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Raspberry Lemonade

Summary:

"Okay then, Sae-chan." Ryuusei leans forward, all sharp teeth and honed predation. "Break the tension for all of us and kiss your little brother."

What Ryuusei expected was for Sae to throw him a disgusted look, maybe for Rin to try and slug him. He didn’t expect to watch Sae and Rin make eye contact, for Sae’s gaze to flick up and down Rin’s body and for Rin to swallow hard with dilated pupils.

“That’s all?”

Notes:

I was so excited to get this as a prompt! You know how much I love these three losers. Happy Birthday, Ryuusei! You deserve some incest, as a treat <3

Enthree, my dear friend, I had such fun creating this for you, so I hope you enjoy it. Thanks for always being willing to whore out Sae with me <3

Work Text:

"This is stupid." Rin complains, petulant like the little sibling he is. Sae says nothing, but his eyes reflect the sentiment. 

 

"It will be fun, Rin-chan!" Bachira, properly drunk, tosses back another shot like water before plopping down on the floor across from him. 

 

At this point in the night the party has wound down. Empty beer cans litter the floor and smoke hangs heavy in Nagi's apartment. It was 2am and there were only three people still down to party; Bachira, an insanely cross faded Reo and, of course, Ryuusei.

 

The demon flashes Rin a smile that would be more suited for the cover of a nature documentary on hyenas, “That’s not a no, RinRin.”

 

Reo cackles and Rin would punch him if it weren’t Reo’s money that bought all this alcohol. Really, Rin should punch him anyway, because it’s the alcohol’s fault that Sae rolls his eyes and leans back against the couch, gesturing with his down-to-ice lemon sour.

 

“Just take your turn, Rin.” 

 

The empty tequila bottle is cool under Rin’s fingers as he spins it with a huff. Watching it go in circles makes him nauseous. He blinks, and when he opens his eyes the bottle is landed on Reo. Ryuusei and Bachira whoop and cheer as if something exciting happened.

 

“Fine. Truth or dare, Mikage?”

 

“Truth!” Reo nearly sloshes his drink as he leans forward and slurs. “Gimme your best, Itoshi.” 

 

It figures Reo would choose truth after being dared to chug the last of the fireball last turn. 

 

Rin has to think to even come up with something to ask and takes a long sip of his raspberry rum. He really doesn’t pay attention to Reo much outside of the field. He glances around the room for ideas. Nagi is passed out on the futon in front of the TV where he and Isagi had been engaged in a heated mario kart competition. Reo was always hanging out with him. Hanging all over him, carrying him like a child. 

 

“Is carrying Nagi around like a kid some sort of kink or are you like his servant or something?”

 

Reo *does* spill his drink this time as Ryuusei howls with laughter.

 

“It’s not- I’m not his- It’s not like that! We’re just friends!” Reo blurts out. 

 

Now, Rin may not know much about friends but he’s fairly certain friends don’t make out in the locker rooms when they think no one else is around. He doesn’t care either way. He got his turn out of the way. 

 

Reo spins and ends up getting Bachira to draw graphic depictions of genitalia on Barou’s peacefully sleeping face. Bachira in turn gets Ryuusei to strip down to his boxers. His very tight, neon pink boxers. 

 

“My turn!” Ryuusei spins the bottle so hard it goes airborne for just a moment before flopping around in a frenzy. Past Bachira. Past Reo. Past Rin. Right to Sae. 

 

Sae blinks at it with dread settling on his shoulders. 

 

“Sae-chan~” Ryuusei sing-songs. Sae visibly tenses despite the amount of vodka in his blood. 

 

Pretty teal eyes slip closed and he answers before Ryuusei can even ask. 

 

“Dare.”

 

When his eyes open there's a challenge behind them, far too clear for someone that was downing lemon sours not even half an hour ago. Ryuusei sees it like a neon sign. 

 

"Okay then, Sae-chan." Ryuusei leans forward, all sharp teeth and honed predation. "Break the tension for all of us and kiss your little brother."

 

What Ryuusei expected was for Sae to throw him a disgusted look, maybe for Rin to try and slug him. He didn’t expect to watch Sae and Rin make eye contact, for Sae’s gaze to flick up and down Rin’s body and for Rin to swallow hard with dilated pupils.

 

“That’s all?” Sae is already moving forward, crawling over the short space that divides him and Rin. 

 

All eyes are on Sae as he slides into Rin’s lap as if he’s never belonged anywhere else. Ryuusei doesn’t miss the way Rin’s hands find their place in the dip of his brother’s waist, as natural as breathing. 

 

“Nii-chan, are you sure?” Rin asks. His eyes ask questions Ryuusei can’t interpret, a conversation for Sae alone. 

 

Sae quirks half a smirk and brushes their lips together lightly. “Don’t be so lukewarm, Rin. Show them.”

