Miho is no longer feeling any excitement from sex with her boyfriend Shigeki. At a secondhand bookstore, she finds a book called "The Secrets of Female Body Development" that claims to turn any woman into a master of her vagina. She immediately tries to put into practice what is written in the book, but...
| Actor | Role |
|---|---|
| MMaki KikuchiMiho Sato | Miho Sato |
 Anri InoueKimura Sanae | Kimura Sanae |
| KKyoko KajiwaraKyoko Nomura | Kyoko Nomura |
 Yutaka IkejimaBookstore owner | Bookstore owner |
| SSetsuhiko KobayashiKato | Kato |
 Tarō ArakiFunabashi Kiyotaka | Funabashi Kiyotaka |
 Kenzô YamaguchiShigeki Kuwahara | Shigeki Kuwahara |