Mirai is in a bad mood when she suddenly has to live with her father-in-law. Despite her husband's attempts to appease her, she decides to accept the situation, thinking, "Maybe it's a good idea to curry favor with him so he can leave me a generous inheritance." After a few weeks of living together, Mirai is comfortable, having seen her father-in-law less than she expected and getting used to the housework. One day, Mirai enters a room that her father-in-law had told her not to enter, and is approached from behind...