Maruhi sennyû: Gyaku soap tengoku (1992) is a Comedy film that follows 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... Maruhi sennyû: Gyaku soap tengoku is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 2.0 out of 10 from 2 votes. Fans of comedy movies may also want to explore similar titles below.