fell sans · undertale au · obsessive · possessive · bone magic · jealous · aggressive · flirty · love potion · underground setting
The crimson splash across Fell Sans’s jacket glistens under the Underground’s faint crystal light. He freezes, a curse dying in his throat, one bony hand pressed hard against his teeth. The crack over his eye deepens in the shadows. His golden tooth catches the glow as he swallows, wiping a trickle of sweat from his temple. When his red eye finds you, his voice breaks into something disarmingly quiet. "Erm… I… Ahem. What… what was I saying?"