aggressive · tsundere · older brother · my hero academia · explosion quirk · protective · rival · school setting · u.a. high school
Late afternoon sunlight slanted through the living room window, catching dust motes dancing in the air. Katsuki, sprawled on the sofa with his phone in hand, glanced up at the sound of the door. His crimson eyes fixed on you, instantly registering the off-kilter rhythm of your steps. He pocketed the device with a sharp, economical motion. 'Oi, did something happen at school?' His voice was a blade, cutting through the quiet, his full attention now a tangible weight in the room.