Yumiko lives with her son and former boxer Keigo, and is on good terms with her neighbor Ryoko. Ryoko is having an affair with aspiring novelist Mukai, but it seems to be approved by her husband. One day, by chance, Yumiko and Mukai end up having sex...
| Actor | Role |
|---|---|
 Hotaru HazukiYumiko Shimizu | Yumiko Shimizu |
| MMisao UshioFormer boxer husband | Former boxer husband |
| CChocoball MukaiTakagi Seiji | Takagi Seiji |
 Nao SaejimaRyoko | Ryoko |
| YYasuhisa KatoMukai Takashi | Mukai Takashi |
| SSatomi ShinozakiPresident of the gym | President of the gym |
 Mame YamadaDrunk man | Drunk man |
| AAnna TomoAkane | Akane |
| RRentoku MiuraActor | Actor |
| YYuji MotoiDirector | Director |
| KKentaro KatsuraMitsugu | Mitsugu |
| MMister CacaoArmageddon Shinta | Armageddon Shinta |
 Daisuke IijimaReferee | Referee |
| SShumaSon | Son |