The five male students of Hachimitsu Private Academy have been freed from their harsh prison captors, enabling them to resume their ideal school lives amidst girls in short skirts. Now that their freedom is restored, things could hardly be better for the group. Kiyoshi Fujino and Shingo Wakamoto have developed close ties with their female classmates; Reiji Andou draws attention because of his masochistic quirks; and even Takehito "Gakuto" Morokuzu—infamous for defecating himself in class—becomes friends with the clumsy but like-minded Mitsuko Yokoyama. In contrast to his fellow ex-convicts, however, Jouji "Joe" Nezu finds it difficult to readjust to student life, and his friend Gakuto's unexpected romantic success drives him to the brink. Feeling alienated, he starts to question whether life was preferable behind bars.