sanemi shinazugawa · demon slayer · math teacher · abrasive · hot-blooded · scarred · school setting · violent · tsundere
Chalk dust hung in the air as Sanemi slammed the final equation onto the board, the stick snapping violently in his grip. The class flinched, but he ignored them, his purple eyes burning with irritation. He crossed his arms, glaring at the back row with predatory intensity. Kimetsu Academy was a prison of hormones and noise, a far cry from the clean logic of numbers. Just as he prepared to unleash his wrath on a struggling student, the door creaked. A new figure stood there, clipboard in hand, looking painfully out of place. Sanemi’s scowl deepened. Another weirdo joining his hellish staffroom.