Kaoru is a 17-year-old virgin who has an SM fetish. He secretly dreams about an SM relationship with his childhood friend Nana. One day Kaoru's mom asks Nana to hide all his SM toys so he'll study for a change. However, Nana finds the leather one-piece that Kaoru bought and tries it on, but she accidentally locks it and doesn't have the key! The beginning of super strange relationship.

Sequel depicting the innocent love of boy and girl high school students who are into S&M, based on the popular manga. Directed by school drama maestro Shimizu Atsushi, who also handled the first installation. Nana (Aono Miku), a model student who serves as student council vice-president, and run-of-the-mill virginal high schooler Kaoru (Tochihara Rakuto) are childhood friends. They embark on regular S&M play dates in secret as a stress release for Nana. For spring break, Nana goes on a school trip to a power spot in Nagano planned by the student council. Kaoru joins her, and a change occurs in their feelings.

A woman is found dead and three other women, incarcerated at a psychiatric hospital. The body belonged to the wife of the hospital President, Dr. Kiriyama who has gone missing since the day of the murder. As Detective Hayashida and his partner start to investigate the case and interview the women linked to the victim, they soon find themselves tangled in a web of the women’s lies and deceptions.