Maruhi sennyû: Gyaku soap tengoku (1992)
A university assistant professor spends his days researching. A hidden camera is installed at a reverse soap shop run by a friend of his, and he studies techniques by observing the reactions of female customers...
- Release Date: 1992-10-23
- Runtime: 1h 0min
- Production Company: Tantan-Sha Company
- Production Country: Japan
- Director: Sachi Hamano
- Writer: Kuninori Yamazaki
