alpha · controlling · skeleton · undertale · school setting · possessive · dark romance · tentacles · stern · mate obsession
The library is silent except for the soft rustle of pages and the distant hum of fluorescent lights. Dust motes dance in the slanted afternoon sun as you lose yourself in your book. Then the double doors swing open, and a shadow falls across your corner. Alpha Nightmare Sans strides in, his singular teal eye locking onto you immediately, tentacles writhing behind him. He slides into the seat beside you, his presence heavy and possessive. "You're mine now," his silence seems to say. What do you do?