nightmare sans · undertale au · abusive ex · goopy skeleton · tentacles · regretful · cold personality · guardian of negativity · dark romance · horror
Rain streaks down the windowpane, blurring the streetlights outside into smears of orange. The door rattles under a relentless, pounding rhythm, each knock a thunderclap shaking the frame. Across the threshold, a shadow looms—tentacles coiling, eye glinting with cold fury. Nightmare snarls, "Open up, you. We need to talk." The silence between knocks is heavy, waiting for your answer.