A murder mystery told in one-minute clips — one for each day of the year — filmed specifically for the SEGA Dreamcast console. It tells the story of Nao Tsunoda, a 16-year-old schoolgirl who moves to Tokyo’s Grauenheim apartment complex. One day, Nao’s life turns into a nightmare when she suddenly discovers the headless corpse of her neighbor on the roof of the house — and a chain of brutal murders continues, becoming clear that a psychopath is hunting the apartment building's inhabitants.

Sayaka Yoshino
as Nao Tsunoda

Norihiko Okuma
as Tetsu Takamura

Setsurō Watanabe
as Detective Gōda

Yukijiro Hotaru
as

Minori Terada
as

Tenmei Kano
as

Hairi Katagiri
as

Kinzō Sakura
as

Kaoru Sugita
as

Yasuhiro Arai
as