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...
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Original Name(秘)潜入 逆ソープ天国 (Maruhi sennyû: Gyaku soap tengoku)
StatusReleased: 32 years agoOctober 23, 1992
Language日本語
Spoken Languages日本語
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