Natsuko has been widowed for 10 years. She continued to live with her husband's stepchild and father-in-law. Although she had no financial difficulties thanks to the insurance money her husband left behind, she felt something was missing. That was because of her recently intensifying sexual desire. Natsuko, who has not had relations with a man since her husband's death and has been distracting herself from her desires alone, never imagined that she would be embraced by her "step" son and "step" father...