else… something much more interesting than anything else on the road.

He’s sure you hadn’t realized it, but when you pulled your feet up you exposed a completely different part of your body. Something that he’s been dying to see for as long as he can remember… Peeking out of your short dress, is your pretty little pussy, covered in the thinnest lace he thinks he’s ever seen.

Without even thinking twice about it, he reaches for the folded seat in the middle and lifts, now creating a perfect bench in the front seat of his truck. He couldn’t bring himself to pull his eyes away.

It was no wonder you had some random guy hanging off of you all night. He’s not sure he would’ve been able to contain himself had he seen you like this earlier. This was exactly why he had to step in, no one else was, or is, going to have you.

It was wrong, he knew it was, but he almost didn't have control over the way his hand stretched out toward you. His thumb rests on the underside of your ass, gently spreading you apart as tries to get a better look at the outline of your puffy lips.

If it weren’t for the upcoming stop sign, he’s sure he would’ve kept his attention between your legs. Perhaps he should be thankful for the stop sign in the middle of the night with absolutely no one around…

With each second that passes, he can’t help but think about how you feel, how you taste… He knows your guys’ house is only a few more minutes away, but no matter what he does to distract himself and get the two of you home, he can’t pull his focus away from you.

He turns the air conditioner up just a little higher and the music up just a bit louder. Even tries to fidget with his phone, but he can’t. It’s no use, not when you’re here… like this.

Your legs begin to shift a little bit just as he passes the house and he doesn’t want this to end, so he keeps driving. Wanting to keep you asleep so he has time to sort out these thoughts in his head and the aching in his pants.

Once you’ve fallen back into a comfortable sleep, he reaches out to you again and settles a hand right on the side of your thigh. His thumb circles the bottom of your ass, each stroke threatening to go lower and lower until he reaches the edge of your panties. The closer he gets to your core, the more he can feel heat radiating from it.

Can you feel what he’s doing to you? Do you like it? He wishes he could bring himself to wake you up and ask you, but he can’t. Not yet.

He inhales deeply and grips the steering wheel impossible tight as he lets his thumb trace along the edge of the lace. His exhale comes out shaky, he's not sure if it’s because he’s nervous or because he knows how wrong this is. It’s probably a combination of both.

He drives like this for a bit: making slow turns down poorly lit roads, keeping his hand in place and working his way a bit lower every few miles. There’s not a single car in sight as he approaches another stop sign.

He presses gently on the breaks and rolls to a stop, his focus is right where his thumb rests against your skin. He puts his truck in park, but keeps the engine idling as he takes in another deep breath before moving his thumb across your slit.

The touch ghosts over you, hardly even there but he feels you. The growing wet spot starts to show, even with the darkness of night surrounding the two of you. He repeats the motion and adds more pressure with each deliberate drag of his thumb.

The slick building up on his thumb only makes him want more– more of this and more of you. He spreads the wetness up your slit and circles your clit through your panties.

“Hnngh– H-Haji-me…”

He freezes when he hears you mutter his name… but your eyes are still closed when he looks over at you. There’s no way his thoughts can be right, but there’s no other explanation. You think about him too, he convinces himself.

Part of him wants to wake you up so you can both enjoy this moment, and the other wants to see how much he can get away with while you're still asleep.

For the first time, he pulls the fabric between his fingers and lays his eyes on your bare cunt. Strings of slick still connect your lower lips to your thong as he pulls it away. He’s surprised you don’t wake up once the rush of cool air from the ac hits you, but he’s not complaining one bit.

His throat bobs as he swallows thickly at the sight of you, he mutters a soft fuck before he licks his lips. Wanting nothing more than to dive in and eat you out like he’s been wanting to for months– hell, years!

The temptation is hitting him full force as he spreads your lips open with two fingers. Your clenching little hole practically begging to be filled by him. He thinks of all the things he’d do to you: the way he’d take it nice and slow, starting off with one finger, then adding another, maybe one more after that. Maybe he’d prep you, but he’s living for the thought of stretching you open with his cock and as much resistance as possible with how tight you’d be.

