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It's late at night. Late even for Yukio, chronic overworker. It's quiet, and the dim lighting in the dining hall makes it seem like time is at an impasse.
Rin has stayed up waiting for him. His tail swishes in the air with apparent happiness, creating a small air current. He's sitting beside Yukio, staring at him with a wide grin on his face, and waiting for Yukio's review on the latest dish he has learned how to make.
It's warm, and hearty, and spiced to hell and back. It's Indian in origin, if the turmeric-citric taste is enough of a clue. Rin loves to make dishes like these, with spiritually protective spices. It's something he decided to learn by heart, after being influenced by Osceola back when they were fighting Illuminati. People like that have always stuck with Rin. He says it's good for the kids. It is, but as the little brother Yukio has a duty to uphold — he won't ever tell Rin he's right.
"Yukiooo, you have to tell me if it's bad," Rin says, his patience finally having run thin. Yukio doesn't resist the urge to roll his eyes. Rin hasn't made something "bad" in at least thirteen years.
"Nii-san. You know it's good."
Rin's answering smile splits his face in half. It shows off his fangs, both sets of them, and they glint in the low light. "But it needed your approval! And now it can be for the kids who are feeling under the weather or something, since I can make it in a pinch."
Yukio sighs. "You should stop spoiling them. They keep asking for you when you're away on missions, and there are only so many puppy-dog eyes I can tolerate."
"They ask for me?" Rin says in wonder, as if he isn't the infamous son of Satan who volunteers his help in schools. The warmer (stupider) one, at least.
Yukio keeps his mouth shut. A confirmation will only make Rin's ego grow bigger. Rin's tail doesn't hide his excitement at the thought, though. It wags like a dog's, undulating in the air.
Yukio could never walk around with something like that out, so outwardly displaying his emotions. Not to mention how every major demon they've met has berated Rin for having one of his weak points so easily exposed. But Yukio has always wondered…
“Nii-san. How does it feel?”
Rin’s tail slows down in its movement. His head is tilted quizzically, and his mouth is stuffed with not-so-fresh naan. “How does what feel?”
Yukio sometimes forgets that they can't actually communicate telepathically.
“Having a tail.”
Rin hums. He chews while he thinks. Astounding. A miracle will happen soon if he keeps that up.
“It was really, like, a lot at first. I could sense so many new things. My balance was fucked for a few weeks, I remember that very clearly. I kept bumping things with it, and it hurt like a bitch.” He swallows the bread down. “Why ask about it now, though?”
Yukio shrugs, and goes back to licking his plate in the most subtle way he can manage — by grabbing some naan and cleaning the remains of the sauce with it so he can have a last taste. “Just curious.”
“Were you jealous?” Rin wags his eyebrows. Yukio glares at him. He's not about to confess to that. “It was like having another dick, actually.”
Yukio's right eye twitches so hard the lense in front of it breaks. Rin bursts out laughing at him, pointing and sputtering.
Yukio frowns at him. “Nii-san! Are you mad!?”
“Oi, it really did feel like that!”
“Hah!? Then why walk around with it out!?”
“It was worse if it rubbed against my skin!”
“And just what the hell was worse!?”
“I kept getting turned on!”
Yukio's jaw audibly clicks shut. He sits his butt back down, having stood up at one point, and fishes a new pair of glasses from inside his messenger bag. He blinks, trying to ground himself.
“Huh.”
Rin eyes him warily. He slowly sits back down, too. They match each other's energy well, they've always had.
“So… nii-san's tail really is sensitive.”
“Yeah, duh.”
Yukio frowns, sensing an impending headache. “Then I have to insist. Why have it out, if it really is… like a penis.”
“Oh my god, say dick like a normal person.”
“Penis,” Yukio rebukes.
Rin's lips tremble as he tries to smother his laugh. He takes a deep breath to calm down, mumbling a sutra he has half-memorized (he swaps verse two for John 7:26, somehow) for things like this. “Let me put it this way. Imagine you're me, at the ripe old age of fifteen years old.
“Disgusting, but continue.”
“Oi. Be nice. Now. You're a teenage boy, hormonal and confused. You suddenly grow a new limb that is very, very sensitive. You have to hide it under your pants, but it twitches when excited and rubs against cloth and you can feel it, and now it's like one of those snakes that eats itself. A viscous cycle.”
“Vicious,” Yukio corrects. “The snake would be an Ouroboros.”
Rin snaps his fingers. “Yeah, that's the bitch."
“Nii-san, you hunted one down three months ago.”
“Yea, that's why I remember it!”
Yukio takes a very deep breath. “I guess I can see how it's similar to a penis.” Before Rin can ask, Yukio says, “Your tail, not the snake. But, nii-san, you've grown. Can't you control yourself now? Having it out like that even now, isn't that…”
Exhibitionism? Whorish behavior? Should Rin be in demonic jail for not keeping it in his pants? His tail, Yukio means.
