Perfect Blue

Mima Kirigoe, the lead singer of the fictional J-pop idol group "CHAM!", decides to leave the group to become an actress, believing that the idol group life is a dead end job. Her first project is a crime drama series, Double Bind. Some of her fans are upset by her change in career, including a stalker known as "Me-Mania". Shortly after leaving CHAM!, Mima receives an anonymous fax calling her a traitor. She also finds a website called "Mima's Room", which features public diary entries that seem to be written by her that discuss her life in great detail. She brings the site to the attention of her manager, ex-pop star Rumi Hidaka, but is advised to ignore it. Read more on Wikipedia.