is a 1997 Japanese animated psychological thriller film directed by Satoshi Kon. It is loosely based on the novel by Yoshikazu Takeuchi, with a screenplay by Sadayuki Murai. Featuring the voices of Junko Iwao, Rica Matsumoto, Shiho Niiyama, Masaaki Okura, Shinpachi Tsuji and Emiko Furukawa, the plot follows a member of a Japanese idol group who retires from music to pursue an acting career. As she becomes a victim of stalking by her obsessive fan, gruesome murders take place, and she begins losing her grip on reality. The film deals with the blurring of the line between fantasy and reality, a commonly found theme in Kon's other works, such as Millennium Actress (2001) and Paprika (2006).

Plot

Mima Kirigoe decides to leave the J-pop idol group CHAM! to become a full-time actress. Many of her fans are dismayed by her change from a clean-cut image, particularly an obsessive fan, Me-Mania, who begins stalking her. Following directions from a fan letter, Mima discovers a website called "Mima's Room" comprising public diary entries written from her perspective, recording her daily life and private thoughts in great detail. She confides in her manager, former pop idol Rumi Hidaka, about the site, but Rumi advises her to ignore it.