Shingo, on furlough from the prison, meets a girl named Anzu at the arcade in town. When Gakuto turns to his Guan Yu figurine for guidance, the tip of his sword falls off, starting a chain of events with momentous consequences.
Andre suffers a mental collapse when he goes for a week without receiving any discipline. Shingo takes Anzu to the movies, but finds his expectations betrayed. The Underground Student Council moves forward with their DTO project.
Shingo realizes that he saw emails regarding DTO on the computer in the corrections office, which if recovered by the boys, would prove that they were set up. The boys plot to break into the corrections office.
The boys are resigned to their upcoming expulsions, and spirits are low, until Gakuto, suffering a bout of temporary insanity, devises one last strategy to get them out of their predicament, if they can just buy enough time to pull it off.
Given a one-day reprieve, the boys must again execute a plan to get inside the corrections office, but the Underground Student Council won’t make it easy for them. Hana has a personal score that she wishes to settle with Kiyoshi.
Hana continues pressing Kiyoshi in order to exact her revenge, but Kiyoshi employs an adaptation of a classical military strategy to counter her. Once all the boys are locked into their cells for the night, will they be able to complete their plan?