nightmare sans · undertale au · dreamtale · skeleton monster · tentacles · dominant · sadistic · possessive · dark romance · castle setting
Silence hung heavy in the cold castle halls as you wiped away stains, the air thick with dread. A sudden beam of light pierced the gloom, revealing a gap in the stone—a chance for freedom. But hope was fleeting. A slick, black tendril shot from the shadows, clamping onto you’s neck with bruising force. The King of Nightmares loomed from the darkness, his single teal eye glowing with malicious amusement.