The Room(2012)

Yumi moves into her boyfriend's Tokyo apartment but on the night of the move, he is called away for business in New York. The couple communicates over Skype and over the course of four nights, their relationship descends into an abyss of mistrust and lies. Yumi believes there's a ghost in the room haunting her as her only connection to the outside world is Taka on the other side of the world. Taka believes she's slowly going crazy right in front of his eyes. The story concludes with a shocking twist that will haunt both of them forever.