Hachimitsu Private Academy's five male students have been released from their oppressive prison captors, allowing them to return to their ideal school lives surrounded by short-skirted girls. With their freedom restored, things could not be going better for the gang. Kiyoshi Fujino and Shingo Wakamoto have formed close bonds with their female classmates; Reiji Andou is the center of attention due to his masochistic quirks; and even Takehito "Gakuto" Morokuzu—notorious for defecating himself during class—befriends the klutzy yet like-minded Mitsuko Yokoyama. However, in contrast to his fellow ex-convicts, Jouji "Joe" Nezu struggles to readjust to student life, and the unlikely romantic success of his friend Gakuto pushes him to his wit's end. Feeling ostracized, he begins to wonder if life was better behind bars. On the outskirts of Tokyo stands Hachimitsu Private Academy, a storied all-girls boarding school for elite young women full of potential and good breeding. But as the new school year rolls around, one tradition is going out the window: For the first time in the school's long history, boys are being allowed to enroll. But on the first day of school, only five boys make the cut. Kiyoshi Fujino, one of the lucky few, is thrilled by this discovery, his heart leaping with joy at the thought of being surrounded by all those girls, day in and day out. But little does he know of the shocking fate that awaits him.