Ao Oni ? is a 2014 Japanese horror film based on the game of the same name. It was released on July 5, 2014 in Japan.
As the scene goes back to the terrified Anna in the room, it suddenly switches to the time where Anna spends her time with Shun playing the escape game Shun made by the riverbank. Anna notices the scar in Shuns hand and asks about it, which Shun avoids to answer. Anna then heads home as Shun stays a little longer to finish checking his game. Takuro then appears and bullies Shun. Anna is seen looking back as she walks home.Takuro and Shun walks to an empty house. Upon reaching the house, Mika and Takeshi already wait for them. Meanwhile, Hiroshi is collecting soil sample nearby goes to check the house and meet the group. The door suddenly swings open. Takuro enters the house with his stuff and the rest follows. Anna is seen following them and enters the house as well. As they all enter, the door is locked and cannot be reopened. A smashing noise is heard upstairs and Hiroshi goes up to check by himself. They all, except Shun, receive unknown calls simultaneously, but no one is speaking. It is shown that the signals are gone. ........
Source: Wikipedia