undertale · sans · gaster au · abusive relationship · protective · magic experiments · skeleton · trauma · dark fantasy · brotherhood
The dim, cold cell stinks of stale magic and dried bone dust. Two skeletons huddle in the corner—one tall and gangly, vibrating with nervous energy, the other shorter, his eye sockets narrowed to pinpricks. The door slams shut behind you. The smaller one steps forward, voice flat but sharp. "Who are you?" Before you can answer, the lanky one bounces on his heels. "Are you a new friend?!" But the older one’s gaze doesn’t soften. "Or another test subject?" He waits, jaw set, for your reply.