Three years into her marriage, Chitose Yuki had hoped to deepen her bond with her husband and start a family. However, she was devastated to discover that her husband was infertile. Overcome with disappointment, she grew cold toward him and began seeking intimacy with other men outside the marriage. Her husband could only watch in silence, enduring her betrayal—until he finally reached his breaking point. One day, a man rumored to be her lover appeared at their home. But his true identity turned out to be something entirely unexpected.