Work Text:
Baby, take me, don't hesitate
With a girl like me you better activate
I'm a tidal wave coming for your grave
I wanna do bad things with you
xXXXx
Yuuji is excited, that much Choso can tell by the way she looks at him as he presents her with the unassuming looking box containing what he picked out just for her. A gift.
Though in truth the gift is also for him.
It is something they have briefly discussed a few times now, usually during the more intense moments between them. A desire Choso confessed to her after she'd convinced him to make videos they could share online.
“I want you to wear that, but only when you are willing”
Choso's voice is even, as if remarking about the weather and Yuuji smiles sweetly at him. Her eyes half lidded and alluring in a way that tells him the role between predator and prey is always in flux within their relationship. Her fingers caress the soft, buttery,leather of the black collar contained in the box he just gave her, daring to lean in close to him and whisper a playful.
“Thank you, onii-chan”
—--
Yuuji doesn't start wearing the collar right away, and Choso doesn't blame her. Not while watching his poor little sister trudge through finals week with so much stress and so little sleep.
He does what he can for her, cooking meals, cleaning, buying her favorite treats. And at the end of it watches her collapse and rest for a full day, exhausted but happy with the fruits of her labor.
Choso couldn't be any more proud of her. Planning a night out for them to celebrate her achievements, with Yuuji enthusiastically suggesting they go out to the karaoke bar.
Which is why it is surprising when Choso finds her waiting for him on Friday, after showering and changing, wearing thigh high boots, and a form fitting, off the shoulders dress with long sleeves. But most importantly, she is also wearing the collar he got for her.
“...Yuuji”
The smile on her rosy tinted lips spells danger for him
“You told me to wear it whenever I was willing, right Onii-chan?”
His heart races at the implications of her words, completely unprepared for it. And yet, he finds himself undoing his pants with surprisingly steady hands. Hands which coax Yuuji to her knees in front of him, unable to resist indulging right away.
"Yes. That's right. Only when you are willing to submit to me"
Yuuji goes willingly, leaning in of her own accord to mouth and suck at the underside of his cock, slowly moving lower to give attention to his heavy sack while he takes himself in hand and strokes his quickly filling member to full hardness. Something which never takes long to accomplish when those warm amber eyes are focused on him.
His little sister is just too sweet while she's on her knees for him. The feel of her warm mouth on him makes his cock twitch in his grip. Groaning low in his throat as she sucks on each side of his sack, taking into her mouth and tugging at it carefully, just like he taught her.
He lets her take her time, fixated on the feeling of her tongue moving against him and how truly shameless she is when it comes to showing him just how much she loves to pleasure him in this way. It's something he understands all too well, he also loves to put his mouth on her.
Of course, they have a finite amount of time. So, he tangles the fingers of his free hand in her hair and gently tugs her back and away from him. Watching her features closely for discomfort, or any indication that this is not what she wants.
“You're beautiful, Yuuji. So beautiful"
Choso smiles, pressing the tip of his cock against her perfect, glossy lips. Smearing his precum over them and letting out a shuddering breath when she licks it off and moves the tip of her tongue against the source, asking for more.
“You're going to be good for me, aren't you, Yuuji? My perfect little sister. Go on, suck my cock baby”
The warmth of her mouth around him is perfect as she sucks on him sweetly, rolling her tongue over the sensitive tip and the underside of its crown with practice ease. Still not experienced enough to take even half of it in as she begins to move up and down his length.
It's perfect. But Choso wants more.
Holding her head in place while he fucks into the warmth of her mouth. Mindful of just how far she can take him and shaking with the effort to go slow and stop before he can make her choke.
“That's right baby, just like that. Fuck…”
After the excitement and anticipation of this moment, it doesn't take long for Choso to be ridiculously close to his climax, having to pull out and squeeze himself to stave it off for just long enough.
“Open up”
So proud of his little sister when she does so obediently, sticking her tongue out just far enough for him to rest his cockhead on it while he strokes himself desperately until he is spilling against it and into her waiting mouth with a satisfied groan, treated to the sight of Yuuji swallowing with a blissed out look on her face.