“You can say it's slutty,” Rin himself supplies. “I don't mind. I know Amaimon thinks so.”
Yukio feels a twitch in his left eye. Rin is knowingly walking around with the self-defined equivalent of a penis just– out. Yukio’s so close to killing Rin and then himself.
“Shouldn't nii-san know better?” Yukio sighs. “You've had a tail for over five years. I'd say this is verging on shameful.”
Rin chokes on his own breath. “Oi…”
“Nii-san,” Yukio says, just to get under Rin's nerves. “It's very improper.” He sees a small blush crawl up Rin's cheeks. He zeroes in on it, since it's an unusual response to his teasing. “It's impolite.”
“Uh-huh,” Rin says, slightly dazed. That's… really odd. Yukio has to dig in further.
“It's basically exhibitionism.”
“Sure is.”
Yukio stares at Rin, at how red he's become, at how much he's squirming. A lightbulb goes off inside Yukio's head. “It's on purpose. You're… asking for it.”
The hair on Rin's tail stands on end, fluffing up. It starts whipping around, slashing the air. Yukio, out of a blind need that seemingly had been festering for a while, stands and grabs it forcefully, stopping it short. A shiver visibly crawls up Rin's spine. His shoulders are tense, and he can't meet Yukio's eyes. His nape is bright red.
“Whore,” Yukio whispers.
So quiet Yukio thinks he imagined it, Rin whimpers.
It's like a thread snaps. He tugs on the tail ungently to get Rin to stand up, and a choked-off moan rips out from his throat. Trembling, Rin covers his mouth, and stares wide-eyed at Yukio.
I want to hurt you, Yukio thinks meanly.
“Stand up.”
“O-oi, Yukio, what…”
Yukio tugs on the tail again. Rin lets out another weak moan. “Stand up, or I'll make you.”
Rin's pupils shake. Unsteadily, he stands. His knees are turned inwards, and he's hunching down. It's what he used to do when he was trying to hide a hard-on. Another mean streak shakes Yukio. He wraps Rin's tail around his hand, and strokes it softly with his fingers. He leans in to whisper into Rin's pointed ear.
“Did it feel like this, nii-san?”
Rin shakes his head. Yukio pulls on the tail, and Rin, for once in his life connecting the dots, starts talking. “You're touching me.”
Yukio blinks, suddenly coming out of whatever role he put himself in. “What does that mean?”
“Haah. I wouldn't have survived this a few years ago.”
Yukio blinks some more. Rin seizes his chance and sets himself free, but turns to hold Yukio's hands between his own. His gaze is heated. His tail whips back and forth.
“Yukio. Yukio, let's go to my room.”
Yukio gulps saliva down. He doesn't know what came over him — is Asmodeus back? Is he lurking around?
“I– nii-san, you want this?”
Rin raises his eyebrows, hands on hips. “You're stupid. Let's go.”
Yukio takes offense to that. Rin grabs Yukio's hands again and leads them to his room. On the way, Yukio comes to an understanding: Asmodeus was a feeble excuse his mind came up with. This persona, this desire he has… it's all him. He thought he'd gotten over the denial, the repression. Embers still remain, apparently. Rin has a penchant for situations that make Yukio get over himself.
Rin's room here is similar to the dorm they'd shared together at the True Cross academy, that haunted old thing. There are two beds pushed to the walls, desks between them, and barely enough space for Rin to swish his tail around. Ah, memories. It's even a little musty.
“I see you wrinkling your nose,” Rin says. “I'll open a window, mom.”
Yukio holds himself back from answering that, setting his bag on the floor.
“And don't worry, Yukio, it's just us here. We can make, you know. A lot of noise.”
I'm going to make you scream, Yukio thinks.
“Lie down on your stomach.”
Rin pouts. “What, no kiss?”
Yukio stares at him, unimpressed. He crosses his arms like he doesn't actually want to do it, like it's too much trouble.
“Just kidding, damn! We don't have to, then.”
No, they're going to. Yukio crosses the space separating them in two strides, and holds Rin's jaw between his fingers. He makes sure Rin is looking him in the eye before he leans down to kiss him, immediately slotting their lips together. He makes it quick and dirty, not giving Rin any chance to adjust, and when he decides he's done, he backs off, only for Rin to chase him for another taste. Yukio basks in that power — until Rin decides to be a little bitch and bites Yukio's bottom lip until it smarts. Yukio pushes him away, appalled, and finds Rin has a shit-eating grin on his face.
Before Yukio can kill him, he rushes to jump on the bed to the right. His clothes go flying one layer after the other. His red-hearted boxers land on top of the pile. Rin rolls over and sticks his naked ass out, inviting Yukio in. He sends another grin over his shoulder.
