Shinsou knows he has a problem. The thing is, it didn't become a problem until Kaminari — well, maybe Shinsou didn't really know how bad it was until Kaminari.
Shinsou first notices during one of their classes. He is absently chewing on his pen, the end rolling back and forth between his teeth as a kind of odd tick that helps him focus. He looks up and Kaminari is watching him like a hawk, eyes glued to the pen as it rolls smoothly between Shinsou's lips.
He didn't think much of it at the time. But, then Shinsou slowly starts to notice Kaminari staring at him more, those electric eyes trained on him at the strangest times - Shinsou wasn't even doing anything, or at least nothing he was aware of. Thankfully, or not, Kaminari isn't subtle and lacks a filter where most people tend to be pretty reserved.
"You know you have a gnarly oral fixation, right?" It's said with a smile, or maybe it's more a smirk, but Kaminari is sitting on top of Shinsou's desk during one of their breaks and it's the first thing out of his mouth as he leans into Shinsou's space. "I've seen you chew on pens, pencils, your fingers, straws, chopsticks… Never seen someone so desperate for something in their mouth before."
There is nothing subtle about the way it's said or how Kaminari looks at him while he says it. "You seem very interested in what goes in my mouth… Any reason why?" Shinsou kind of surprises himself by engaging. Kaminari is pretty, very pretty. He's also a social butterfly which is the exact opposite of everything Shinsou stands for. But, he doesn't mind Kaminari, he actually enjoys the ray of sunshine that he is compared to Shinsou's storm cloud persona.
"I have a few - Wanna find out?" Kaminari asks, a mischievous grin aimed directly at Shinsou.
Honestly? He does, and Shinsou has no idea what to do about it except for nod and watch the way Kaminari's face lights up at the subtle gesture. "I was hoping you'd say that. I'll show you tonight."
Was it supposed to be that easy?
Apparently, it was. Kaminari practically skips back to his desk and Shinsou spends the rest of the day wondering what he's gotten himself into.
At exactly two minutes past eight there's a knock at Shinsou's door. He finished his homework, showered, and had dinner while he waited to see when exactly Kaminari would show up. He'd be lying if he said he wasn't nervous, and for the life of him he can't figure out why.
"You look nervous, Shinsou." Kaminari is grinning, bright and ridiculously amused in Shinsou's doorway. He changed into a pair of shorts and a soft looking white tee that says 'Sushi Slut' on the front in ugly orange letters. Oddly enough, Shinsou can't help but think it suits him.
He's tapping one bare foot on the floor as he tilts his head and eyes Shinsou like he's trying to solve a puzzle or take one of Aizawa's tests. "You don't have to be nervous. I don't bite, at least I won't, not until you ask me very nicely."
He's walking into the room, ignoring Shinsou's stunned face, and spinning in circles while admiring how Shinsou has set up his room.
"I didn't think you'd show up." Shinsou's voice breaks near the end and he feels a flush begin to roll up his neck. Kaminari just grins like he always does, easy and carefree, almost like he's always in control. The more he thinks about it, Shinsou is almost positive Kaminari does it on purpose. He's seen him drop the easy going facade during training, watched the way electricity danced alive and dangerous around his fingers - It's mesmerizing. And even now Shinsou is kind of mesmerized by the enigmatic blonde.
"With a quirk like yours you'd think you would be a better liar, Shinsou." There's something dark behind Kaminari's teasing words that makes the hair on the back of Shinsou's neck stand on end. "I'd say you were hoping I showed up. Did you rush through everything waiting for me to knock on your door? I bet you got through your homework in record time."
Kaminari isn't wrong, and he knows it judging by the way he keeps looking at Shinsou. "I, uh," What the fuck was he supposed to say to that? And why was he so nervous? This was Kaminari, kind, happy, endless smiles like countless rays of sunshine Kaminari. But, looking at him now Shinsou wasn't sure that description was right.
"You don't have to answer, I already know I'm right." Kaminari smirks as he sits on Shinsou's bed. "Stop standing there looking lost and come sit with me. I cant touch you from that far away."
Shinsou feels a little unsteady on his feet but does as he's told anyway, sitting on the bed just out of reach of Kaminari. He's never felt so out of place in his own room before and the way Kaminari is staring at him only makes it worse.
