Yuko Tanaka (29), who married into the Tanaka family who runs a poultry farm, lives a modest life despite being teased by her husband's sister, Satomi Tanaka (32), who is her mother-in-law. One day, Saki Watanabe (26), the affair partner of Yuko's husband, Ryosuke Tanaka (28), visits the Tanaka family by applying for a live-in employee at a poultry farm. 

Yuko, who was in charge of her interview, decides to hire Saki without knowing that she is her husband's affair partner. However, right after that, in front of Satomi and Ryosuke, Saki confesses that she is Ryosuke's affair partner and that she is pregnant with Ryosuke's child. 

Satomi tries to kick Saki out, but she is threatened by Saki that she will spread the truth about her affair, and she is forced to accept her as his employee in order to preserve the appearance of the Tanaka family. Permit. Thus begins a strange communal life with her husband's affair partner.