Yuya has been unattractive towards women since he was dumped by his girlfriend in his school days. Then, his mother's friend Maiko, who works as a marriage counselor, comes to visit the house... Yuya's heart beats with excitement at the reunion with the man he once loved. That night, Maiko feels guilty about having sex with him while drunk, but she becomes immersed in their secret rendezvous... The two continue to enjoy their secret affairs in secret. However, Maiko worries about the future of Yuya, who is as old as her son...