Yukio grinds his teeth audibly, stomping towards the bed and barely restraining himself.
He grabs Rin's tail by the base and yanks on it.
“Fuck!” Rin shouts, panting hard. “S-stop, it hurts!”
“You think you're funny?”
“Heh,” Rin breathes out, his toes curling. “I think I'm hilarious.”
Yukio feels his eyebrow twitch. Doesn't Rin understand the situation he's in? Yukio has him now. He yanks on the tail again just to remind Rin, and gets an answering wail.
“Tell me, nii-san. You're into the pain, aren't you?”
Rin hides his head in the pillow, his tail swishing in distress. Yukio snatches it with his free hand and begins stroking the fluffy end. It squirms in his hold.
“You wanted this, right? Someone to play with you?”
Rin nods, face still buried. His hips twitch. He probably doesn't know what to do with himself, whether to lean into Yukio or try to get away. That's okay. Yukio will make the choice for him. He wraps Rin's tail around his right hand, like he did earlier, and holds the base between two of his fingers. He begins massaging it, making small circles with his thumb and pressing in deep. Rin's breath picks up. His feet try to kick out, and his hips try to lean away from the stimulation, only for it to have the contrary effect thanks to Yukio's hold — Rin ends up making Yukio tug on his tail all by himself. However muffled, Rin's moaning into the pillow.
“Yukio… please…”
He's so terribly easy. It's a wonder only Yukio has really taken advantage of it.
“Please what, nii-san?”
“Touch me!”
Yukio can’t help but be mean. He presses his thumb deeper into the muscle of Rin's tail. “I am touching you.”
“Fuck, Yukio, touch my cock!”
“I think you should come like this.”
All of Rin’s movement stops. He swivels his head around to squint at Yukio. “You wouldn't.”
Yukio feels a smirk split his face. If this were one of the animes Rin watches, the light would be reflecting off his glasses sinisterly. “Try me.”
Rin shivers a little. “Uh… please don't.”
Yukio huffs out a mean laugh.
“Oi, you're actually scaring me.”
“Good.”
Yukio pushes Rin’s head back into the pillow by the nape, and pulls on the tail until Rin is wailing again, his back muscles visibly contracting with effort as he tries to get free. Yukio doesn't let up. He does, at least, let Rin turn his head to the side so he doesn't suffocate. He's nice like that.
“Fuck, Yukio, please, please touch me somewhere else.”
“Alright, nii-san.”
Rin shouldn't have let that up for Yukio to interpret. Yukio releases Rin's nape to search for a packet of lube within his coat pockets — Yukio is thoroughly prepared, however neurotic Shura thinks him to be. Before Rin can breath out a sigh of relief, Yukio has opened the packet one-handed and emptied its contents on Rin's rim. Rin's entire body twitches.
“Fuck, that's cold! Yukio, you asshole–”
Rin clamps his mouth shut when Yukio plunges his entire index finger inside him. His hand is still wrapped around Rin's tail.
“You were saying?”
Rin tries to glare at him through teary eyes. He's trying to hump the bed, so Yukio thinks he's still enjoying it. Besides, Yukio knows Rin both adjusts fast and is very much into rushed prep. Rin couldn't be more of a raging masochist if he tried. Shiemi has told him so, when she was tipsy enough.
As Yukio opens him up — one finger leading into two leading into three — with no real relief for him, just the constant push and pull of his tail, Rin thrashes on the bed. He'll grow claws and shred the sheets soon, Yukio's sure of it. He's not even slightly worried about the cheap polyester blend. All he cares about is the tight grip Rin's hole has on his fingers, and what will replace them soon.
Yukio pulls his fingers out. At Rin's complaining whine, Yukio tugs on his tail. The whine only becomes higher in pitch.
“Are you that desperate, nii-san? For someone to fill you up?”
Rin's hole visibly clenches. “Yeah, yes, please.”
A shiver runs down Yukio's spine. He feels on top of the world like this, with Rin at his mercy.
Okumura Rin, the Blue Flame, bastard son of Satan and savior of the known world, knight-class exorcist when the classification mattered, on all fours for his own brother. Cock red and dripping and thoroughly neglected, because he's good, he hasn't even tried to touch himself, and begging to be filled up.
Yukio can't deny himself anymore. He takes his own cock out from within his pants, spits on his palm and lubes himself up, groaning as he can finally take some of the edge off. He curses as he lines up. His eyes find Rin's teary ones. Yukio feels a mean smirk splitting his face in half. His nasty competitive spirit makes a reappearance and says, I fucking win, as he pushes inside Rin.
He's not gentle with it. He doesn't give Rin time to adjust as he bottoms out. Once he feels tight, wet heat fully enveloping him, it's like he blacks out, and all he can do is chase his own pleasure. He thrusts into Rin with abandon, not caring whether he makes it good for him, and aiming only instinctively for the spot that makes Rin clench down on him. When Yukio finds it, he can feel the shiver that travels through Rin's spine as if it were his own body, as if they were a positive feedback loop.
