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When Niki had originally taken him in, Rinne hadn’t meant to stick around for this long.
Just enough until his idol career took off and he could leave this weird kid be. However, Rinne has to admit that he’s hit the jackpot.
How could he leave when he’s guaranteed homecooked meals, a warm bed to sleep in, and a divine cunny to fuck?
Niki makes the perfect wife, even at such a young age. He cooks well, and cleans the house. Though, as Niki has already hounded him countless times, that’s more because Rinne rarely feels like cleaning up after himself. It still counts.
Hell, he barely even batted an eye when Rinne drunkenly forced himself onto him the first time. That first time really had been an accident, as he had been perfectly fine with keeping a borderline inappropriate relationship with Niki through sharing the same bed as him.
The issue is that after the fact, Niki didn’t even seem to mind. Although alcohol soaks into the memory, he still fondly remembers taking Niki’s virginity in the bed that they share together. His hole sucked in Rinne perfectly, warm and clenching around his dick like his life depended on it. He didn’t understand why Rinne had done what he did, and he couldn’t quite explain himself either.
But every night after that when Rinne comes home, stumbling back from some bar or Live that ran on for too long, he’s made it an accidental tradition to slip into Niki’s pants. Niki doesn’t seem to mind as long as he doesn’t get any cum on his clothes.
Tonight seems to be the former. Some of his buzz has already worn off by the time he’s reached the front door, but he’s still plenty drunk as he staggers into the kitchen.
“Rinne-kun?” Niki’s tired voice echoes through the room. Rinne hadn’t even noticed his presence in the corner, standing in front of the rice cooker with a plate in his hand. He must’ve gotten up to eat, Rinne comes to the unavailing conclusion, before becoming quickly distracted by something else.
Niki’s attire.
Well, one very big part of it is all that he really notices in the moment— Niki’s shockingly slim frame is being completely overshadowed by a big, black shirt. Not just any black shirt, but a household staple of ‘NY’ in mismatched colors that is unmistakably Rinne’s.
Rinne lumbers over to him, pushing the plate and innocuous rice cooker out of the way.
“Hey, I was gonna eat that!” Niki immediately breaks out into protest, but Rinne pays him no mind as he saddles up right behind him. He can’t ignore how Niki’s body goes rigid against his own; just like how Niki probably can’t ignore Rinne’s cock pulsing against his ass through the layers of fabric separating them.
“You’re wearin’ my shirt,” he mumbles, his fingers dancing across the hem of the aforementioned item. Undeniably, Niki shudders against him.
“Jeez, it was an accident, Rinne-kun. I didn’t mean to.”
Of course, living out of the same closet will make it more likely for an accident of this caliber to happen. However, Rinne is more satisfied fantasizing about cute little housewife Niki missing him so much that he puts on his shirts for comfort. He wonders if Niki touches himself in them, just like he taught him.
Rinne doesn’t comment. Instead, he tugs the t-shirt off of Niki entirely, letting it fall to the ground unceremoniously.
He licks his lips, predator going in for prey as he lets his mouth clasp over Niki’s unsuspecting neck. Staking his claim on him with angry purple marks blooming all over his neck— wherever Rinne can reach at the moment. Niki lets out a sharp inhale with Rinne’s name on his tongue, and Rinne watches him scramble to grip the side of the counter so his legs don’t give out.
Rinne’s hand slides down and into Niki’s underwear, fingers immediately rubbing over his clit in clumsy, uneven movements. Not that Niki knows it’s clumsy, gasping and moaning all the same.
Niki is just so good. Rinne would be stupid to not acknowledge the obvious experience gap between them— Niki has only ever slept with Rinne. While Rinne is the one who initiated all of this, Niki has never refused at any step of the way. Rinne could even say that Niki likes this. He’ll take whatever he can get from Rinne when they’re like this: warm bodies rocking together in rhythmic desperation.
As a reward, his fingers slide down just enough to finally curl into Niki’s hole. He doesn’t waste time, pumping his fingers in and out with little resistance. Niki doesn’t spare the needy cries from leaving his throat. Rinne sucks idly at his neck, feeling the noises reverberate from there. It’s better music than he’s ever heard in a studio.
Compared to Niki, Rinne is huge, and the same goes for his fingers. Fortunately, Niki seems to idolize the size difference just as much as Rinne does— keening as Rinne presses a third finger inside. Niki attempts to clench his thighs around his hand, like he’s trying to wrench him deeper inside. It’s cute, but when Niki begins to squirm too much, Rinne secures his free arm around his torso.
Niki’s whole body shakes as he cums on his fingers, but Rinne doesn’t stop there. He’s still going.
Rinne can’t see his face from here, but he knows the exact face that Niki is making. His eyes have fallen shut and his mouth is hung wide open, like he’s focused on trying to memorize every touch and mark and wound that Rinne is creating on his sensitive body. Rinne knows it because he’s seen it countless times before— Niki’s cute blissed out face while he gets wrecked.
“Rinne-kuuuun, you’re teasing again,” he whines as Rinne shifts his palm to grind over his clit with uneasy pressure. There’s certainly a pout forming on his face, petulant in nature. Rinne removes his mouth from Niki’s neck, examining his handiwork. His neck looks as if he’s more bruises and bites than flesh and bones, but that doesn’t matter; he’s claimed.
“Nah. I’m makin’ ya feel good, there’s a difference. Don’t be greedy.”
“G-Greedy?!”
