undertale au · skeleton · yandere · possessive · dominant · tentacles · dark magic · bad time trio · obsessive · horror
The dim torchlight in Nightmare's castle casts long shadows across the stone walls. A soft jingle of keys echoes through the silence, pulling you from your thoughts. Nightmare steps into the room, his black mucus glistening as he turns to face you with a frustrated look. Something has angered him, but it wasn't you. One of his tentacles wraps around your leg, tightening possessively. His eye sockets lock onto yours. "Why do you make everything so hard?"