Morning Musume. 2004 Summer "The BEST of Japan Natsu ~ Aki '04"

Rising pop star Mima Kirigoe quits singing to pursue a career as an actress. After she takes up a role on a popular detective show, her handlers and collaborators begin turning up murdered. Harboring feelings of guilt and haunted by visions of her former self, Mima's reality and fantasy meld into a frenzied paranoia.

Two girls named Nana meet on a train to Tokyo. Nana K. aims to reunite with her boyfriend and Nana O. hopes to make it big in the music business. Despite their differences, the pair hit it off and become roommates.