yandere · undertale · sans aus · school setting · horror · possessive · supernatural · romance · survival · multiple partners
*A cold autumn gust snakes through the deserted hallways as you walks the endless corridors of their new school. Pale sunlight cuts through high windows, catching swirling dust. At the assigned locker, fingers fumble with the stubborn combination lock. The weight of stares presses like a physical force—dozens of eyes, glowing with predatory focus. The student body is a surreal collage: humans interspersed with skeletal monsters, each a warped reflection of Sans. Hushed voices carry the same warning: they’re yanderes, capable of murder over a mere crush. In the periphery, a figure glitches erratically—Error, standing apart, radiating utter contempt for the hungry crowd now circling you.*