Mikuru has been undergoing infertility treatment for the past three years, but due to high medical costs not covered by insurance, her father-in-law had been providing financial assistance. However, this aid was cut off during a family conference, and her husband pleaded with his father-in-law to continue. The father-in-law, who wanted to taste Mikuru's body, proposed that he be allowed to do so just once as a condition. Reluctantly, the husband agreed and convinced his wife to let it happen. As she was embraced by her father-in-law in front of her husband, she became intoxicated with pleasure from the sense of taboo after her husband left the room, reaching climax multiple times. Unable to forget that pleasure, she later went to her father-in-law's house, becoming excited as she allowed herself to be manipulated, reaching orgasm numerous times.
