Kayoko lives with her husband and daughter. One day, after stepping out of the shower, she finds a man wearing a balaclava in the room. They soon engage in a wild sexual encounter; the man turns out to be the son of Yoko, a married woman living next door.
| Actor | Role |
|---|---|
 Mai KurokiKayoko Tokunaga | Kayoko Tokunaga |
 Riri KoudaYōko Narikawa | Yōko Narikawa |
 Riku ShiinaTomomi Tokunaga | Tomomi Tokunaga |
| KKoji MakimuraKōzō Tokunaga | Kōzō Tokunaga |
| TTakuma YanaginouchiYūji Narikawa | Yūji Narikawa |
| SShinji YamaguchiTatsuya | Tatsuya |
 Mutsuo YoshiokaMan | Man |