He wonders how greedily you’d suck him in, how politely – or pathetically – you’d beg for more. His thoughts are short lived once you start to shuffle around again. Mindlessly rubbing your thighs together before you crack open your eyes and look at him.

Iwaizumi should be ashamed and embarrassed that he’d practically been caught touching you like this, but he's almost relieved. Relieved enough to finally see the way your eyes roll to the back of your head once he gets the chance to bury his fingers knuckle deep inside of you. Relieved to finally be able to hear that pretty voice telling him what makes you feel good and where you need his touch.

He starts to pull his hand away, thinking maybe the two of you should talk about this or at least acknowledge what he’s doing. To his surprise, and your own, you reach out to grab his wrist, keeping his hand in place.

“Haji… did you want something?” you’re clearly giving him a chance to answer honestly but he’s almost frozen. Unsure what to do or say until you pull his hand even closer.

He clears his throat and rubs a finger up and down your slit, just like he had before you woke up. “Yeah… I uh– you. I want you.”

“Mmm, me? What about me?” you’re teasing him and he’s almost getting impatient. He’s had a hard on since he first saw your thong peeking out from under your dress and the teasing is making him even more impatient.

“Why don’t you sit up and come over here for me? I’ll show you exactly what I want.” He's already this worked up, he can hold out for a bit longer…

You shift in your seat and spread open your legs before settling on your knees in the middle. A large hand grips your inner thigh as his fingers trail further up until his hand is cupping your pussy under your dress.

“Y’know how many conversations Oikawa and Matsukawa have had about you? How if they were your step brother… you’d technically not be related by blood so it wouldn’t be weird to fulfill all the fantasies they’ve had about you… I’m starting to think they’re onto something.” Rough fingers press even harder against you and by the way you pull your dress up even further, to a point where it's bunched around your waist, he can tell you’re on the same page.

“You think about touching me? Doing all sorts of dirty things to me, hm?” Your hands play with the shorts strands of hair right above his ears and his eyes start to close as he leans into your touch.

“Most of my thoughts are about you. It’s real fuckin’ annoying.” There's a smile on his lips when he says it. He knows that he’s more so annoyed with the fact that he hasn’t been able to do anything about it, but that’s all about to change right now. “You know, you were mumbling my name in your sleep… guess i’m not the only one who thinks about my step sibling.”

There's a wicked smirk on his face and your cheeks start to redden, he thinks it’s a good look on you and he wants to fluster you even more. “Want me to keep touching you like this?”

You nod your head in response, but that's not good enough. “Use your words, or else I stop.”

“Please… don’t stop. Want you to keep touching me.” You pull your hands away from his hair and bring them to your waist. Hooking your thumbs into the waistband of your thong and willfully pull it off yourself.

You shift back in the passenger seat like you had before, pulling your knees to your chest and tugging your panties down until they’re hanging around your ankle. You raise your foot in front of his face, allowing him the honors to completely remove them from your body.

He takes them off with a smirk before looking at you and quickly shoves them into his pocket. “Oh, I know you took my panties before…” you smile at him and bend your knees before opening your legs. “The teal g-string… I used to wear that pain to all your games, y'know.”

There’s a redness in his cheeks that you hadn’t seen before. He starts to think about all the games you’d been to over the years, and each time you worse those. “Gonna keep these ones too then, start my own collection.”

“You’re such a pervert…” you say the words but you don’t mean them, not when you’re sitting in the front seat of his truck with your legs spread wide open. There’s a silence between the two of you as he tries not to look down at your perfectly spread legs and what lies between.

He can’t fight it off anymore when he sees your own fingers start to rub little circles around your clit. “I always thought your fingers would feel so much better than mine… wanna help me test that theory?” Now you’re the one with the smirk on your face.

He squares his body to face yours, shifting just enough to where his hip and forearms rest on the seat. “Happily, but I've always wondered something too… wanna taste you first.”