Yukio fucks into Rin, and Rin tries his best to meet his thrusts, but Yukio's rhythm doesn't let him keep up — it's erratic and selfish. The asynchronization makes Yukio not-so-accidentally tug on Rin's tail every time Rin's hips move back, and Rin's grip on Yukio's cock turns vice-like each time. Yukio can barely move inside now. He feels like a single twitch will hurl him over the edge, but if he comes first it'll be humiliating. He can't have that sort of loss on his record.
“Fuck, fuck, fuck, fuck,” Rin repeats as if it were a mantra. He's visibly trembling, the hair on his tail fluffed up. Yukio was so gone for a moment that it's only now that he realizes it's tickling his arm. Before he loses himself again, he has to make Rin come first.
“Nii-san,” Yukio says. He pointedly thrusts into Rin. “Nii-san, have you ever played with your tail like this?”
“F-fuck you,” Rin pants. So that's a yes.
“What made you come the fastest?”
Rin apparently has enough of a brain left to weigh his options, debauched as he is. Yet, he doesn't know what Yukio's planning. Good. Rin seems to settle on answering truthfully.
“Stroking it closer to the base does me in like, really quickly. I once experimented with putting it in– nevermind.”
Yukio's interest is piqued. He connects the dots fast, jumping to a conclusion as if it were the floor and he's three stories up. “You tried to fuck yourself with it?”
“I said nevermind!”
Yukio starts thrusting back in, this time fully in control of himself. He's rhythmic and precise, and times his thrusts with strokes on the base of Rin's tail like he's jerking it off. He can see Rin losing himself again, eyes rolling back.
“Pervert,” Yukio tells him. Rin whimpers loudly. “Degenerate.” Yukio leans down to whisper into Rin's ear. “Such a slut, nii-san.”
That's when Rin comes. He screams and thrashes wildly, legs kicking out and claws poking holes into the sheets. He's only making it worse for himself, since Yukio has a steady grip on his tail, and he's making Yukio pull on it. There are blue wisps of fire licking at his skin. His cock is rubbing on the mattress, and he can't hold himself up anymore. If it weren't for Yukio, he would've landed on his own mess. As it is, Yukio holds him up one-handed, so he can thrust back in and paint Rin's insides white.
It's like Rin's hole is milking him for all he's worth, with the way it clenches around him. Rin twitches full-bodily every time Yukio buries himself deeper into him, and Yukio can feel it too. The small wisps of fire keep appearing and traveling from Rin to Yukio, and only fade away when Yukio's done coming.
Yukio really tries to compose himself and sit straight, but he's trembling and Rin's a dead weight now. He collapses on top of Rin, trying to catch his breath.
After their breathing slows down to a normal frequency, he feels Rin shaking with laughter.
“Holy shit.”
Yukio huffs out a laugh. “You really did come untouched.”
“Haah, I thought I was gonna die!”
Yukio smiles against Rin's skin. He kisses his nape softly. “But you did it. Good boy, nii-san."
“Ack, don't say that to me. I'm fucking beat.”
Yukio files that away. He pulls out gently — ‘Fucking– hate that feeling, get off me,’ Rin says — and rolls over on his side, carefully unwrapping his hand from Rin's tail. He visibly twitches again, oversensitive. Yukio kisses Rin's shoulder in apology.
“Didn't know you'd get like this after,” Rin comments. “You're a softie.”
Yukio wrinkles his nose. “You're delirious.”
“After that?” Rin nuzzles his face into the pillow. He peeks at Yukio with one eye. “I wouldn't be surprised.”
Yukio averts his eyes. “Let's clean up.”
“Noooo, let's stay here…”
“Nii-san, that's disgusting.” He moves to stand up, but Rin wraps his hand around Yukio's wrist, alert and staring into Yukio's eyes.
“Don't leave me,” he pleads.
Oh. Yukio feels something tug at his heart. Pesky little thing.
“Alright,” he concedes.
Rin lets him go only so Yukio can take the rest of his clothes off, deciding to sleep in his underwear even though he has packed a pajama set, and setting his glasses on the desk. He has to reach over Rin to get to his bag for a disposable disinfectant wipe, and gets elbowed in the stomach for his trouble. Rin wraps himself around Yukio as soon as he's done. His tail loops around one of Yukio's thighs. Yukio sighs softly, endeared. He kisses Rin's forehead, caressing his jaw with his thumb, and holds him even closer.
Rin nuzzles into Yukio's neck. “Thank you, Yukio.”
“Of course, nii-san.”
Yukio doesn't drift off until he's sure Rin is sleeping soundly.