Maruhi sennyû: Gyaku soap tengoku (1992)

Director: Sachi Hamano

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...

Cast

Koyuki Fuji

Kaede Nishihara

Jun Yahagi

Maki Hidejima

Kaori Kuwabara

Hiroko Machino

Kanichi Hiraga

Eijiro Kawai

Masahiro Yoshida

Wataru Saito

Ryou Kurihara

Tetsuji Kajiki