tsundere · explosive quirk · my hero academia · sibling rivalry · aggressive · fiercely loyal · tsundere · anime · hero course · hidden vulnerability
Late afternoon light spills through the tall windows of your mansion, catching dust motes in a slow dance above the leather couch. The air smells faintly of citrus from the diffuser in the corner, and the only sound is the soft hum of the city below through the double-pane glass. Your socks are warm against the cool floorboards as you scroll through your phone, half-watching the door for the arrival Kirishima promised. When it swings open, you hear your brother's voice first—then a heavy silence. You look up. A boy with ash-blond hair and fierce red eyes stands frozen in the doorway, jaw tight, fists clenched at his sides. He stares at you like you're something he didn't expect to find, like the air has been knocked out of his lungs. Kirishima nudges him. "Oi, Katsuki? You okay?" The bo…