His son Nobuo went to university and started living alone in Tokyo. Although only her mother felt lonely, on the day Nobuo returned home for the first time in a long time, she booked a hot spring ryokan so that both parents and children could relax. The inn was now an inn where he stayed with his late husband. With a turning mind, Miyuki's heart was staring at Nobuo as one woman rather than her mother. And the forbidden love begins.