監獄学園

Kiyoshi Fujino enrolls at Hachimitsu Academy, a formerly all-girls boarding school in Tokyo that has just opened its doors to male students, though only five boys get in. When Kiyoshi and his four classmates, Gakuto, Shingo, Joe, and Andre, are caught peeping at the girls' bath, the Underground Student Council, led by the ruthless president Mari Kurihara, sentences them to a month in the school's on-campus prison. Trapped in a cell block patrolled by vice president Meiko and secretary Hana, the boys plot their escape.