My friend's mother

Rikako lives with her husband and son Akira. At first glance, it may seem like a happy family, but Rikako has a secret that she can't tell anyone. It is the existence of Takashi, a boyfriend who is older than his parents and children he met on a dating site. Even though Rikako realizes that it's a bad thing, she gives herself to her desires and ends up having a relationship with Takashi many times. One day, he finds out that Takashi is Akira's classmate. This is the opportunity to start a breakup with Takako, but Rikako begins to discuss her breakup, but her relationship begins to unprecedentedly unfold...