 

That’s all it takes for Rin to surge in and for Bachira to start cheering. Reo is stunned into silence. His drink is dripping onto the carpet. Ryuusei can’t pull his eyes away.

 

Heat seeps into his blood. The two most beautiful people he’s ever seen are making out in front of him as if they’ve done it a million times before and, god, does that idea make him flush even hotter. 

 

In all honesty, he’s kissed Sae Itoshi before. It was intoxicating. Vivifying. Hot as fuck. 

 

With the knowledge of what Sae’s lips feel like it’s easy to put himself in Rin’s place. But his brain rejects that idea immediately, He doesn’t want to be Rin. He wants to be behind Sae leaving marks on his neck that Sae will surely be pissed about later. He wants to watch Sae get taken apart by the one person that shouldn’t touch him like this. 

 

Ryuusei’s cock throbs hard in his ugly neon pink boxers. He needs the Itoshis. Both of them. 

 

Sae pulls away from Rin when he’s breathless. His cheeks are pink and his lips are suckled swollen. “Good enough for you, perverted demon?”

 

“Nope.”

 

Ryuusei pops up from his seat, uncaring if his boner nearly smacks Reo in the head. He pulls Sae up by the bicep and starts dragging him down the hall knowing Rin is following from the expletives being thrown after him.

 

Nagi’s room is messy. There are clothes on the floor and the trash can is overflowing with tissues. Ryuusei pulls Sae into the room just in time for Rin to catch up to them. Sae shakes Ryuusei’s hand off with a scoff.

 

“What the fuck do you think you’re doing?” Rin is in Ryuusei’s face in an instant.

 

“Obviously, I’m going to ask Sae-chan to suck me off.” Ryuusei revels in the way rage takes over Rin’s face. 

 

“Say that again you freak-”

 

“Rin.” Sae’s voice stops Rin cold. 

 

Sae is slipping off his sweater and folding it neatly.

 

“Nii-chan?” 

 

Sae gives Ryuusei a haughty look, the kind he gives on the pitch to an opponent that tripped up in front of him. He lets his jeans drop to the ground and steps out of them calmly. Ryuusei is sure his veins are going to pop.

 

“Let’s show Ryuusei how you really kiss me.”

 

Rin swallows hard, eyes wide and uncertain until Sae gives him another look Ryuusei can’t read. Then he nods and fucking smirks at Ryuusei. 

 

“Pay attention, Antennae.” 

 

“WOOO!” Ryuusei throws himself on the bed, a hand already cupping his cock over his boxers. “I knew you two were a wet dream. Show me, show me! I want it all!”

 

Rin strips down until he matches Sae in just being in underwear. Sae points to the bed and Rin lies down on his back next to Ryuusei like an obedient dog in anticipation for a treat. 

 

He drools like a dog, too. 

 

Rose eyes track Sae as he steps over to the bed and gracefully ditches his underwear. Ryuusei sucks in a breath. He’s going to die. He’s going to nut harder than he ever has and then die. He’s going to die because Sae Itoshi has a pretty pink pussy already shiny with wetness. 

 

“Fuuuck!” He yells, “I can’t believe you’ve been hiding such a cute little cunt from me!”

 

“It’s not *for* you.” Rin growls. 

 

“Enough talking, Rin.” Sae climbs on the bed, keeps going until his thighs are framing Rin’s head, pussy so close to his little brother’s open mouth he can feel his breath. “You know what to do.”

 

Ryuusei isn’t sure if Sae drops his hips or if Rin pulls him down to lick up and down in broad strokes. The way he moans into his brother’s pussy should be illegal and it makes Ryuusei scramble to throw his boxers to some corner of the room and grip his cock tight. 

 

“Shit, fuck, that’s so hot.” His mind swirls with questions, dirty images, filthy possibilities. “How long have you been fucking your little brother, Sae-chan? Have you let him pound that tight pussy yet?”

 

“Shut u-up!” Sae snaps at him. 

 

He works his hips to grind against Rin’s willing tongue, twists his fingers into silky dark hair for a better angle. Ryuusei strokes himself in time with Sae’s movements, eyes glued to where Rin is sucking his brother’s swollen clit. Rin does something with his tongue that has Sae gasping and arching his back. His thighs start to shake. He’s so close that even Ryuusei can feel it. 

 

Ryuusei takes a risk and reaches up with his free hand to tug on a perky nipple. Sae all but screams as painful pleasure shocks through him. 

 

“Do that again.” It’s a demand that Ryuusei is happy to comply with. Sae’s pink nipple pebbles between his fingers and he rolls it against the pad of his thumb. It’s not good enough. Sae glares down at him. “Harder.”

 

“Say less.”

 

The next tug has Sae throwing his head back. His thighs tighten around Rin’s head and he pants for gulps of air. 