Between the two of them, Rinne is greedier and he knows it. He loves to use Niki’s body like it’s an extension of his own, holding him down and filling him up to his heart’s content. And Niki just lets him. He takes every inch of Rinne’s cock like it’s what he’d been put on this planet to do. The pleasure he gets from this is incomparable to anyone else. He might’ve ruined Niki for anyone else, but Niki has unknowingly done the same to him.
“Yeah, greedy. You wanna get fucked, or not?”
“Oh! Yeah, please,” Niki replies. Although he’s relatively trapped between the counter and Rinne, he works out enough space to shove his slick-soaked underwear and sleep shorts down until they fall to the floor and he kicks them away into the discard pile.
Niki is willing to strip naked in front of him, while Rinne hasn’t even removed one piece of clothing yet. He’s not sure if he wants to, with how arousing the power imbalance of it all is.
Rinne is a goner. Temptation burns through his veins the same way liquor does.
He lets go of the anchoring hold he had on Niki, removing his fingers from his wanton pussy as well. One might think he’s retreating, but far from it. He swiftly bends Niki over the counter, palm flattening against his back; his tear-stained cheek pressing against the cool marble. His feet dangle uselessly a few inches above the tile, too short to reach the ground. The only noise that Niki emits is a combination of a mewl and a gasp that only Rinne could label as sexy. He hastily undoes his pants just enough to remove his dick from its confines.
With his wet cunt on display, it’s impossibly easy to sink his cock inside— every urge of his hips feeling like a step closer to his own personal heaven. Niki is so small , warm walls clench around the large intrusion.
His cunny is wrapped around him perfectly. Rinne can’t stop himself from thrusting right away.
“You’re too deep…!!” Niki whines; contradicting himself in the process, as he tries his best to grind his hips down and against Rinne’s merciless thrusts.
“‘N you’re too fuckin’ tight,” he groans, but he’s not even sure if Niki can hear him over his own plethora of slutty moans spilling from his mouth. From the half of Niki’s face that he can see, he’s in complete bliss, his skin tinged pink. “Look at ya. You were made to take my dick, Niki.” Both parties are far too gone, rocking through waves of intense pleasure.
Niki does his best to nod— whimpers out a, “Yeah, yours!” before his body thrashes with his second orgasm of the night, spasming around Rinne’s cock in a way that makes his teeth grit.
His head is spinning, and it’s not just the alcohol. When did he turn Niki into this much of a cockslut?
… And how far can he go with it?
Rinne gathers up the sanity to pull out for just long enough to manhandle Niki into a new position, flipping him on his back. Niki is already too boneless to care, but makes the effort to moan as Rinne grabs him by the hips, sliding all the way to the hilt in one sloppy motion. Then he starts to move.
“Hah—! Onii-san, no more! No more!” Niki pants out raggedly, tearful blue eyes peer up at him, pawing uselessly at his chest and arms in an attempt to just hold onto something as Rinne fucks into him with reckless abandon. The poor thing’s been overstimulated. Too bad!
Rinne’s bleary vision casts down just enough to press a hand against Niki’s lower stomach. Niki whines some more, letting his head fall back against the counter with a concerning thump. Fuck, he can feel his own dick sliding against his palm from the inside. He even feels himself twitching through the thin expanse of Niki’s stomach.
“Look, even yer bottomless fuckin’ stomach can take me. Ya feel that, Niki?” Rinne asks, pressing down a little harder to get a reaction out of Niki.
Niki lifts his head up again, his gaze unfocused, but he’s still trying his best to look down and see what Rinne is talking about.
“So full…” he murmurs hazily.
“Yeah, ‘s like yer pregnant or somethin’, shit.”
“Thought you said— hah— I was too young to be a mama?” Rinne does remember that conversation, unfortunately. It’s not like he hasn’t thought about getting Niki pregnant— keeping him reliant on him as he gets older. But then he realizes that would mean a baby, when he wants all of Niki’s attention to himself already.
“You are. But it’s still hot to think about, y’know?”
“Yeah…” Niki blinks away some tears. He moves one of his little hands to cover Rinne’s on top of his stomach. “Make me pregnant anyway, oniisan.” Such a tender moment during such a display of lewd and hedonistic passion should be illegal, but Niki is just too cute to refuse. Damn it.
“Fuck, Niki—” Rinne buries himself all the way in before flooding Niki’s insides with white hot cum. Niki sobs beautifully as he twitches around his cock one last time.
This is worth it, Rinne is sure of it. He’s certain it’s not just the alcohol that makes him realize that he wants to stay with Niki forever— so good and beautiful, through and through. No matter how much he’ll bitch at Rinne.
“Hah, fillin’ you up with cum always feels so good,” Rinne pants out. Niki’s brain is fried, if the look on his face is anything to go by.
He moves to pull out, watching closely as the cum spills out of him and onto the counter. It’s messy and perfect.
“Oniisan…” Niki whines and extends his arms out. He seems to have forgotten completely about food for once, favoring Rinne’s touch and pulse instead. He gets like this sometimes, when Rinne has worked him up enough. Tonight is just his lucky night.
“Yeah, yeah. I got ya,” Rinne tries to not let all of his enthusiasm show as he picks Niki up, carrying him to their shared bedroom.
Rinne can already predict the next morning— a brutal headache and Niki complaining about the cum drying on the pristine countertop and between his thighs. But without fail, the same exact thing will happen again and again.
Like a moth to a flame.