Chapter Text
It was just supposed to be another one night stand, and although he was never opposed to the relationship developing further, he really hadn't been thinking about that. He just wanted relief. He wanted to feel good and forget the stress and worries that came with being a Pro-Hero. It was just difficult to try and date because not everyone realized he was Dynamight. That wasn't typically something he could disclose right away. After all, the world didn't need to know about the Pro-Hero's sex life and his personal habits. He had an image to maintain.
He had been at his go-to bar, sipping on a drink with his friend, Eijiro, who was also now a Pro-Hero. His last one night stand had been a total failure. The guy was nothing Katsuki had hoped for in the bedroom. He had no interest in hooking up with him again.
As they were chatting, Eijiro nudged him with a smile. Katsuki subtly looked where his friend was hinting at. There was a man a few seats down devouring him with his gaze. He wasn't the type he would normally go for, but he couldn't escape that heated gaze. He had a smaller frame, but Katsuki saw promise in those eyes. That man wanted to push him down and fuck him to tomorrow.
So he approached him, not knowing he was already hooked, soon to be reeled in. He wanted him, that man was tempting him with his eyes, his body, his words. He knew he was Dynamight, he wanted him for everything that he was, Katsuki was sure of it.
He followed him to his place and nothing really seemed out of the ordinary. It was very plain, sparsely decorated room. He didn't really have time to think much past that when the man slowly started subtly leading him towards the bed. The man licked his way into his mouth, tangling their tongues together. Katsuki felt his legs hit the edge of the bed and let the smaller man push him up onto the bed. God, they'd only really made out but he was so-
He felt a hand on his chest, guiding him down to the bed. Yes, this is the kind of thing he wanted. He wanted to be dominated, he wanted to feel pleasure and not just give it. He shivered at the firm but quiet command to turn around. He complied, his excitement mounting. His shirt was stripped off, cold hands stroking along his back.
"So many terrible scars." The man sounded...sad? Well, he had said he was a fan of Dynamight so maybe the signs of battle and victories disappointed him.
"Hmph, I'm not the only one who ends up with scars. My opponents come out much worse."
He was proud of his scars, they were the results of his labor and hard work. They were the signs that he had gotten injured but still made it through on top and alive. The hands continued to stroke his back, a quiet hum rising from the other man.
"Oh, I'm sure. After all, you're a hero protecting all of...us." Katsuki thought the way he said it sounded a bit off but he brushed it off.
The man's hands travelled down to his pants, tugging them down along with his underwear. Fuck, this was it. Now they were really going to get to good stuff. He was so horny just thinking about it, basically melted when he felt a spit-slicked finger enter inside of him, quickly followed by a second finger after the man must have judged Katsuki could take it. And he could, Katsuki had a habit of pre-prepping himself at least a little so he could get a dick inside of him sooner.
But he would still feel a little pain, a little stretch as those skilled fingers stroked inside of him. Fuck, how was a guy like this good at fingering. He was an unassuming, pretty average looking guy, one who could melt into a crowd and not be seen. But apparently he knew what he was doing. Katsuki couldn't hold back his voice, small little pants and moans escaping him.
God, he just wanted this man to slam his dick into him and make him see stars. His own dick was almost fully erect, dripping precum. He was lost in the pleasure, eager for more. Excited for more, he couldn't wait for this man to make a mess of him.
He had no idea what was coming, but his vision began to shake. There was what seemed like a terribly long delay before he registered a throbbing pain resonating through the back of his head and rattling his skull. He tried to turn his head to look at the man, to see what had happened out of nowhere but he wasn't able to before he fully collapsed onto the bed, completely blacking out.
*
He wasn't sure how much time had passed until he groggily came back to consciousness, the back of his head throbbing. But apparently enough time had passed that he had been tied up in a way that prevented him from using his quirk. His hands were stuck on his face, even his wrists were bound. He also realized his ankles and waist were tied down. He was also completely naked.
He couldn't fight the urge to squirm, but all that did was make the ropes feel tighter. He wasn't sure if was alone, just the man was there, or if there multiple people around. It seemed like was still on the bed, or on a bed.
Then suddenly he heard a familiar nickname, one that made his stomach twist.
