After losing his memories in an accident, Eun Jo transfers to a new school, convinced he's a model student—quiet, kind, and hardworking. But when he sees his classmate Bom being bullied, something in him snaps. His instincts take over—and so do his fists. As Eun rises against the school's cruel hierarchy, he starts to wonder: Who was he before? And why does Bom feel so familiar? Packed with school drama, mystery, and unexpected fists, this is the story of a "good student" who may not be so good after all.