Synopsis

At the prestigious Hachimitsu Academy, a formerly all-girls private boarding school, a historic change occurs as male students are admitted for the first time. However, only five boys enroll among over 1,000 female students: Kiyoshi, Andre, Joe, Shingo, and Gakuto.

While the boys initially dream of an ideal school life surrounded by girls, their fate takes a dramatic turn when they’re caught attempting to peek into the girls’ bath. The Underground Student Council, consisting of three beautiful but strict female students, apprehends them for this transgression. As punishment, the boys are sentenced to one month of confinement in the school’s prison block, nicknamed “Prison.”

The five male students attempt various escape plans, but the Underground Student Council’s leadership – the President, Vice President, and Secretary – employs numerous tactics to force their expulsion from school. The boys face a crucial challenge: can they successfully break out of the prison while resisting the Underground Student Council’s oppressive rule without getting expelled?