Documentary on one of the most famous branches of Japanese filmmaking, the erotic Pink film genre, known as Pinku Eiga, and the closely related Roman Porno cult films series produced by notorious Nikkatsu studios from 1971 to 1988.

Documentary filmmaker Kenjiro Fujii takes a look at the history of a distinctly Japanese brand of softcore pornography in this extensive examination of the "pinku eiga" genre (ピンク映画 Pinku eiga or Pinkeiga). For more than 40 years, so-called "pink" films have served as both a key source of revenue for the Japanese film industry as well as a launching pad for the careers of such mainstream filmmakers as Kiyoshi Kurosawa. After providing a detailed history of the still-profitable and popular genre through interviews with a variety of behind-the-scenes players and clips from such classic pink films as Fish Bait Boobies, director Fujii shifts his focus to the production of an upcoming pink film to offer a glimpse into the creative and stylistic evolution of the genre.

A married couple who enjoy an exciting sex life together. Their favorite part is molestation play on the commuter train. This morning, the husband molested the wife, and the wife was satisfied, and in return, the wife became a slut and made her husband ascend to heaven. Although the couple's relationship is harmonious, the husband and wife are looking for a stronger thrill, and they are also enjoying their sex life with their lovers. The wife's lover is the boss of the company where she is dispatched. However, this boss has a perverted habit and his demands escalate. Then one day, he realizes that she likes to be molested on the train, and takes her into a crowded train. The wife accepts the fingers of someone other than her husband for the first time on the train...

A man named Bunjin is a herbivorous man who can grope women but cannot have sex. He has no success in his relationship with his girlfriend Natsuko, and he continues to hone his techniques on the train. Meanwhile, Natsuko's desire grows stronger...

Ayuko Tsujikura is a female college student who is seriously searching for "true love". Not only is she having an affair with Ezaki, an assistant professor at the university, but she is also dating three men at the same time: medical student Kazuhiko Odagiri and unsuccessful actor Shunichi Nakagawa. However, to Ayuko, she is in a serious relationship with each of them. Ayuko's best friend from university, Megumi, accuses Ayuko of being a villain, but Ayuko doesn't get it.

A man who was once divorced due to a lack of sex remarried, but now has a much older wife. To avoid another sexless marriage after his previous mistake, the couple try out various cosplays and creative situations, enjoying their married life to avoid any sense of staleness. However, the couple's sexual exploration begins to get out of control, and before long it develops into a big commotion that involves everyone around them...

An interview with critic Yoshiyuki Hayashida about Hisayasu Satô's films (bonus feature on the "The Films of Hisayasu Satô: Volume #3" Bluray set released by Vinegar Syndrome).