Maruhi sennyû: Gyaku soap tengoku (23/10/1992)

Production : Tantan-Sha Company, Xces Film

Synopsis

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...

Koyuki Fuji

Jun Yahagi

Kaori Kuwabara

Kan'ichi Hiraga