The husband works for a first-class company in Tokyo, and the wife runs a handicrafts class as a hobby. Mom's friends 'Rina' and 'Yu' are always jealous when they see the ideal couple in real life except that they are not blessed with children. When they heard that their husband was abstaining for a month for infertility treatment, they plotted to intercept the accumulated sperm. "I get so excited when I take someone else's husband's rich semen."