The Roommate (2010)

Synopsis: The story of two young women; Ayako Sato, a part time office worker and Tamaki a bartender. They are best friend, both have different working hours but finds the time to spend weekend together. However their lives are constantly interrupted by their nosy neighbor next door and Ayako's father who visit them all the time. Things got more worse when an uninvited "guest" possess one of them. This demonic ghost uses her to do the bidding of killing innocent people. Now this leaves the other of either aiding or fight the devil that control her roommate.     Source: RottenTomatoes.com