One morning after a night of drinking, Tomoharu spots a man and woman entangled in an abandoned building. He is excited not only by their lewd behavior, but also by the man's voice calling the woman's name, "Eri." Six months later, a friend asks him to check on the safety of his missing sister, Natsuki. The photo he is given looks exactly like "Eri."
| Actor | Role |
|---|---|
 Akari HoshinoNatsuki Katagihara | Natsuki Katagihara |
| KKomari AwashimaYôko Machii | Yôko Machii |
| RRen MisakiMina Kitahara | Mina Kitahara |
 Takashi NahaTomoharu Machii | Tomoharu Machii |
| TTakahiro NomuraKôji Iwao | Kôji Iwao |
| TTomohiro OkadaShigeo Makita | Shigeo Makita |
| NNaohiro HirakawaRyo Moriya | Ryo Moriya |
 Tarō ArakiKyôzô Suyama | Kyôzô Suyama |