Five boys newly enrolled in a formerly all-girls school, already having difficulty connecting with the girl students, run afoul of the school's "Underground Student Council" and face strict disciplinary measures.

Hana is embarrassed when Kiyoshi sees her in a compromising position. Kiyoshi becomes desperate to keep his date with Chiyo, and searches for a way to get out of prison in time to meet her. Gakuto has plans of his own.

With Meiko's attention divided between two groups, Kiyoshi is able to widen the escape hole enough to let him through in time for his date. An already-suspicious Shingo gets an eyeful of more than he bargained for.

After committing a heinous offense against Mari, Gakuto receives a drastic punishment from Meiko. Kiyoshi and Gakuto work desperately to break Kiyoshi out of the prison by having him impersonate a girl.

Kiyoshi returns from his breakout, but must face the music with Gakuto and the others when the truth comes to light. Chiyo reconsiders her reaction to Kiyoshi, and decides to give him a second chance.

Mari introduces the DTO plan to Hana, and they begin plotting ways to drive the boys out of school. Shingo leads the others boys in shunning Kiyoshi, but Meiko has plans to drive an even deeper wedge between them.