You don’t have anytime to process or oppose the offer before he’s finally diving in between your legs. The flat of his tongue dragging all the way up before his lips wrap around your clit. The sudden pressure forces your hands into his brown roots and you don’t hesitate to tug roughly. Eliciting a groan from him that makes your legs shake.

“’S so fuckin’ good” he growls into your pussy. You taste even better than he could’ve ever imagined.

If it wasn’t for his hands keeping your thighs in place, your legs would surely be threatening to close around his head.

Every whimper and moan of his name from your lips is a dream come true. He never thought he’d be able to hear it for himself, and now that he has, he never wants it to stop. He’ll sneak into your room every night from here on out just to bury his face in between your legs if it means getting to hear you, and taste you like this.

“H-hngh! Haji, your fingers.. Please…”

You certainly don’t have to ask twice before he’s burying one finger inside of you. Curling it expertly as if he’s known that sweet spot all his life.

He keeps his lips wrapped around your clit as his finger moves in and out of you in a slow drag. Pushing against your g-spot before pulling out and pushing back in again.

“More. Gimme more. Please…”

Fuck you sound so cute when you beg like this. He’s almost worried his words come out of his mouth instead of keeping them in his head. He wants to give you more, but not another finger. He wants you around him now. Your tight walls hugging his cock instead of his fingers.

He pulls back before shifting in the middle seat, his mouth is slick and glistening with you all over his face. “You want more? Come get it yourself.”

Even with all the tension, he’s still pushing you. Still playing into this little game, trying to see how far you’re willing to go.

Your eyes are glossy and your mouth hangs open, but you move. Getting exactly what you want as you straddle your legs over his lap. Needily rocking your hips against his.

He’s gotten himself so riled up that he’s not sure how much longer he can last. You steady yourself by holding on to his shoulders as you lower your lips to his neck. You can feel his jaw clench as he leans away from you, giving you all the access you want.

Little kisses are pressed along the column of his neck until you reach his jaw and move your way across. You hadn’t realized how badly you wanted to kiss your step brother until his lips were right in front of yours.

Your eyes meet for a brief second before there’s no longer any space between you. There’s a hum when you taste yourself on his lips and he thinks about how your lips really are as soft as they look.

His hands are on your hips before he hooks his thumbs into his own sweats, trying to tug them down until you get the hint. When your hands move in to replace his, he snickers against your lips, “greedly little thing aren’t’cha?” He puts his hands back on your hips and lifts you just enough for you to slide his sweats and his boxers down to the middle of his thighs.

“Fuck– if I woulda known you were so eager for my cock, I would’ve done this so much sooner.”

You don't offer any response, too focused on the leaking tip of his cock that's poking out between your legs.

You spit in your hand before lowering it to wrap around his length, stroking him a few times until you can feel the weight of it in your palm, “t’s big…” He smirks at you before slapping your ass roughly, grinning even harder when he can feel the skin ripple in his lap.

“You can take it… I know you can. You wanna be a good girl for your big brother, right?”

You nod your head before moving your hips to line him up at your entrance. His tip is angry and leaking, he’s really not sure how long he’ll last once he’s finally inside of you.

There’s a little resistance when his tip pushes inside of you and he throws his head back, internally telling himself that he made the right decision by only using one finger earlier. The feeling of your walls around him is suffocating in the best way, squeezing him tighter than he’s ever felt with anyone else before.

The only thing on his mind is molding you to the shape of his cock so it’s the only thing you know.

His head feels dizzy the lower you sink down and he moves a hand in between your bodies so his thumb can rub tight circles around your clit to ease the stretch. Little whines leave your lips with the added stimulation but it helps the last few inches slide right in and you’re fully seated on his lap.

Your breaths are shallow and shaky and he wants more, “Rock your hips back and forth for me… c’mon, you can do it.” and you do, without question. You’d do anything for your big brother, even ride his cock in the front seat of his truck in the dead of night.

