At Seonghwa High School, appearances mean everything. Everyone knows their place—except for Lee Ha-neul (이하늘), the outcast tomboy who refuses to fit in. With her messy ponytail, sneakers instead of loafers, and a scowl that warns “don’t mess with me,” she’s notorious for ignoring school rules, skipping classes, and challenging anyone who tries to control her. She doesn’t care about popularity, boys, or grades—but she’s fiercely loyal to the few people she calls friends.