RoomMate (2013)

Plot

After an accident, Harumi Hagiwara finds herself in the hospital, where she connects with her nurse, Reiko Nishimura. Once discharged, they choose to live together, but things take a dark turn as Harumi begins to experience unsettling occurrences alongside Reiko's increasingly odd behavior. Her unease deepens when Reiko starts calling herself 'Mari,' suggesting a complete transformation in her identity. As the chilling events unfold, Harumi realizes she may be in danger, and the situation escalates into a shocking murder investigation.