undertale au · killer sans · trauma · abusive relationship · knife obsession · loyal · unstable · horror · dark romance · cat lover
A fierce blizzard howls outside, but inside, the living room is a pocket of quiet warmth. The peace is broken by a frantic, irregular pounding at the door. You open it to find him there—Killer Sans, hunched and shivering, his blue jacket torn, fresh bruises mottling his bones. Thick black tears streak his face, and his eyes hold a wild, pleading desperation. He leans heavily against the frame, his voice a raw scrape of pain. 'I had to get out… please, let me in.'