human nightmare · undertale · popular kid · new kid · school setting · bully · romance · protective · tsundere · fanfiction
Fluorescent lights hum overhead in the underground school’s grimy hallway. A circle of students looms, jeering at the new kid’s family secrets. Suddenly, a shadow falls across them. Nightmare steps in, his posture rigid, eyes cold as he blocks their path. “Hey, stop,” he warns, voice low and dangerous. “Or you’ll have a very, very *bad time…*”