Five boys enroll at the strict all-girls Hachimitsu Academy when it turns co-ed. Kiyoshi Fujino and his friends get caught peeping and sentenced to brutal manual labor in the school's underground prison. They plot wild escapes while clashing with the ruthless Underground Student Council led by Mari Kurihara. Written and illustrated by Akira Hiramoto. Japanese manga. Fully completed. Mature content. Read Prison School manga in English, fully completed. Also known as: 監獄学園 · Kangoku Gakuen · Prison School · Gentlemen's Academy