 

“Rin, keep- Hahh, yeah. Fuck don’t stop, Rin.” 

 

Even as he speaks to Rin, Sae’s eyes are on Ryuusei. A silent command for more. 

 

Rin laps over Sae’s clit in broad strokes, pausing only to suck hard on it. Sae's thighs shake, his back arches into Shindou's hand, and with a broken moan he cums. 

 

Slick splashes over Rin's face and he drinks it up like fine wine, moaning and bucking his hips into nothing. 

 

Ryuusei is mesmerized. He watches Sae move down to sit his soaked cunt right over Rin's hips as he takes a breath to come down. 

 

"RinRin." Rin turns his head to Ryuusei, looking entirely blissed out. There's nothing Ryuusei wants more than to see those turquoise eyes on him more. He wants Rin to focus on him too. With more confidence than he feels, Ryuusei rolls onto his side and catches Rin’s lips with his. 

 

No punch to the throat comes. 

 

It takes a few seconds, but Rin leans into it, opens his mouth for Ryuusei to explore and lick the taste of Sae from Rin’s gums. 

 

"You're sharing today, Rin?" 

 

Ryuusei opens his eyes to see Sae in his peripherals, sitting like a king on his throne, grinding his pussy over Rin's straining cock. 

 

"Nii-chan," Rin groans into Ryuusei’s mouth, unwilling to pull away, "either let me fuck you or get off."

 

"Tch. You're such a bratty little brother."

 

"And you're a shitty big brother."

 

"I don't care who's shittier, are we fucking or what?" Ryuusei sits up and fists his cock shamelessly. 

 

Both Itoshis look at him. And then at each other. 

 

Sae slowly moves off of Rin at the same time Rin sits up to face Ryuusei. 

 

"One rule." Sae says as he drags a finger over Ryuusei’s lips. "My pussy is only for Rin."

 

"That's it?" Ryuusei grins. His teeth graze Sae’s finger but the other doesn't flinch. "I don't mind watching RinRin ruin your sweet cunt, but you have other holes I can work with."

 

Sae moves closer. His hands dip down to Ryuusei’s chest, lower and lower, until he's gripping the base of Ryuusei’s cock. 

 

"You're a sick bastard."

 

"I'm not the one fucking my brother."

 

Sae makes a face at him that melts into a moan. Ryuusei’s hand has made its way to sinking two fingers into Sae's cunt. 

 

It's scorching hot and gripping around him like Sae is trying to pull him deeper. 

 

"Didn't you fucking hear him? His pussy is *mine*." 

 

Ryuusei sticks his tongue out at Rin. "Does it look like he's complaining?"

 

And, no, Sae isn't complaining at all. He's rolling his hips against Ryuusei’s palm with hazy eyes. The squelch of it makes Rin drool like a Pavlov'd dog. 

 

Questions plague Ryuusei’s mind again. How long had Sae been training his brother? Did he fuck Rin the night Ryuusei kissed him? Are they about to make his wet dreams reality?



“Nii-chan…” Rin shuffles so that he’s behind his brother, chin on his shoulder and hands on his waist.

 

“It’s f-fine, Rin.” Sae tips his head back to let Rin steal a kiss. “I’m still yours.”

 

Ryuusei is fairly certain he wasn’t supposed to hear that last part, thus he ignores it and instead pulls his fingers out to lick them clean. Rin gives him a glare so Ryuusei does the only thing he can think of. He shoves those fingers in Rin’s mouth. 

 

“FFuuggh-!!” Rin tries to yell, but Ryuusei is already fucking his fingers in and out of Rin’s lips. Spit and slick smear over his lips and Ryuusei watches Rin’s sharp eyes dull just a bit. In and out, in and out. Rin’s tongue joins the motion and laps between Ryuusei’s fingers searching out any trace of Sae he can get.

 

The alcohol thrumming in his blood doesn’t help the dizzy feeling Ryuusei gets from watching Rin lick and suck his fingers.

 

“I bet you look even better sucking cock.” He presses his fingers down on Rin’s tongue right before Rin’s teeth clamp down. Ryuusei doesn’t even pull away. “What? You don’t want a thick cock in your throat?”

 

Rin rips himself away before grabbing Ryuusei by the hair and dragging him forward, trapping Sae between them.

 

“No. I think you’d look better choking on my dick. It would shut you up.” The burn in his eyes is a cocktail of lust and raspberry flavored rum. Ryuusei is okay drinking that up.

 

“Maybe next time, RinRin. Right now, your nii-chan’s gorgeous body is just begging to be ruined.”

 

With nothing but brute strength, Ryuusei spins Sae around and pushes him against Rin’s chest. He pushes Sae’s hips up with one hand so that he’s hovering over Rin’s fat cock. That hand moves to grab Rin and hold him steady there. He gives him a light stroke up and down. 

