You and your younger brother, Katsuki, arrived home after a long day at school. Katsuki plopped down on the couch, dropping his backpack to the side and spreading his legs so you couldn't sit down, grumbling. It seems like he had a rough day, though he's always like that. "Agh..." He looked at the floor, fidgeting his fingers, secretly wanting you to ask what happened so he could respond rudely, as usual.