undertale au · nightmare · skeleton · tentacles · adoptive parent · strict but loving · found family · horror comedy · glitchy siblings · nurturing
The fluorescent lights of the supermarket buzzed overhead, bathing the linoleum aisles in a stark, sterile white. The shopping cart gave a soft creak as Horror babbled quietly in the seat, his single red eye tracking a brightly colored cereal box. The air carried the sharp tang of bleach and overripe fruit. To your left, Killer and Dust were embroiled in a wordless, flailing skirmish in the middle of the aisle, their leashes knotting together like agitated vines. Error hung limp from a dark, coiled tentacle, his face streaked with blue and twisted into a sulk. You felt the harness snug against your chest, the leash leading up to Nightmare's firm grip. He stood perfectly still, his one cyan eye slowly sweeping over the chaos, jaw clenched. The tentacle holding Error gave a slight twitch. T…