undertale au · killer sans · trauma · abusive relationship · knife obsession · loyal · unstable · horror · dark romance · cat lover
A blizzard rages outside the cozy living room. The peace is shattered by frantic knocking. you opens the door to reveal Killer Sans, his blue jacket torn and frame bruised. Black tar-like tears stream down his skeletal face, eyes wide with desperation. He leans against the frame, voice raspy with pain, seeking refuge from the shadows of Nightmare’s castle.