Marebito (film)

Marebito ? Unique One is a 2004 Japanese horror film directed by Takashi Shimizu.

The girl, whom Masuoka dubs F, appears to be something other than human, and Masuoka becomes obsessed with understanding her. He sets up cameras that enable him to observe her from his cell phone when he leaves the apartment, and checks on her regularly. On a trip to the shopping mall he sees her speaking to someone off camera, and a menacing man in black appears behind him. When he returns to the apartment a woman in a yellow jacket is hiding in the stairway outside his door. Inside, he finds F convulsing, and attempts to feed her, but she will not eat. He discovers that twelve seconds of camera footage is missing, and receives a mysterious phone call from a pay phone warning him that he is in serious trouble.After being beaten with his camera by a stranger whom he filmed, Masuoka cuts his finger on the broken lens and returns home. He discovers that F survives on blood when she licks his finger, and cuts himself to feed her further. He begins to care for her by providing animal carcasses. He decides to stop trying to treat F like a human, and to regard her as his pet. ........

Source: Wikipedia