He removes his hand and leaves a hot trail up your body with his fingers. Tracing the swell of your ass, over the curve of your hips to the dip under your breasts until he reaches your shoulders. He reaches for the thin straps still resting there and tugs them down.

You turn your face into his touch and shrug your shoulders, helping ease the strap even further down until your top half is no longer covered. Man is he thankful you weren’t wearing a bra. He’s not sure he wouldn’ve had the patience to take that off without ripping it to shreds.

“Fuckin’ perfect…” he whispers against your skin as he pushes your dress even further down so the whole thing bunches around your waist. He groans, finally able to fit both of your breasts in the palms of his hands.

With each roll of your hips, your clit rubs against a neatly trimmed patch of hair at the base and your back arches further into his touch. His hands are greedy, twisting and tugging at your nipples while his tongue licks a fat stripe between the valley of your breasts.

Your hands are just as desperate. Holding on to the hairs at his nape as if it was the only thing keeping you upright. The way you push his face even deeper into you doesn’t go unnoticed either.

“Haji.. want more, please I–”

He chuckles against your skin, he could get used to the sound of your voice when it’s so needy for him. “Gotta tell me what you want more of… or else I can’t give it to you.”

It’s so embarrassing, how much he’s making you beg for him. “Want you to go harder.. Need to feel it..” You try to lift your hips up and back down but he doesn’t allow you much room for any type of movement.

He pulls one of your tits into his mouth and sucks eagerly on your nipple, rolling it harshly between his teeth before circling his tongue around it. He keeps his mouth put before moving his hands to your waist and lifting you up just enough for half of his cock to come out.

He snaps his hips against yours and repeats the motion. A loud shriek fills the cabin of the truck before you're reaching behind him. Your hands find the back of the seat as you steady yourself while he bounces you on top of him, thrusting his own hips to meet yours and make his movements even more intense.

There’s an incoherent babbling falling from your lips and he's not sure if it’s from the alcohol you consumed tonight or if you’re just cock drunk from how he’s fucking you right now. He hasn’t had a drop of liquor and he feels his own vision start to blur onces your walls start clenching around him.

“F-fuck! You feel s-so good Haji–! More! More!”

His grip on your hips is impossibly tight and he feels as if he’s about to burst any second. He fucks you hard and fast, trying to get you to come undone before he does, but it’s too much. You’re hugging him too tightly and he can’t last another second.

He does everything he can to lift you off of him so he has time to pull out, but you fight against his hold and settle your full weight into his lap. Burying him to the hilt as he cums right inside of you. Rope after rope filling you up. There’s so much that it’s starting to leak out and fall into his lap.

You sit in his lap with your forehead pressed to his shoulder as you try to regain and steady your breath.

“You’re fuckin’ filthy… letting me fill you up like that…”

You laugh against his skin before pulling away to look at him. There are beads of sweat above his eyebrows and a few rolling down his temple. Your delicate fingers swipe over them, wiping them away before smiling.

“You woulda had a mess all over your truck… we wouldn’t want that. Plus, it would’ve been such a waste…”

All he can do is shake his head, trying to wrap his thoughts around everything that just happened. The internal battle he was having with himself earlier finally finds some revelation. He got to have you all to himself. Really have you.

He’s not sure where the two of you go from here, but he’s not willing to give up everything he’s just had a taste of. He’ll find a way to keep his little step sister taken care of.

There’s a comfortable silence between the two of you and he pulls your straps back up and over your shoulders before he taps your thigh twice, signaling for you to climb out of his lap. He checks the time on the dash and he knows the two of you need to get back home.

“Can you take me home and fuck me forreal?” If it weren’t for those big doe eyes you’re giving him, iwaizumi would have snapped back with some snarky comment or flipped you over in his front seat and taken you right there.

“If I fuck you forreal you’ll wake the whole block up. Not sure Issei and Tooru would tolerate you interrupting their beauty sleep,” he claps back at you.

“That’s fine, maybe they’ll wanna join too…”

“You’re really in for it now.” Who would’ve thought his step sister would be the fucking death of him.

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