Junichi and his wife, Miki, who are in their third year of marriage, are actively engaged in "pregnancy" and lived a life in which their husbands abstinence for a month at the time when it is easy to get pregnant just before the wife's ovulation day. Was there. Meanwhile, Miki's older sister Maria, who lives in the same apartment, also had her husband unable to have children due to ED, but she wanted a child before her sister, and when the scheduled date for making children for her sister and her husband approaches, the degree of exposure He came to seduce him in expensive clothes and took away Junichi's sperm.