Maki lives with her son Takashi. Takashi almost never answers even when Maki talks to him, and Maki lives a lonely life. One morning, when Maki and her friends woke up, they were sleeping in a room they didn't recognize. The door is locked and I can't seem to open it at all. The two of them are trapped and at a loss, but Takashi notices a paper posted on the wall. There was something written there that shocked both of them...