“Fuck”
The sight of it makes him unable to keep himself from dropping down to his knees to join her, licking the taste of himself from her mouth while praising her.
“Such a good girl, my perfect little sister”
Yuuji moans softly against his lips, calling out for him sweetly
“Onii-chan”
Squirming and pouting while she clings to him in a way that lets Choso know just what she wants. But she's agreed to play his game, and he has other plans. Standing up and pulling her to her feet instead.
“Come on. We have to get ready”
There's a hint of confusion on her face, even while she lets herself be led into their room and to their bed.
“Turn around for me, Yuuji”
She looks a little excited as she does, pliant when he makes her lean forward to hold herself up on her hands and knees atop the bed, the knit fabric of her tight dress riding up enough to reveal the black lace panties she wears beneath, delicate fabric sticking to her skin with the telling signs of her arousal; it's the kind of panties she always wears for him when she wants special attention.
The sight of it puts an amused smile on Choso's face
“You were ready for more, weren't you?”
Yuuji does her best to turn and watch him, a smug little smile on her face.
“It's what the collar means, right? I belong to Onii-chan and he can use me whenever he wants, right?”
Choso hums appreciatively, reaching out to pull her panties down to mid thigh and then pinch his smug little sister's clit between two of his fingers, rewarded with a cute little choked off sound.
“That's right. You belong to me”
His calloused fingers glide through her wet folds, spreading them apart to get a look at her pretty pink insides.
“While you wear it you are not just my little sister, you're a tight hole for me to fuck and use however I want. My own personal cocksleeve”
Choso's fingers move, pressing inside her gently to fuck her pulsing body nice and slow until the digits are throughly coated in her pleasure
“Not just here–”
He pulls them out slowly, trailing them upward to a place they have recently started to explore.
“But also here”
Choso enjoys teasing the puckered rim of her hole, surprised to find she has already prepared herself as he presses his fingers past the tight ring of muscle, and feels the lubricant coating her soft insides.
"You really are too spoiled. You got yourself ready, knowing I'd also want to touch you here”
The innocent look Yuuji tries to give him is ruined by the molten heat in her eyes, making her gaze far too honest and hungry to be a believable act. Still, Choso can't help but find it endearing.
He loves his spoiled little sister most of all.
“But you forgot something, didn't you?”
Yuuji moans and whines predictably, squeezing around his fingers while she allows him free run of her body and milks pleasure from his actions.
“Cho-nii, i want...”
“Shh, you want to be good for me don't you, Yuuji?”
She nods frantically and Choso loves seeing her so needy. Unfortunately they are short on time, and he still has one more thing to do. Reaching into the nightstand on his side of the bed and retrieving the thick plug they've been using since he finished training her ass to take his cock.
Still not tired of teasing her, he fucks the cool bulbous end in and out of her cunt; delighted by the arch of her back as she offers herself completely and treats him to her needy little whines until he carefully pushes the plug into her pretty puckered hole, stepping back to inspect his work.
The flared base makes it comfortable and discreet for her to wear, and the cute little heart shaped jeweled embellishment adorning it certainly makes it more charming.
“Now, come on. We have a date together”
—--
Yuuji blushes as they walk towards the train station, bare shoulders covered by one of her big brother's jackets. She could have never imagined that wearing the collar would escalate things between them so quickly.
The only expectation had been that Choso would take her up on the offer after their outing. And yet, here they were; walking together quietly through the streets, hand in hand. While the shift of the plug inside her makes her blush and become more and more wet by the second.
Her arousal compounded by the fact that Choso removed her panties completely and put them in the pocket of his long coat before they made it out the door.
It makes Yuuji feel bare in a way she never has. It also makes her hyper aware of how easily it would be for her arousal to drip down her thighs; bringing a fresh wave of exhilarating shame as she is led into the subway cart which will take them downtown.
The cart is crowded inside, predictably so for a Friday; when both work commuters and people going out for the evening mix in a mass of bodies within its metal walls.
