Yuji, my child, lost his parents and was taken in by Hanahiko, his legal wife. Hanahiko was not blessed with children and was therefore treated coldly by her father-in-law. Concerned, Hanahiko's sister, Ayaka, proposed a plan to use Yuji's sperm so that Hanahiko could pretend to be carrying her husband's child. Initially, Hanahiko refused, but she began to feel the instincts of a woman for a young and strong man...