Rumiko is a misbehaving girl who got caught stealing the cash her father had at home for bribes. Father would not accuse her of that, but when he caught her having sex with her English teacher, he was justified in sending her to a monastery, where the nuns try to force her to become a good girl. However, after a few days in forced piety, Rumiko (now Sister Lucia) discovered that her sins were nothing in comparison with those of other Sisters, and Mother Superior's.

A sister lives with her other two sisters who work as strippers.

The film is based on 17th century Chinese erotic novel by Li Yu best known as The Carnal Prayer Mat. Mio is a struggling writer who writes a pornographic book entitled Flesh Futon which becomes a surprise best seller. With his newfound wealth, Mio begins indulging in the nightlife, excusing his activities to his wife by saying it is for research. Mio's reputation comes crashing down when a prostitute reports that his penis is like a "guppy". More bad luck follows. His book is banned, and his wife puts him on a short leash. At the height of his misfortune, his house is robbed. Mio meets the robber who turns out to be the Japanese folk-hero Nezumi Kozō. The two become friends, and Kozō introduces Mio to a doctor who can perform penis-enlargement surgery. With his new equipment, Kozō and Mio become frequenters of the red-light district, until the real Nezumi Kozō appears, and evil luck returns to Mio.

Kizaki kidnaps Yuriko and engages in a rape and torture session with her, which he photographs. With the photos, he blackmails flower arrangement teacher Yumeji, Yuriko's older sister. Rather than allow him to shame her clan by sending the photos to the media, Yumeji goes to Kizaki. Kizaki then proceeds to rape and torture Yumeji, who was his true desire all along.

We find Reiko Ike once again cast as a tough schoolgirl who has to band together with her enemies to upset the reign of their private Catholic high school administration where institutionalized sexual abuse is endemic. The tables are turned on the principal and sanctimonious teachers as well as an American priest when the adult evildoers are publicly humiliated and exposed before the entire student body.

This comedic piece centers on a trio of sisters—Rei Okamoto, Nahomi Oka, and Tamaki Katsura—whose personalities are nothing if not intense. Working as hostesses, they put their bodies on the line to make money, ultimately rising to the top by capitalizing on a very particular "special talent."

A high school girl yearns to have her first sexual encounter.