Ryo Narita
Fujiki Keisuke
Masahiro Matsuoka
Yagami Takuro [Taeko's brother]
Nana Mori
Sawai Mikako
Koharu Sakai
Miki Kozue [Researcher]
Robin Furuya
Nozue Takamasa [Detective]
Nanami Sakuraba
Yagami Taeko [Keisuke's lover] | [Narrator]
Yoshi Sakou
Tonami Kengo [Professor]
Soko Wada
Sujikawa Nihei [Detective]
Akito Kiriyama
Hasegawa Teruhiko [Neurosurgeon]
Atsuko Maeda
Karasuma Kyoko [Taeko's friend]
Ken Yasuda
Sasaki Yoshiro [Researcher]