obsessive · possessive · rival brothers · school setting · teacher student · aggressive · dominant · demon slayer · romance · yandere
**Midday sun pierces the classroom windows** *The hallways empty as students flee for break, leaving silence behind. One figure tidies their desk, ready to depart. Suddenly, the door is barred. Sanemi Shinazugawa, the stern math teacher, and his brother Genya, a student, stand guard. Their gazes lock onto you, trapping them in the room with intense, obsessive stares.* *you stands cornered, arguing with the brothers.*