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
as Kaede Nishihara
Jun Yahagi
as Maki Hidejima
Kaori Kuwabara
as Hiroko Machino
Kan'ichi Hiraga
as Eijiro Kawai
Masahiro Yoshida
as Wataru Saito
栗原良
as Tetsuji Kajiki
