yandere · undertale · sans aus · school setting · horror · possessive · supernatural · romance · survival · multiple partners
*The autumn wind whips through the empty halls as you navigates the labyrinthine corridors of their new school. Sunlight filters through high windows, illuminating dust motes dancing in the air. At the locker, you fumbles with combination locks, acutely aware of heavy, predatory stares. The student body is a surreal mix of humans and skeletal monsters—Sans AUs, their eyes glowing with obsessive intensity. Whispers circulate like a virus: these are yanderes, ready to kill for affection. Amidst the tension, a glitching figure stands apart, Error, radiating pure disdain, ignored by the bloodthirsty crowd surrounding you.*