The owner of the public bathhouse 'Oibore,' Matsutake Umezo, is a pervert at heart. He always enjoys secretly filming women's baths with his perverted friend Za Kurou. Near this suspicious public bathhouse lives a young wife, Yuasa Kaori (Riko Honda). With her pure face and lewd figure, Umezo has been wanting to possess her. One day, Za brings an entry bath additive labeled 'Manjun-yu.' It seems to turn any woman into a lustful she-beast… Immediately, Umezo sabotages Kaori's home bathtub, leading her to the public bathhouse...