Shinsou isn't sure what to do with his hands, his body, hell he can't figure out where to look because he knows when he looks over those piercing yellow eyes will be locked on him. It's unsettling to have someone's complete attention, especially for Shinsou who tends to be overlooked or forgotten so easily because of how he is and because of his quirk.
He does it before he's even conscious of it, fingers going straight to his mouth in that nervous tick he's had for so long he couldn't control it if he wanted to. In an instant Kaminari is in his lap, ignoring Shinsou's startled grunt, and pulling Shinsou's fingers from his mouth.
"It completely defeats the purpose of me being here if you just do it yourself you know." Kaminari still has Shinsou's hand, but having him sitting in his lap is more distracting than anything else. He smells good, really fucking good and Shinsou cant quiet place what it is but its so familiar he knows if he could just… taste it he could pinpoint what it is.
Shinsou is still stunned when Kaminari releases his hand in favor of slowly trailing his index finger over Shinsou's lips.
"If you need something in your mouth that badly, you're welcome to use me." Shinsou sucks in a breath, completely thrown off by how forward and unashamed Kaminari is. His lips part just slightly and the tip of Kaminari's finger grazes the tip of Shinsou's tongue. It's shockingly intimate and the hungry look Kaminari is wearing makes it worse, or better depending on who you ask.
Kaminari looks so fascinated, that finger trailing over Shinsou's lips again and back into his mouth. Shinsou can't help the way his tongue chases that finger, can't help the way his lips wrap around it or how his eyes roll back as he moans when he gets a taste of Kaminari on his tongue.
"Fuck, Shinsou. Is this what you needed?" Kaminari asks, breathless with excitement. "Open, wider, that's right. Perfect."
With anyone else this would have been mortifying, but not with Kaminari. Shinsou opens his mouth, hands resting on the pretty blonde's spread thighs, and lets him slide his fingers into Shinsou's mouth. He's pressing on Shinsou's tongue, drool pooling and spilling over the corner of his mouth but Shinsou can't be bothered to care, not when Kaminari is looking at him with large eyes full of fascination and wonder, like Shinsou is worth looking at.
"I've wanted to do this to you for so long. After today I just couldn't take it anymore." Kaminari sounds as affected as Shinsou feels and it's doing insane things to Shinsou's head.
Shinsou closes his mouth around the digits again and this time it's Kaminari who moans, soft and broken as Shinsou sucks greedily at his fingers. Shinsou has never felt so light, so clear headed in his life. It feels like he's floating, floating on a cloud with the blonde siren in his lap and two perfect fingers in his mouth.
"F-fuck, fuck, Shinsou wanna try something, ok?" Kaminari sounds fucked out, like he's been riding dick rather than letting Shinsou use him like a pacifier. Shinsou realizes faintly that he's hard between them, and when he pulls Kaminari closer he finds that he's just as hard as Shinsou is.
Kaminari is looking at him expectantly and Shinsou just nods because he's fine with whatever this devilish creature wants to do so long as he doesn't take his fingers out of Shinsou's mouth.
Kaminari spreads his fingers and presses down on Shinsou's tongue again, encouraging him to drop his jaw and open his mouth wider. "It will feel weird at first, your mouth will go a little numb, but it's fine. Just tap my leg if you don't like it."
Shinsou nods again, curiosity getting the better of him as he looks into those chaotic yellow eyes.
He doesn't feel it at first, but he can see the flicker of faint yellow light that means Kaminari is activating his quirk. Shinsou has always found it beautiful. He loves to watch Kamianri in training, lightning dancing around him in perfect chaos. It's the most accurate way Shinsou knows how to describe him - chaos. Kaminari is the very embodiment of lightning, spontaneous and devastating, yet beautiful in the same way a lightning strike is - it leaves you stunned, paralyzed just like Shinsou is now.
Shinsou can feel the hum of electricity as Kaminari's quirk travels along his fingers and into Shinsou's mouth. There's a sudden spark of pain before his mouth immediately goes numb, just like Kaminari said it would. Shinsou, surprisingly, isn't bothered by it and doesn't find it unpleasant. Kamianri flips his hand and lets his fingers graze the roof of Shinsou's mouth, his quirk humming again as he sends another small charge of electricity pulsing through Shinsou's open mouth. It's bizarre and dangerous and Shinsou has never been so turned on in his life.
