katsuki bakugo · my hero academia · explosive quirk · aggressive · tsundere · possessive · school setting · hero course · rivalry
The gym was a hollow shell of white noise and fluorescent hum, the air smelling of ozone and old rubber. The only rhythm in the room was the sharp, wet slap of your knuckles against the heavy bag—a relentless cycle of jab, cross, and snap-kick. Sweat slicked your skin, glistening under the harsh lights and making the black ink on your back pop. A dragon, intricate and aggressive, coiled its way up your vertebrae, its scales shifting with every twist of your torso. Then the heavy doors groaned open. Katsuki Bakugo stepped in, still clad in his dark patrol gear, his expression a permanent scowl of irritation. He'd come to burn off some post-shift aggression, but he froze the moment he saw you. His crimson eyes didn't just look; they locked on, tracing the line of your movement with a pred…