Sharp eyes, large piercings. And a gaudy two-tone hairstyle. This is Yuu Tanigawa, a first-year high school student. She's a well-known "bad girl" everyone makes way for... ...Or is she? At heart, Yuu is an incredibly good kid, but her mind is always filled with thoughts of the school's Madonna, Atori Minatori. Wanting to catch the attention of Atori, who serves as the head of the disciplinary committee, Yuu decides to stop being an honor student and aim to become a "bad delinquent"! She acts tough, but she's not bad at all?? This school comedy depicts the struggles of a self-proclaimed delinquent, a slightly clumsy girl. Class is in session (Start)!