Maki lives with her son Takashi. Takashi almost never answers when Maki talks to him, and Maki lives a lonely life. One morning, when I woke up, Maki and the others were sleeping in an unfamiliar room. The door is locked and cannot be opened at all. The two were trapped and at a loss, but Takashi noticed a poster on the wall. There is something written there that surprises the two of them...
