They had been trying to have a child but were unsuccessful, and upon examination, it turned out their daughter was infertile. This sad reality was thrust upon the seemingly perfect couple. After much deliberation, the couple reached a conclusion. One day, the couple looked at their mother Ayako with serious expressions. In her hands was the infertility diagnosis. Taken aback by the sudden news, Ayako heard her daughter say, "Please have my child for me." Unable to bear seeing her beloved daughter's sad face, Ayako could only nod in agreement. A few days later, after checking Ayako's fertile window, they finally reached that day. Under her daughter's watchful gaze, Ayako performed the act with her son-in-law. Both were tense, but successfully, the son-in-law released his seed inside Ayako. Several months later, it was confirmed that the embryo had implanted and was growing steadily inside Ayako. Along with the child's growth, Ayako's feminine instincts began to awaken again…