"Kacchan, are you awake?"
He felt a hand tangle into the back of his hair, pulling just hard enough to raise Katsuki's chin. He could barely see anything between his fingers due to how they were tied so he could only make out the vague shape of a face. The man's hair still looked black and there was what looked like some discoloration on his face, but other than that he couldn't really make out anything else.
"Did you have a nice sleep?"
"D-deku?" Katsuki asked weakly.
If it was really him...he hadn't seen him in over ten years. Once Katsuki had gotten into U.A, they had completely gone their separate ways. After all, there was no point worrying about a quirkless guy becoming a hero or getting in Katsuki's way if he couldn't get into the same high school. Deku's voice had changed so much, it was so much deeper, more dangerous. It had been completely unrecognizable, but it made sense. 14 year old Deku wasn't going to sound the same now that he was in his mid-twenties.
There was silence following his words and the grip on his hair relaxed and disappeared.
"Yes, I suppose I've been called that. Yes, I even call myself that. Yes, I suppose I am. A useless, quirkless guy. Someone who's not anywhere near your level. Someone who would normally never enter your radar. Someone who shouldn't even breathe the same air as you." Deku mumbled, sounding so close yet so far. Katsuki couldn't figure out quite where he was. He must be somewhat close since he'd grabbed his hair.
Deku's words hurt. It was obvious he had continuously internalized every cruel word he had said to him growing up. He wanted to apologize, he needed to apologize, but how he could he explain away what he had done. It wouldn't make the pain and suffering Deku had gone through for years magically go away.
"Ah, but if we're talking about scars, I probably have you beat. I'm sure they must be even more hideous to look at, your hatred towards me..."
God, why did he have to be such a stupid kid? Why did he have no impulse control, no healthy way to deal with his anger and frustration? Why did Deku have to shine so brightly despite being quirkless?
No, that wasn't right, it wasn't Deku's fault. He had always wanted to be close with him but Katsuki had pushed him away, physically, emotionally. It hadn't made sense to him that a quirkless kid could have such big dreams, have such a bright light, could be so carefree, naive, hopeful, happy, driven, appealing.
Right, it was his fault. He didn't know how to handle and respond to his own feelings. He didn't want to be around someone who made him feel so much, so many conflicting emotions that raged inside of him and came out not only in the form of cruel words but misusing his quirk on Deku. Not once, but over and over.
Why had he been such a foolish kid? How could he have been so cruel? Deku hadn't done anything wrong, the one in the wrong was him.
His hands started to spark due to his uncontrollable emotions before the sparks faded.
"Dek- No, Izuku, wait, please listen to me, I-"
"I was sad I might never see you again, so I always watched you. No matter what you did to me, you were always my number one, I was your number one fan but to you, after U.A, I was nothing." Deku continued on like he hadn't even heard him. Katsuki could tell now that he was above him, close but not touching him.
"No, Izuku, please, I'm sorry."
"I wanted to kill you so many times," Katsuki felt the rope around his neck tighten, pressing into his throat. "But I always, always, always loved you, I wanted you, I needed you to see me, I couldn't let you forget me after all you had done. Because I always remembered. How could I forget, when it's been burned into my body over and over and over and over." The rope loosened again as Deku stopped pulling on it. Katsuki coughed as soon as he was able to breath more air again. He tried to look at Izuku's face but he still couldn't see much through the rope.
"Sorry..." Katsuki wanted to say more, wanted to convey so much more but Deku kept going.
"I thought so hard and for so long on what I wanted to do. I wanted to burn myself into you, engrave myself and my feelings into your skin like you did to me. But I want more than that. Even if you one-sidely burned your hate into my skin, I didn't want to do the same. I want you to choose to do it." Katsuki flinched as he felt Deku's body pressing down into him, one hand stroking his bare chest.
He couldn't understand what Deku meant. How exactly was Deku intending to engrave his feelings into him, and why would he ever chose to do it? Why would he ever do something like that?
"You are going to want to become mine." Deku finished by pinching one of Katsuki's nipples, causing electricity to run down his spine. "Because wouldn't you desperately want the forgiveness of the one person you were truly a villain to, Mr. Pro Hero Dynamight?"