Yuuji is glad Choso's body serves as a barrier between her and being pushed and shoved by strangers, especially at a time when she feels hyper aware and wants nothing more than to hide against him, something he happily allows while keeping her cornered near the door.
Everything feels normal and expected at first. They have made the twenty minute journey plenty of times, and Yuuji’s earlier nervousness at being exposed and hiding what she feels is a thrilling secret, begin to ebb away. Allowing her to finally relax a little and enjoy herself while she pretends to stare out the window into the intermittent darkness of the series of tunnels that make up their route.
Nothing really changes until five minutes in, when she feels Choso pull her back and into a tight embrace, immediately making her aware of his hardness by pressing it insistently against the top of her ass.
Yuuji can't help but look around and blush, glad to see no one is really paying attention to them, most people standing are turned away and looking at their phones, their backs obscuring the little corner her big brother has chosen to hide her away in.
“Cho-nii–”
Choso shushes her gently, reaching up to caress the collar around her neck, a reminder of their current circumstances, while he continues to rock discretely against her.
“If you don't want to get caught, you should do some of the work”
Despite her worries she begins to move, feeling Choso widen his stance and bend his knees slightly to allow her to grind herself against him more fully, bracing herself against the wall as she rolls her hips and pushes her ass back against the very noticeable bulge in his pants, forced to cover her own mouth at the feel of the plug shifting inside her with each movement, accompanied by the surprising feel of her brother's hand sliding up one of her legs and beneath her dress. Stopping only once it reaches her sex and begins to circle her clit with practiced ease.
The feel of it almost undoes her, having to bite her lip to keep quiet while Choso whispers into her ear.
“You're soaked. This is why you like making videos with me isn't it? Its not the money, it's because you want people to watch me fuck you. Want them to know just how much of a slut you are”
Yuuji's whole body feels like its burning with shame, blushing hard at her older brother's words and feeling like she can't hold on much longer without making a sound. Thankfully, Choso stops at that moment, just as the subway does and its doors open to let in more commuters, his body keeping her hidden until they have all boarded and he can resume her torture.
She does her best to stay quiet, even when he reaches beneath her dress skirt once more to take a hold of the plug inside her, letting her feel him tugging it out of her body slowly until she is empty and the plug disappears into his coat pocket.
At that moment she knows what he's going to do, though it makes it no less shameful. Watching her older brother undo his pants and pull himself out before discretly hiking up the back of her dress and carefully guiding the tip of his cock against her ass. Made pliant and kept ready by the plug, ready enough for him to push into her inch by inch until she is completely full.
“this is what you've always wanted isn't it?”
She can't trust herself to speak, not while being spread on his cock in public. If anyone notices they could get into a lot of trouble, and yet she can't help her excitement nor the way her insides pulse needily around him while Choso discretely lifts her off her feet to a height which will let him move more discretely against her.
Each shallow thrust into her ass makes her dangling feet move slightly and her pussy drool slick, dripping onto the floor beneath her while her cunt remains pitifully neglected and empty, aching for the same treatment.
The situation only escalates when Choso leans in to whisper.
“Go ahead baby, play with your clit. I want you to milk my cock like a good girl”
She does not object, she no longer can, trusting that her big brother will make sure to keep her out of sight. Yuuji braces against the door with one hand and moves the other to the mess between her legs, blushing at the barely there whisper or her fingers moving desperately over her clit while Choso holds her weight and continues to fuck into her ass.
It's so good, the knowledge that anyone could catch them, could be watching her be used by Choso. The prospect makes her burn with shame and desire, biting down on her lower lip to keep from making a sound when she comes embarrassingly quick, barely aware of the almost imperceptible grunt from Choso before she feels the warmth of being filled with his cum.
Choso allows them both a moment to recover, the sounds around them coming back into focus when he sets her back down on her feet, and pulls out of her body carefully. Quickly pressing the plug back inside her ass before his cum can make a mess, then tucking himself back in his pants.
