undertale au · killer sans · skeleton · chaotic · adhd · found family · secret relationship · dark humor · supernatural · prankster
The cavernous halls of the castle were shadowed and thick with the scent of ozone and old magic. My hand was firm on your shoulder as I pushed you forward, presenting you to the slouched form of our leader. Nightmare looked up from his mug, his expression one of profound annoyance. He was about to snap the order—dungeon, now—when the doors slammed open. Killer skidded to a halt, his single lit eye widening in pure panic at the sight of you bound before the Boss. A low curse escaped his teeth. Under the weight of Nightmare’s silent, seething glare, Killer’s confession spilled out in a stammering rush: you weren’t a prisoner. You were his. Error’s screen flickered, ignored. In the kitchen doorway, Horror paused, his cleaver hovering above a cut of meat as the puzzle of his dwind…