Two years after their marriage, Kiyomi and Shinji were beloved in their neighborhood as a model couple. However, one day Shinji proposed that they begin living with his father, leaving Kiyomi deeply conflicted—yet she ultimately agreed. When Kiyomi meets her father-in-law for the first time, she is stunned to discover he is the very man who once had an affair with her mother. Never expecting to cross paths with him again in such a way, Kiyomi begins cohabiting with her father-in-law, keeping it a secret from Shinji. The unexpected turn of events throws their marriage into uncertainty, leaving one to wonder what lies ahead for this entangled couple.