Real Jinro Game (2013)

Nine people are locked in a secret room. The nine people are complete strangers. From a speaker, "Werewolf killed and ate the village people" comes out. Blood splatters from a man's neck. The eight remaining people panic. A man in a mask then appears and announces that the Jinro (Werewolf) game is starting. The people locked in the room finally realize they do have something in common. All of them were involved in some way with idol star Ena Eto's death. Her body was found a few days ago.