Prison School

Hachimitsu Academy, one of the strictest girls academies in Tokyo, has decided to admit boys into their system. Kiyoshi Fujino is one of these new boys, but he discovers to his shock that he and his four friends—Takehito "Gakuto" Morokuzu, Shingo Wakamoto, Jouji "Joe" Nezu, and Reiji "Andre" Andou—are the only male students among 1,000 girls. Even worse are the draconian laws that are still in place, which punishes even the most minor infractions with a stay in the school's prison. A series of perverted accidents causes the five boys to be "arrested" and receive an ultimatum: either stay a month in the prison or be expelled.