Shiro Nakagawa is an associate professor specializing in the study of eroticism. His happy, ordinary life is shattered by the vengeful actions of Nana Mochizuki, who appears in his class as a student.
| Actor | Role |
|---|---|
 Rinako HirasawaNana Mochizuki | Nana Mochizuki |
 Minami AoyamaEmi Nakagawa | Emi Nakagawa |
 Azusa SakaiYōko Nakagawa | Yōko Nakagawa |
| KKeisuke IbaTanehiko Yoda | Tanehiko Yoda |
| SSeshioKeizō Akao | Keizō Akao |
 Takashi NahaShirō Nakagawa | Shirō Nakagawa |