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 abstinent for a month at the time when they are likely to get pregnant just before the wifes ovulation day. Was there. - Meanwhile, Mikis older sister Maria, who lives in the same apartment, also had a husband who could not 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 Junichis sperm.