Boogiepop and Others (J-Movie) (2000)

When waiting for his girlfriend, Touka Miyashita, to arrive, Keiji Takeda sees a ragged looking man stumbling through the town. A short man in a black cloak speaks with the other man after he collapses, then berated the crowd for not helping. When the police arrive, the two escape, but what shocked Takeda most of all was that the cloaked man has the face of his girlfriend. The following day, Miyashita acts as if nothing had happened the previous day. Takeda sought to speak with her after school, but instead spots the cloaked man. Confronting him, the stranger introduces himself as Boogiepop. Boogiepop claims to be a split personality, who has emerged to protect the world.

Boogiepop explains to Takeda that Miyashita is unaware of his existence, and would modify her memories to explain the blank periods. Boogiepop has appeared this time to face a man-eater hiding in the school. Through their discussions, the two come to accept each other, and become friends. In the end, Boogiepop appears to Takeda in Miyashita’s school uniform, and explains that the crisis was over, so he would disappear. To the end, Takeda is sure that Boogiepop is merely Miyashita’s repressed possibilities, rather than a monster-fighting hero.