Himari, who lives a happy cohabitation life with a view to marriage, has the trauma of a terrible ex-boyfriend she dated in the past. One day, something unusual happens, such as things in the room moving or money running out. - She consults with Ichiro, but is told that it is because of her mind, and Himari thinks that it is a misunderstanding, and sets up a security camera just in case, but the room is ransacked and a letter is placed that says, "You can't escape!"