"What bul- nonsense are you saying? I can apologize, so please stop this." Katsuki's words were failing him, he couldn't figure out properly what he should say. He was barely processing the situation, barely understanding Deku's words. He felt he could only breathe through his mouth due to the slight panic he was feeling, truly starting to realize the compromising situation he was in.
"Oh my," Deku said flatly, but somehow sounding very slightly amused. "You've become so cute now. Have you finally matured a little, Kacchan?"
Katsuki wanted to retort but Deku took advantage of his mouth being slightly open and grabbed his tongue between his thumb, index and middle fingers. Katsuki flinched at the unexpected touch, unable to do anything while Deku lightly pulled on his tongue.
"Hmm, but I think we both know an apology isn't enough," Deku's fingers stroked the top of his tongue, causing him to squirm. "I mean, anyone can say an insincere 'I'm sorry'. And do those words truly make up for everything? You made it so I can't forget you, so it's only fair I do the same, right?"
Naturally, Katsuki couldn't really answer while Deku was holding his tongue, so Deku continued talking.
"Kacchan, did you know that the mouth can also be an erogenous zone?" Deku released Katsuki's tongue but only to move two of his finger towards the back of his mouth, slowly and gently stroking the top of his throat. Katsuki couldn't hold back a muffled groan. "I wanna make you feel so good. I wanna make sure you can never forget me..." He pulled on the rope around Katsuki's neck again with his other hand. "And never leave me, Kacchan."
Fuck, Katsuki knew he was a bit of a masochist, but he couldn't believe he was feeling a little turned on. He never knew it felt so good to have his tongue and throat touched like that. He wanted more but goddamn was this situation fucked up. He was thinking all about himself again and not about Deku. Not about apologizing and rectifying this situation, not about stopping things from going to a place they wouldn't be able to return from.
As though Deku knew his thoughts, he said: "Ahh, it seems you're a bit more masochistic than I thought. Why are you getting a little hard already? I've hardly even done anything." He could feel Deku staring at him even though he couldn't see his eyes very well. It was probably the gaze that had gotten him here in the first place, a gaze that wanted to devour him.
Katsuki almost whined when Deku pulled his fingers out, it had felt so good. It had made him crave something else pressing into that spot repeatedly. Deku pulled the rope tighter, enough to lift Katsuki's head off the bed.
"Do you like feeling helpless, Kacchan?" It sounded like a sincere question but it made Katsuki shiver with lust. God, he was awful. He had done something so horrible, he still needed to properly apologize and instead he was getting fully hard having a rope pressing into his neck.
"Izu..ku...I...mmph, st-ah-p..." Katsuki thrashed his legs, his face burning. This was getting to dangerous territory. He might actually pass out.
As though Deku had heard his thoughts, he completely released the rope and Katsuki flopped back onto the bed, panting heavily.
"Ha, who would have thought a quirkless nobody like me could get a high and mighty Pro Hero so hard despite barely touching him." Katsuki was too embarrassed and horny to respond, clenching his fingers into his face. "I know you would never have imagined something like this happening ten, no maybe even three years ago. But it is. How do you feel about that, Kacchan?"
"Sorry, I'm sorry." Katsuki muttered. He flinched when he felt a finger trace from the bottom of his dick to his tip, where he was leaking precum.
"This is how you express your remorse?" Deku sounded angry, twisting and rubbing his finger into the tip of Katsuki's dick. There was no reason that should make Katsuki want to cum, but it did. He had to fight the urge so bad, his cock throbbing with a need to release. "... You're a slut, Katsuki."
"Yes..." Katsuki moaned, Deku saying his name sent him over the edge. He came from being called a slut. He came from being called by his name by a man who both loved and hated him. He didn't hear anything for a while other than the sound of his own panting breaths as he came down from his high.
"Wow, I think this is going to be easier than I thought. You know it probably helps that hate is also such a strong emotion, it means you're still consumed by thoughts of that person. I think we can bring such strong feelings back to the surface. What do you think, Kacchan?"
"Sorry, I was wrong..." Katsuki said weakly, his consciousness quickly fading.
"Don't worry, Katsuki, I'll treat you very well. After all, I'm different from you."
The last thing he felt was a hand stroking his hair before he fully passed out.