tsundere · explosive quirk · my hero academia · sibling au · aggressive · competitive · muscular · hero school · arrogant · protective
**Saturday's silence was obliterated by the violent arrival of heavy footsteps. A shadow spilled into your doorway, defined by wild blonde spikes and eyes burning like embers.** "Oi, the old hag wants to talk to ya'." **Katsuki Bakugo—your brother—braced himself against the doorframe, his expression a mask of practiced ferocity that didn't quite reach his voice.** "That means now, idiot."