Yuuji doesn't know how to feel in the aftermath, looking around the cart shyly to confirm that no one was really watching them, her eyes landing on Choso, who offers her a secretive, crooked, smile. Looking for all intents and purposes like the cat who got the cream.
It makes it impossible for Yuuji not to turn around and reach out to cling to his neck while he pulls her close again and kisses her as sweetly as he can despite being clearly eager for more.
“I'm nowhere near done with you”
His words send a thrill up her spine, displaying her absolute delight and agreement by nipping playfully at his jawline, then leaning in to whisper in his ear.
“Onii-chan came in my mouth and my ass. He should come in my pussy next, it's only fair”
She does her best to pout and look up at him innocently, pleading with her eyes for what she wants until Choso begins to kiss her again. This time wet and hungry; his tongue brushing against her lips then pushing past them and against her own the moment she opens up.
It's hard to keep completely silent while her older brother seems set to grope and kiss her breathless, humming her pleasure into his mouth until their moment is interrupted by someone clearing their throat behind them.
It reminds Yuuji where they are as she breaks the kiss and hides her face against Choso's chest, partially hidden by the coat he wears, while her brother looks back to meet the stare of the stranger looking at them. The glimpse of the sharp look she catches Choso directing towards the man keeps a smile on her lips for the rest of the ride.
—
When they arrive at the Karaoke hall, it doesn't take long for Choso to get them checked in and for Yuuji to pick her first drink of the night. Something sweet and sour to compliment the snacks she adds to their bill. For his part, her brother picks a simple bottle of sake, a small one meant for individual consumption.
Choso is no professional singer and neither is Yuuji, but they are just there to have fun. Sipping away at her drinks and taking small bites of the sweets on the table as they go from one song to the next. The smooth and deep timbre of her older brother's voice doing funny things to her in her slightly inebriated state as the space between her legs pulses pleasantly.
They'd rented the room for two hours, an amount of time Yuuji had considered far too lengthy with just the two of them there. That is until Choso decides to stand and press up against her, kissing the back of her shoulders and slowly pushing her dress down her body while she continues to sing. Carefully working its long sleeves down her arms and eventually letting it spill onto the floor.
She should be more ashamed at being almost completely nude, save for the collar, and her thigh high boots. And yet, compared to being fucked in a crowded train, the space is a lot more private and intimate.
Choso wastes no time to continue press up behind her once more. Marking up her neck and shoulders while his hands caress whatever bare skin they can reach; from her legs and waist, to her ass and the swell of her breasts. She lets herself be touched and squeezed, doing her best to continue singing.
“Yuuji, you look perfect.
I should leash you and make you walk home just like this. Show everyone how wet you get from being watched, and then show them how much you lovebeing spread on your big brother's cock”
She blushes at the thought of being mounted by Choso infront of strangers, the space between her legs warming and tingling with arousal until it becomes a familiarly pleasant ache. Suddenly falling quiet while the instrumentals continue to play in the background.
“I bet you're soaked just thinking about it right now, bet your little clit is hard and begging for attention. Do you want nii-chan to kiss it better?”
"Yes"
Yuuji nods, watching him round her body and drop to his knees in front of her. The feel of his warm tongue moving against her sensitive clit is enough to have her covering her mouth to keep quiet. He's gotten so good at pleasuring her like this and she is so turned on she knows she doesn't stand a chance.
“Nii-chan…please–”
Choso presses a sucking kiss over her clit and draws back.
“You want me to lick inside you, don't you? Love to feel anything inside your slutty little cunt”
She moans behind her hand, shaking her head and trying to gather up her thoughts through the fog of arousal, sounding almost petulant when she says
“My pussy only belongs to onii-chan, it's only slutty for nii-chan”
If she is a slut, she is only a slut for her older brother.
Choso smiles, coaxing her to sit on the table and lean back, his thumbs hooking into her glistening cunt just to spread it open obscenely.
“What about how much you like being watched by strangers?”
She can feel her face burn at having to admit it, but she still wants to all the same.