"I knew it, I knew you would like this." Kamianri sounds awe-struck, eyes watching Shinsou in amazement as his fingers play along his teeth and gums with gentle, electrically charged strokes. "You're incredible."
Kaminari runs his slim fingers over Shinsou's lips again and it feels like fireworks, like a million fireworks bursting over his lips before Kaminari is pushing them back in and Shinsou is left with even more drool pooling and sliding down his face.
Shinsou feels like he's losing his mind in the most glorious way possible. His hands tighten around Kaminari's waist and the little gasp it pulls from his lips has Shinsou groaning around his fingers. He pulls them closer, impossibly fuckin close, and uses Kaminari's weight to push their clothes erections together in a desperate attempt to find any kind of friction.
It works perfectly and Kaminari moans loudly between them. It's delicious and breathy and Shinsou sucks his fingers deeper, harder as he rolls their hips together. "F-fuck, Shinsou. Fuck, yes, don't stop."
It's too much and not enough and Shinsou is flipping them on the bed, Kaminari moaning beneath him when Shinsou refuses to release those sinful fingers from his mouth.
"Wanna kiss you."
Kaminari doesn't wait for approval. He pulls his fingers from Shinsou's mouth and grabs the taller boy by his wild purple hair and yanks him down into the most intense and messy kiss of Shinsou's life. He can taste the crackle of static on Kaminari's tongue as he pushes it into Shinsou's mouth and he's never felt so satisfied. Kaminari is passionate, possessive, and all consuming in his claiming of Shinsou's lips, his mouth and tongue. It's addicting and terrifying and Shinsou is sure he will die if Kaminari stops.
"Don't stop, please. Fuck, Kaminari don't stop." He's moaning and chanting it like a prayer and Kaminari just pulls him deeper, grinds his hips into Shinsou that much harder and Shinsou swears he's found heaven.
"W-want you in my mouth. Shit! Do you taste like this everywhere?" Shinsou nearly begs, drunk on the taste and feel of the boy beneath him.
Kaminari is pulling at his pants in frantic little jerks between moaning in Shinsou's mouth and palming him through his pants. "Come and find out."
Shinsou is sliding down his body so fast he almost tips himself off the bed. He helps Kaminari out of his shorts, both of them near breathless as they laugh at Kaminari kicking at them until they fall off the bed.
The second he's free, deliciously naked for Shinsou to enjoy, his mouth is on Kaminari's cock. It's pretty, like everything else about him, slim with a perfect pink head that has Shinsou's mouth watering instantly. He flattens his tongue along the shaft and takes one long, slow lick from base to tip just to savor the taste and feel of it. Kaminari arches off the bed, hands in Shinsou's hair, and tries to stifle the little moans and gasps falling from his lips.
Shinsou is utterly lost to it.
He licks every inch until it's glistening and wet and Kaminari's grip in his hair is damn near painful. When he finally swallows him down Shinsou hears him sob as the head hits the back of Shinsou's throat. He's licking and sucking and memorizing every inch of Kaminari's perfect cock while the boy whines and tugs at Shinsou's hair.
Shinsou is so lost to it he doesn't hear Kaminari's warning or hear the way his breath catches when his hips snap forward and he's spilling down Shinsou's throat with a beautiful fucked out wail. Shinsou drinks him down dutifully, cleaning every inch of him until Kaminari is pushing him off with a whine of "F-fuck, Shin, I can't. S-stop."
Shinsou releases the slowly softening cock with a pout and sits back to lick his lips. He can still taste Kaminari on his tongue and his only thought is doing it again — very, very soon.
"Holy shit, Shinsou. You're amazing. I don't think I've ever come so hard in my life." He looks stunning, half naked and sprawled out on Shinsou's bed with a bright red flush across his cheeks. Shinsou is still hard but it's the furthest thing from his mind. He wants Kaminari in his mouth again, wants to listen to him whine and moan as Shinsou devours him.
Kaminari glances up, looking almost surprised that his eyes were closed to begin with. His eyes meet Shinsou and he smiles, bright and knowing. "You want more, right?"
Shinsou hesitates, but the look in those amber eyes is all he needs. He's climbing over Kaminari's body to bring their lips together again. This time it's slow, less messy and more exploratory as Kaminari sighs happily into Shinsou's mouth.
"Can I have your fingers again?"
Kaminari laughs, light and airy and perfect.
"You can have whatever you want."