Delinquent Housekeeper (2012)

Miki, a former delinquent, now works steadily as a housekeeper. She’s assigned to the Sakuma family, but quickly grows uneasy: the eldest son is a shut-in, the daughter struggles with mental instability, and the mother suffers from memory loss. As Miki learns that a series of housekeepers have mysteriously quit, she begins to uncover a hidden secret lurking within the Sakuma household...