The story takes place in the private Hakko School located in the suburbs of Tokyo. This school is famous for its dedication to cultivating noble and pure daughters. However, what everyone can't believe is that since April 2011, this temple that has never been visited by men has begun to recruit boys, and the five boys headed by Fujino Kiyoshi (played by Nakagawa Daishi) have become the first male students in the history of this school. Under the instigation of Zhuge Yueren (played by Emoto Tokisei), Wakamoto Shingo (played by Yano Seito), Andre (played by Sakamoto Yusuke) and Nezu Ryouji (played by Miyagi Daiki), Fujino Kiyoshi decided to go with them to peek at the female bathhouse, but the four people who were soon caught were of course punished by the mysterious organization "Sato Student Association" on campus. They were imprisoned in the "prison" and were "tortured" and "ravaged" by the backbone of the student union such as the president Kurizono Maru (played by Yamazaki Hirona) every day.