“I want to show them onii-chan is mine, to show how good onii-chan makes me feel…I-I want them to watch onii-chan’s big cock ruining my pussy”
Yuuji mewls and keeps her legs spread wide for him, aching to be touched while he watches her insides pulse. Thinking about her older brother fucking her always gets her so hot, she can't even feel ashamed about how needy it makes her.
After all, she had been the one who insisted to call him that while they streamed and on every single one of their videos for a reason. Had also been the one who built their scenarios purely based on her desires. Burning with shame and arousal while she titled each of them
Big brother sneaks into my room me while our parents sleep
Big brother catches me masturbating
Big brother secretly fucks me while we study
In truth, her love and desire for Choso would remain unchanged regardless of his relation to her. But the fact that he is her older brother has truly twisted up and changed so many of her dirtiest fantasies.
The confession makes Choso look extremely pleased, keeping his eyes locked one hers as he leans in to lap into her body with slow and measured strokes of his thick tongue. Of course, it's not long before his face is pressed against her while he eats her out in just the way that immediately led her to discover one of her brother's biggest fetishes.
Eating pussy.
Thinking of her older brother as what her friends have categorized as a munch, never fails to break Yuuji's brain just a little. She really wishes they had never talked about it, and that she had never been honest enough with them to come face to face with their usage of the word when pertaining to her boyfriend.
And yet, the truth is undeniable, she has watched Choso come in his pants during their longest sessions focused on eating her out, sessions he himself asked for.
It makes it impossible to dispute any allegations pertaining to the fact. And while she can't tell her friends about Choso being her brother, they all definitely know he loves to eat pussy, her pussy, specifically.
It also means that with so much experience, when he really wants to, he can make her lose her mind and cum ridiculously fast just by licking and sucking on her clit, just as he as he is doing now.
The feel of his mouth dropping low once more, almost makes her scream; moaning behind her hands while he licks into her pulsing cunt and rubs at her clit with the pad of his thumb. Using his free hand to pull at the plug buried inside her ass.
He's teasing her, driving her insane, and she loves it. Begging for more without shame, though she tries to stay quieter than the drone of the music playing in the soundproofed room.
“Nii-chan, please, want your cock please”
Choso shushes her by crawling over her and kissing her sweetly, letting her taste herself on his lips and tongue.
“Not yet, you have to keep being good Yuuji…gotta be a good girl for onii-chan–”
She pants between kisses, fighting the urge to cling to him after he carches her hands and guides them back down onto the table. Not ready to speak through the deep sense of want that makes her whimper pitifully. Disappointed when she watches Choso use his teeth to open up a condom wrapper, something they bought to use on their streams, and watches him round the table to crouch on the side before he speaks.
“This will have to be enough for now”
The feel of something slick and cool pressing inside her has her eyes snapping open just in time to watch her older brother press the sake bottle he ordered for himself into her soaked cunt, holding base in his hand as she is spread around the neck and the wide cylinder of its body. It's not nearly as thick as her brother's cock, but thick enough to sate her desire to feel something moving inside her.
Yuuji has to bite down on her hand to stay quiet as her insides are spread around its shape and cooled by the liquid inside it. Mewling softly at the sensation of being fucked slowly, while Choso continues to lick her clit.
The thought that he is using her pussy like a toy makes her body burn with arousal and shame, squeezing tighter around the bottle being fucked into her cunt.
“You're going to warm this up for me, Yuuji”
The teasing continues, his movements fast enough to give her pleasure, but nowhere near what she needs. And when Choso suddenly pulls the bottle out of her body and she feels the telltale wetness between her legs as she is made to squirt onto the floor, she might as well combust; his tongue continuing to spoil her sensitive clit through it, ignoring the mess as he repeats the action over and over again, before pressing the bottle back inside her soaked cunt fully. Building a steady rhythm with it and his tongue.
The feel of it has Yuuji’s toes curling, moaning desperately as she comes with violent intensity, unaware of when Choso's hand took the place of her own over her mouth, muffling her sounds behind it.
