Yui, a woman married for 15 years. She had previously suspected her husband of cheating. One day, she confirms her husband's infidelity. When confronted, the husband admits to cheating. After that, the husband becomes harsher towards her. The daughter clings to Yui, who can't sleep. The family gradually falls apart... She wants him to know the pain of being cheated on, so she meets a lover through a matchmaking app and has sex in front of her husband at home.
