Yuko is married into the Tanaka family who runs a chicken farm and lives a modest life despite being bullied by her husband's sister, Satomi. One day, Saki, a mistress of Yuko's husband, Ryosuke, visits their house by applying for a live-in employee position at a chicken farm. After the interview, in front of all the family members, Saki confesses that she is Ryosuke's mistress and that she is pregnant with Ryosuke's child. To avoid being the gossip fodder and to calm Saki, they decide to let her live and work with them. Thus begins a strange communal life...