He wants to ruin him.

 He wants to leave marks all over his body that will never fade. 

He wants to take him apart piece by piece. 

He wants to make sure that Izuku will never forget that he belongs to Katsuki and Katsuki alone.

Katsuki watches as Izuku and some extras talk by the gate, waiting in his car. The sound of laughter and yells from students around him going home are muffled, and the low hum of his engine fills the otherwise silent space. 

He stares at the group, his eyes narrowed, and his lips bared in a snarl. The expression on his face only screws up more in red hot anger as he watches a boy put his hand on Izuku's shoulder, red faced and clearly nervous. 

Katsuki knows what that fucker is thinking. He knows the signs of having a crush because so many others have had one on him. But he's only ever had his eyes for Izuku. He keeps staring, his tinted windows and the busy area not giving him away. Izuku steps away from the guys hand slightly, so smooth it goes unnoticed by the others in the group. 

The extra only steps closer, arms moving in an animated gesture as his mouth moves. Katsuki wants to rip his fucking tongue out. The cars in front of him are slow, busy picking up students. Katsuki is at least 5 cars away from the entrance, and it's pissing him off. 

He grips the steering wheel so hard his knuckles turn white, and he feels his fingers go slightly numb. He and Izuku go to different schools, so to make up for it, Katsuki picks him up sometimes. Katsuki's jaw is stiff as he bites his lower lip, trying to keep himself from speeding up and running that fucker over with his new car. 

Fucking finally a car moves and the rest follow, Katsuki not wasting time to keep the car moving even only for a second as he is forced to stop again. His anger only intensifies the longer he has to wait for these useless flesh bags to move their asses. 

Izuku had gotten popular, that fact is clear with how many people wave and say goodbye to him as they pass. It pissed Katsuki off to no end. He knew how amazing and perfect Izuku was this whole time while everyone else treated him like shit, and now everyone is kissing his ass? What the hell is up with that. 

Izuku seems to be taking the lead of the group now, speaking while everyone else listens attentively, almost hanging off his every word. The only person that gets to listen to Izuku's rambles is Katsuki. The only person who gets to watch those eyes light up in excitement is Katsuki. 

Izuku's gaze moves slightly and his eyes land on Katsuki's car. His eyes spark in recognition and then he turns back to his friends, a knowing smile on his face. Ignoring him. Katsuki can't help but bark out a laugh that has no sound of amusement. Oh, this mother fucker is gonna get it when he gets in. 

Katsuki honks, his hand slamming down on the center of the driver wheel with loud slaps that leaves stings on Katsuki's hand. Students turn to look at the car, Izuku included. But again, he turns away and continues his conversations. Katsuki feels his snarl twitch slightly and he puts the car in park.

Fine. If he wants to be that way, Katsuki will just have to force him to do what he wants. 

He opens the door aggressively, and slams it shut with a loud bang, gaining some attention. Good. Katsuki looks directly at Izuku and stomps over to him. Some of the cars behind him honk but he flips them off, not even turning their way. The group that is with Izuku stop to stare at him, slightly intimidated if their forced silence is anything to go by. 

Izuku smiles at him, and Katsuki glares, a grin on his face that radiates danger. Katsuki doesn't stop walking until hes right in front of Izuku, their height difference clear with how Izuku has to look up at him. But with the look in his eyes, it doesn't make Katsuki feel superior in the slightest. 

Izuku had that effect on people, that he was somehow better than most with just a look. It had gotten on Katsuki's nerves so bad in middle school, but that was before Izuku explained with a smile that he wasn't better than Katsuki, they were equals. Followed by Katsuki destroying Izuku's back and leaving burn marks in the shape of his hand all over his body. Katsuki understood after that. 

Izuku wears that same smile. 

"Get in the fucking car Deku." 

The command is harsh and sounds like its being ripped out of Katsuki's throat, deep and husky. The group around them stare at Katsuki like he just stabbed Izuku in front of them. The extra that touched Izuku so much in the time Katsuki was watching steps beside Izuku. 

"Do you know this guy Midoriya?" 

Katsuki glares at him and his hands spark slightly, little pops and flashes coming from them. He looks at Izuku. He knows what he wants. Izuku likes it when Katsuki is rough and forces him to do things. 

Katsuki likes that too, so he has no shame. His nerd isn't as innocent as he pretends to be, still even after all the things they do together he turns into a blushing mess when Katsuki says something sweet or remotely romantic. 

"Deku. I'm not gonna fucking ask again. Get. In. The. Car." 

Izuku tilts his head in question and grins at Katsuki. 

"What if i don't want to kacchan? I'll just walk home, there's tons of people here, I'll be ok." 

It's a taunt. Izuku thinks Katsuki won't drag him out of here with all these people? He should know that Katsuki couldn't give two fucks. So, Katsuki shoves the extra away and picks Izuku up like a sack of potatoes, slinging him over his shoulder. Izuku's friends shout at Katsuki to put him down, but he turns on his heel and starts to walk to his car. 

Katsuki puts his hand on Izuku's back and heats up his hand, burning Izuku. Katsuki can see the smile on Izuku's face when he's thrown in the car and when Katsuki slams the door shut. Katsuki likes to be at least a little petty, so he turns to look at the extra who is still on the floor in shock. 

"I'm his boyfriend asshole, so if i see you touching him again ill tear your fucking face off." 

With that, Katsuki goes to the driver's seat and hits the gas, spreading off of school grounds, Izuku grins at him, his cheeks flushed. 

"I missed you Kacchan." 

Katsuki glares at him, taking in his appearance. 

"You aren't going to be saying that after i fuck you up asshole." 

Izuku gestures at the new mark on his body, turning so Katsuki can see it through the burnt spot in his uniform. 

"If it means more of this then i don't think i mind." 

They both know there is going to be much more then just marks.