Mariko works at an entertainment agency. She is more curious than most people and loves sex, so this job is a true calling. Then one day, Shinji, the only son of a wealthy family, asks her to investigate his affair...
| Actor | Role |
|---|---|
 Nao SaejimaMariko | Mariko |
| SShoichi ShiratoShinji | Shinji |
| SShouzou SakairiImai (Detective Agency Director) | Imai (Detective Agency Director) |
| RRyoko MomoiEmi (Shinji's stepmother) | Emi (Shinji's stepmother) |
 Yumi YoshiyukiMidori (Shinji's wife) | Midori (Shinji's wife) |
 Kazu ItsukiMakoto | Makoto |
 Yūichi MinatoTakizawa (Shinji's father) | Takizawa (Shinji's father) |