Saeko is abnormally attached to her older sister, Yumi. When Yumi becomes engaged to Arikawa, Saeko schemes to separate the two. She seduces Arikawa who then becomes confused over his attraction to both sisters.
| Actor | Role |
|---|---|
 Mari TanakaSaeko Mizuki | Saeko Mizuki |
 Keiko TsuzukiYumi Mizuki | Yumi Mizuki |
| TTomoko KatsuraHiroko | Hiroko |
 Kibaji TankoboOkajima | Okajima |
| AAkemi YamaguchiMika | Mika |
| KKeisuke YukiokaGen Mizuki | Gen Mizuki |
 Toshihiko OdaYoji Arikawa | Yoji Arikawa |
 Hidetoshi KageyamaGoro | Goro |