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Izuku is covered in love bites— No, not like that, but literal love bites—and it was his. he doesn’t know why he does it. He just always has the urge to bite his boyfriend off for no reason.
It wasn't intimate nor gentle; he bites hard, like a starving dog, yet Izuku doesn't question him; he doesn't tell him to stop it, so who is he to stop satisfying his own temptations?
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The first time it happened was right after their training session, when they were the last ones in the locker room changing back into their uniforms.
He could hear his boyfriend mumbling down the shower hall, a small walking white noise machine.
Then he sees it.
He fucking sees it.
"Izuku."
"Yes, Kacchan?" he says with the softest, gentle voice that warms his heart.
Just as he got up, he hovered right into his personal space. He sees it. A small freckle is making home on the tip of his nose. It looked comically like a small explosion, like a mark of him.He suddenly feels a surge of frustration take over him, like he wants to just squish him to— Without thinking, he lunged forward and bit Izuku's nose hard, gritting his teeth, when he still felt that frustration building up on the core of his chest, causing Izuku to yell in surprise.
"O-ow! Kacchan, let go!"
No, he can't.
"I no' no wan'a" He growls, though he's sure Izuku can't tell. He still doesn't feel satisfied; he still has that frustration in his chest that won't go away. He let go for a bit to look at the freckle again, but it made everything worse. He leaves a kiss as a silent apology but goes right back into biting it.
It was so fucking cute. So fucking adorable, and he loves it, so what's going on? What's making him jump impulsively?
He finally lets go when Izuku lets out a sad whimper. Did it hurt? He kisses it again, as if that would soothe the pain.
Izuku starts rubbing the sore spot. The corners of his eyes glistened with unshed tears. He feels bad, he thinks. Does he? His face was flushed with embarrassment and a tiny bit of satisfaction when he saw he had left a mark.
"O-owh, wanna tell me what that was about?"
He technically lost his mind, so fuck, how does he explain this? Sorry that I saw a new freckle that looked so adorable cause it resembled a lot like one of my explosions, and that made me so frustrated and tempted me to just bite you and maybe eat you.
"So you bit me because you found me too adorable?"
Fuck him for picking up on Izuku's uncontrollable mumbling. Can't escape this one, though. What the fuck does he look like? a pussy?
"No."
Yeah, he is.
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The second time it happened was during their internship. They were in the break room with half-and-half, Izuku blowing off his ears with a new technique he just thought of, his mouth rapidly moving a hundred miles an hour. He jabs half-and-half's ribs lightly whenever he thinks he's not paying attention to Izuku's rambling. Fucking pay attention, damn it. That's my boyfriend, whom you're talking to, you're lucky.
"Any questions, Todoroki-kun?" He smiles, brightening up the room and fluttering his eyelashes in anticipation.His chest constricts at his angelic smile, but then it gets ugly. He could feel the vein in his head pop. That sudden frustration was building up like bile in him.
"Fuck."
The same thing happens. He lunges himself forward, making both of them plummet down onto the break room table. Kissing him hard, viscously, and biting down on his lower lip, earning a small moan. Then he just stays. He just stays still as he keeps biting his lips, changing spots every second. Just bites.
"B-Bakugou? Midoriya?" Even Todoroki was weirded the fuck out.
He only let go when he heard footsteps approaching the door, hero Burnin' entering. "What's up you kids? Oh? Deku, what happened to your lips?"
It was swollen, a small mark of his teeth forming again. "N-nothing, just got p-punched a while ago. No worries."
"Yeah? like with teeth?"
He could see the nerd turn red like flame, possibly putting Endeavor to shame.
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Those scenarios continue to happen, and Katsuki doesn’t question his movements anymore. Just uses the excuse that his body moved on its own. Izuku stops squirming under his hold whenever he does it. Deciding that letting his boyfriend do his thing would be better.
It happens at the most random time.
Whether it would be them in the middle of the kitchen cooking, eating with their friends, in the break room with the sidekicks around, in the cafeteria, at class, or during their intimate moments where Katsuki would just pause at kissing his boyfriend and bites. This went on every day for a month. It became a regular occurrence.
They were both in bed, with Izuku between his legs, back laying on his chest and his arms wrapped around his waist while he was biting the soft skin on his cheek. Canines in deep, a tiny trail of saliva going down. He could clearly see that his boyfriend was covered in his bites. There was one under his chin, a finger in both hands, one on his forearm, and a small one on his neck, just right under his curls. It felt innately possessive, but he didn't do it to leave marks. He just feels the need and want to bite, like it was second nature to him.
"You’re doing it again, Kacchan," he says, gently trying not to seem annoyed.
"W'ah do you me’n?” Yeah, he is not letting go of that hold on his cheek. Feels soft.
“Do you know the reason why you get the urge to bite me?" That caught his attention now; he stopped questioning long ago. It's probably a natural thing for couples, right? same thing as kisses? “I don’t know, and I don’t care. Now, stop talking. I’m not done yet with your other cheek.”
He switches his side to another cheek but gets interrupted when he feels Izuku’s hand placed against his mouth and pushing him back slightly. He feels a bit hurt by the rejection.
“Hey, don’t give me that face. I just needed to ask something, okay?”
Fuck, he feels like a baby, but whatever, as long as he gets back to biting those soft cheeks. “Okay…” he pouts, just to add on and make his boyfriend feel guilty.
“Well, it’s because you love me.”
“Okay? and that’s it?”
“No, I meant like, you love me, find me adorable, you get overwhelmed with it sometimes, and you being you, this is just another way of taking those out. On me.”
Well, that makes sense as he thinks more about it. Everything about Izuku was adorable. His own affection for him erodes all the corners of his heart, shaped exactly like his boyfriend, and this was his own way to show it. Is that why he feels like exploding whenever he doesn't get to bite him? pinch him? why he feels like eating him? Yeah, it makes so much fucking sense now.
“It’s called ‘cute aggression.’ Did you know that? It suits you, Kacchan. It suits us.” Huh, it does.
“That's all? I told you I’m not done yet. Other cheek, now.” He demands.
“Fine!” he says as he rolls his eyes fondly and tilts his head, presenting the unbitten cheek, which looks neglected and abandoned. Poor baby. Was he being dramatic? whatever.
“Izuku, baby?”
“Yes, love?”
“Love you.”
"I love you more.”
bite!