| Release Date | 2007-03-23 |
|---|---|
| Runtime | 60 minutes |
| Genres | Comedy |
| Stars | Akika Kitagawa, Anna Tomo, Kyôko Kazama, Mutsuo Yoshioka, Seiji Nakamitsu |
| Directors | Sachi Hamano, Kuninori Yamazaki, Katsuji Oyamada, Katsuji Oyamada, Hollow Dragon |
Irina, the third daughter of the three Nemoto sisters, is a plain, college science student who wears a white coat and glasses at school. It seems that things are going well with her boyfriend Soga. One day, while Irina is studying ancient Japanese history, she discovers a system in which women share a man sexually.
