Chapter Text
Nitori liked to think he understood Rin pretty well, maybe more than anyone else. Because he understood that there was more to him than the grinning boy he had fallen for when they were kids and there was definitely more to him than the harsh teenager he roomed with. He needed to prove himself and that was a feeling Nitori could relate to. But as the older boy’s lips pressed against his he could honestly say he hadn’t seen it coming.
His greeting still lingered on his lips, quickly replaced by a hot swipe of Rin’s tongue. Rin dropped his bag and the door slowly closed with a click, the movement enough to pull Nitori out of his surprise attack stupor. “S-senpai?”
“Shut up.” he growled. A familiar feeling of fear and arousal coursed through Nitori and he nodded, allowing himself to be dragged to the bottom bunk. “Strip.”
He nodded again, keeping his gaze glued to the other boy, waiting for the punch line.
Rin had never shown any real interest. He knew that always wanting to be alone was just bravado but romance had never once entered the equation. Not that Nitori hadn’t thought about it, he thought about it a lot. Rin was anyone’s fantasy and being roomed with him didn’t exactly help lust levels, but that’s all it was. Fantasy.
Except now he was on his stomach with his ass in the air. “Senpai!”
“Shut. Up.”
“B-but-“
Rin leaned in close, erection pressed against his ass, lips against his ear. “Don’t you want it?” He chuckled darkly, “I know you do. I’ve heard you. At night when you think I’m asleep. I’ve heard you moan my name.”
The boy looked down, blush burning his cheeks. “...Rin.”
Nitori felt him smile before he straightened again. “Exactly. Now shut the hell up.”
He did just that, fixing his attention to counting threads in the sheets. He felt like his cheeks would catch fire with how embarrassed he felt. To think that Rin had known the entire time and to now saw him naked and shaking. If it weren’t for the strong hand that gripped at his hip he probably would have run and hidden already.
Something made a squirting sound behind him and suddenly what seemed like a manageable freak out turned into full blown hyperventilating. His senpai was going to finger him, was going to fuck him. Nitori was so busy worrying about it that he hadn’t even noticed it happen.
A spark of pleasure ran up his spine and he realised there was already a finger moving in him. Rin was moving too fast, sliding in a second finger before he was ready but he didn’t even care. He was hardly new to anal but his fingers were small and he could never get the right angle. The boy he had fantasied about all year was three fingers deep in him and he couldn’t care less about the pain or what he’d feel like in the morning. Clearly Rin was finished being considerate though because he roughly pulled out his fingers and covered himself in a thick layer of lube.
“I-I can’t! Senpai I’m not ready!” he tried to turn to face him but was kept still.
“Shut,” Rin lined up their hips and pushed in, “up.”
He bit his lip hard to hold back his scream, tears welling as Rin began to thrust.
It was too much. It was just too much. Even as pleasure set in it was too much. Rin was mostly silent, providing only a few low grunts and a slapping sound. Nitori though was a mess. He sobbed openly, wails mixing with his moans as the pace increased. He could tell it displeased Rin that he was making so much noise but he couldn’t stop.
It only became worse as his stomach began to clench, on the cusp of his orgasm. “Senpai! Oh God...Please I’m going to...” the words bubble thick in his throat.
With a sigh Rin reached around and started to jerk off the smaller boy, fucking harder into him as he did. He came first in hot bursts inside him and Nitori came crashing after a few strokes later.
They panted side by side for a few minutes, the air between them settling and each of them calming down. Nitori was still on the edge of crying but really he was too tired. Instead he closed his eyes, content to just sleep. Rin stood silently, grabbing a towel and heading to the showers, leaving him in darkness.
--
Nitori woke up in Rin’s bed the next morning, tucked under the blankets and alone. There were no signs of his room mate or where he had slept the previous night but on their small desk was a can of coffee, granola bar and a fresh package of wet wipes.
Walking was nearly impossible and without even looking in a mirror he could tell he looked like hell. Caffeine and something for his jelly belly did wonders, but not as much as the wipes. Just getting rid of the crusty cum of his legs was enough to make him feel like he could face the day, or at least the showers.
Classes were pain and distraction, but the real hurdle of the day would be swim club. He would have to see Rin and he would have to actually move.
“Hey Nitori! It’s your turn in the lane” Seijuro called with a laugh. “You’ve been real sluggish today. Rough night?”
Nitori grimaced and nodded, feeling a blush begin to creep up his neck. “Uh-“
”Hey.” Rin barked, tugging off his cap and goggles. “I need you to time me.”
Seijuro shrugged, “If he doesn’t mind.”
The youngest nodded quickly, grabbed a timer and clipboard. It was a relief for once not to have to swim. He could just relax and take some time to heal. His and Rin’s eyes met and he could have sworn they looked almost apologetic.
Was he doing this on purpose do he didn’t have to swim?
Of course Rin would never say it, he was too proud. But Nitori could have sworn he was sorry for how roughly he treated him the other night.
And he definitely didn’t see that coming.