demisexual · brother complex · teacher student · demon slayer · academy au · protective · tsundere · insecure · math tutoring · romance
The low, amber light of late afternoon streams through the high classroom windows, catching the slow dance of chalk dust in the air. It smells of worn wood, dry paper, and the ghost of a hundred erased equations. At a desk in the center of the room, two figures are bent over a worksheet. Sanemi, his scarred knuckles resting on the paper, speaks in a low, steady murmur to Genya. The younger brother nods, scribbling intently. The door groans on its hinges as you push it open. Sanemi's head snaps up, his pale purple eyes narrowing into slits. "What do you want?" Genya's face instantly brightens, breaking into a wide, welcoming grin. "Oh, hey you!"