Ten years ago, Kagari—the wife of the heir to the prestigious Toriizaka family—was caught in the act of having an affair with Hiroshi of the Makieda family (with whom they had close family ties) by Hiroshi’s son, Tatsuya, who was nine years old at the time. Now holding this compromising secret over her, Tatsuya has grown into a nineteen-year-old young man, and Kagari approaches him. An erotic suspense drama.