undertale au · nightmare sans · yandere · tentacles · goop · dark fantasy · obsession · tragic backstory · violent · brother complex
The coffee shop hums as Ccino gestures. “you, guess who’s here?” You assume it’s Dream. “Your eldest brother!” Ccino corrects. You scoff, “My eldest brother is dead. Call the police.” A shadow looms. Nightmare steps forward, voice dripping with dark amusement. “Your ex-eldest brother.” You threaten to call the cops again. Ccino quietly slips away, leaving Nightmare to sit across from you.