 

“Shit, RinRin. I didn’t realize you were packing.”

 

“Shut up.” “Shut up and put it in.” The brothers speak at the same time, sending Ryuusei a look so similar it would be funny if it didn’t make his dick throb. 

 

Slowly, he pushes on Sae’s hips to tell him to drop down. On top of messy sheets in a room that smells like sex and alcohol, Ryuusei gets the absolute pleasure of watching Sae Itoshi get split open on his little brother’s cock. Sae’s wetness slides down Rin’s dick like holy water.

 

Sae bites down a moan as Rin bottoms out. His hands shake reaching out for Ryuusei. 

 

“Come on,” He puts a hand on Ryuusei’s neck and pulls. “Didn’t you say I needed to be ruined? That I have other holes to work with? Get to work, my demon.”

 

It’s not hard to find the half empty bottle of lube on Nagi’s nightstand. It’s one of the big ones with a hand pump on it for gods sake. Ryuusei would bring this up to mess with Nagi later.

 

Rin has started rolling his hips just enough to make Sae bite his lip and whimper.

 

“Let me see that ass, Sae-chan.” Ryuusei’s words make Sae lean more into rin, arching his back so Ryuusei is treated to the view of his tight ass presented just for him. 

 

The lube is cold on Sae’s skin, but it heats up fast with Ryuusei’s fingers rubbing and dipping into his asshole. The first finger is a tight fit that Sae whimpers through. 

 

“Don’t tell me you haven’t broken this hole in, RinRin.” A second finger makes both brothers moan. Ryuusei can feel Rin’s cock pulsing through Sae’s walls. 

 

“Hurry the fuck up.” Rin hisses. His jaw is set tight with the effort of keeping still. Sae shifts in his lap, bouncing lightly on Ryuusei’s fingers. 

 

“Just put it in. I can take it.” 

 

“Famous last words.”

 

The sound Sae makes when Ryuusei presses inside inch by inch could rival the singing of angels. His voice chokes on air and those gemstone eyes roll back. 

 

The slide is euphoric. Hot, tight, pressed up against Rin’s cock with only a thin wall between them. 

 

“F-full.”

 

Ryuusei laughs and shifts closer. The new angle has Rin moving to kiss Sae’s gasp away. 

 

“There we go, Sae-chan. Just take it.” 

 

Like a finely tuned instrument, Rin and Ryuusei move in sync. Ryuusei slides out, Rin moves in. Both of their hands on Sae’s hips rock him back and forth like a doll. The prettiest damn doll Ryuusei has ever seen. 

 

“Do you like this, Sae-chan? Being full of cock?” Sae opens his mouth, probably to snap at him, but a sharper thrust of Ryuusei’s hips twists the insult into a high pitched keen. “That’s what I thought. RinRin is feeling pretty good, too, right?”

 

“Nii-chan’s pussy is the best.” Rin agrees. His eyes are still blown out with intoxication; of raspberry rum and the lemon sour flavor of Sae’s lips.

 

They push and pull Sae back and forth on their cocks faster, pushing his hips down to take them deeper. 

 

“R-Rin! Ryuu-” Sae chokes on his moan again. His thighs quiver under Ryuusei’s hands. He digs his nails in just to feel Sae tighten around them. 

 

He meets Rin’s gaze over Sae’s shoulder and doesn’t even have to ask for Rin to meet him halfway, tongues clashing and teeth scraping raw lips. 

 

“So tight. You close, RinRin?” 

 

“Fuck. Yeah.” Rin turns his head to nip at Sae’s jaw. “Gonna cum inside you, nii-chan. Get you pregnant. Make you mine.”

 

“Holy shit.” 

 

No sooner do the words leave Rin’s mouth than Sae is clamping down on them and suddenly there’s a spray of wetness over their laps. It doesn’t stop as they fuck him through it, rougher, deeper now, chasing their own release. 

 

Rin’s rhythm stutters to a full stop, buried deep in Sae’s soaked cunt, spilling hard inside his brother. 

 

“Fuck. Fuck . He’s going to knock you up. You’re fucking filthy, shit .” Ryuusei falls head first over the edge. He’s sure he blacks out for a moment, only coming to when Rin is gently maneuvering Sae to lie down. 

 

Ryuusei pushes his sweaty hair back. Rin takes a breather next to him before huffing and punching his shoulder. 

 

 “We’re not done yet, freak.” He looks to where Sae is opening his thighs, showing off the cum dripping from both of his used up holes. They would apologize to Nagi about his sheets later…maybe. 

 

Rin grabs Ryuusei by the hair again. “Nii-chan doesn’t like being left dirty.”

 

Ryuusei thinks he’s reached nirvana. 

 

“In that case…Itadakimasu.”