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...
| Actor | Role |
|---|---|
| KKoyuki FujiKaede Nishihara | Kaede Nishihara |
| JJun YahagiMaki Hidejima | Maki Hidejima |
| KKaori KuwabaraHiroko Machino | Hiroko Machino |
| KKanichi HiragaEijiro Kawai | Eijiro Kawai |
| MMasahiro YoshidaWataru Saito | Wataru Saito |
 Ryou KuriharaTetsuji Kajiki | Tetsuji Kajiki |