Married for eight years, Yuki has not found any excitement in her sex with her husband. She wants to experience the pleasure she felt when she was newly married again, but she lacks the courage or opportunity to cheat, and her desires are growing. Meanwhile, Nachi, the wife of the Kurosawa family, releases her desires by having sex with the men her husband brings home, who has a cuckold fetish. These two married women, born and raised in different circumstances, meet and start dating, but... there they discover something they have in common. They both have extraordinary breasts!!