His tongue works her through the peak of pleasure, mouth sealing around her oversensitized clit once he pulls the bottle from her pulsing body. Pushing her through each aftershock with gentle dedication before finally letting her go. Just so he can remove the condom from the bottle, pop it open, and drink its entire contents with a look of deep satisfaction.
Choso stands over her and watches her with a pleased smile on his face in the aftermath of what he just did to her. His intense dark eyes filled with burning desire.
And yet, despite it, he chooses to hold her close and carefully work her dress back onto her body. Letting her rest in his lap, and against his chest; using his coat to as a blanket, keeping her warm and comfortable while he croons softly to a song her foggy brain can not recognize.
Eventually, once her body and mind have finally settled, he lays Yuuji on the upholstered bench and sets himself to the task of cleaning the room quietly. Not wanting to leave evidence behind which might lead people to realize what they were really up to. Finally taking her by the hand to lead her home once he is done.
Yuuji's brain is still pleasantly fuzzy when they leave the kareoke hall, her body moving on autopilot; held close throughout their ride home and carried to their front door from the station, completely unaware of anyone around them who might stare or question her state.
Choso only sets her down when they arrive at their doorstep, unlocking their home and allowing her to enter first, before he presses her against the door as soon as it is closed, lifts the back of her dress, and buries himself inside fully inside her without preamble the moment they’re alone.
The feel of his thick cock spreading her messy cunt wide around it, reaching deep inside her in the familiar way she has come to crave and love, has Yuuji moaning shamelessly, glad to be back in the privacy of their home.
He does not move right away, instead he presses against her, anchoring her with the weight of his body while marking his claim onto her skin in between kisses and bites to the back of her shoulders and neck. All while his hands roam everywhere they can reach, eventually coming to rest at her hips; holding them in place so he can fuck her hard.
Yuuji feels like her brain is melting, her desperate moans accompanied by the rhythmjc wet slap of their skin meeting as her older brother fucks desperately into her pussy, pressing against all the best spots with each battering thrust, finally giving her what she's been begging for all along until she's coming untouched around his pulsing cock. Close to losing her mind when she hears him moan long and low and feels the wonderfully familiar warmth of his cum flooding her insides.
Reveling in the feeling of Choso pressing deep inside her, and holding still to let her milk him dry.
“I love you, Yuuji. Onii-chan loves you so much. You're mine, Yuuji. Only mine”
He grips her face and turns her head to kiss her messily, letting her whisper against his lips.
“Love you nii-chan, please…please keep using me, I want it. I belong to nii-chan”
Her older brother takes her words to heart.
For the rest of the night and over the next two days, the collar does not come off.
Yuuji quickly becomes accustomed to the weight and feeling of it around her neck as well as the casual way she finds herself filled with cock whenever Choso feels like using her body for his pleasure. Until Yuuji can not go a moment without feeling Choso's cum dripping out of her well fucked holes or spilled down her throat.
She loves it, loves how easy it is to give into her brother's whims and not have to think of anything other than how good it feels to pleasure him and be pleasured in turn.
Bent over every piece of furniture in their house at his whim, and mounted like an animal when she is on her hands and knees on the floor.
And by the end of their weekend, she can't help but preen happily at being spoiled by him; bathed and massaged into relaxation, then held close on his lap and kissed tenderly in between bites of her favorite foods and snacks. Watching a movie and talking about their plans for next week.
“Thank you, Yuuji. I really enjoyed this weekend. I…I don't know why yet. But thank you for humoring me”
A blush rises to Choso’s face, and Yuuji is happy to know that she can make him happy and he can feel safe to share his desires with her.
“I wasn't humoring you, I like it. I think it's really hot when onii-chan is a little selfish. But if onii-chan feels guilty–”
She smiles, shifting on his lap so she can kiss him sweetly over and over again.
“- he can make it up to me. I want nii-chan to do something with me…but it is very naughty”
Choso's grip tightens on her hips, while she kisses the bridge of his nose, right over the unique birthmark which adorns it. His voice a deep rumble when he responds.
“Anything. I'll do anything for you, Yuuji”