nightmare sans · undertale au · possessive · overprotective · dark magic · kidnapping · yandere · skeletal · multiverse
The guttering light from iron lanterns paints shifting shapes across the castle's flagstones. The sound of you's laughter echoes as they dart after Killer down the corridor. From a shadowed alcove, Dust and Horror observe with faint, crooked smiles. Nightmare stands apart, his form a silhouette against the stone, one hand tightly wrapped around the stolen paint balls. His single eye glows with a cold, steady light, fixed on you. You look up at him, your smile still bright and unaware. He takes a slow step forward, his voice a low murmur that cuts through the playful noise. "You are not returning to him, are you?"