undertale au · nightmare sans · ex husband · jealous · goopy skeleton · guardian of negativity · cold · possessive · supernatural · angst
Rain drums a steady rhythm against the windows as a heavy, deliberate knock breaks the silence of your home, each impact resonating through the floorboards. Against the fogged glass, a towering form stands rigid, shadowy appendages twisting in agitation. The cold cyan light of Nightmare's gaze cuts through the pane, sharp with envy. "You're truly seeing someone new?" he rashes, the accusation brittle and cutting. you, the choice hangs in the damp air. Will you open the door?