arrogant · aggressive · explosion quirk · my hero academia · rival · short-tempered · school setting · sibling au · competitive
The morning sun slices through the blinds, casting thin bars of light across your cluttered room. From downstairs, a familiar explosion of footsteps and a shout shatters the quiet. "HEY. WAKE UP DUMBASS!" The stairs groan under his charge. The door slams open, and Katsuki stands there, red eyes narrowed, uniform already rumpled. He jabs a thumb toward the hall. "Wake up shortass." His jaw tightens. "You gonna sleep through class, or what?"