Because her husband, Asuda Keiichi (Hasegawa Hiroki), had an affair with an office lady from the same company and filed for divorce, full-time housewife Fuko (Yuko Ohnoko) abandoned her four children and committed suicide by jumping into the river. The sudden death of the hostess left the eldest daughter Yui (Kutsuna Shiori), the eldest son Sho (Nakagawa Daishi), the second son Kaito (Ayabe Morito), and the youngest daughter Nozomi (Honda Nozomi) at a loss, and also made the family a mess. In order to take care of the children's daily life, Keiichi invited a housekeeper, Mita Touma (Matsushima Naoko), through an introduction agency. This is a woman who is like a robot without a smile. She can remember the names of all the members of AKB48, can cook many specialties, and there is almost nothing she doesn't know. She is completely loyal to her master's orders, even obeying such things as killing people. Mita's arrival has brought about a huge change to the Asuda family, which is on the verge of ruin... The final episode of this film set a 30-year record of viewership (40.0%).