Junichi, in his third year of marriage with his wife Miki, was actively engaged in 'trying for a baby.' He would abstain from sex for a month to align with the period just before his wife's ovulation when conception is most likely. Meanwhile, Miki's sister Maria, who also lived in the same apartment complex, couldn't have children due to her husband's ED but wanted a child more desperately than her younger sister. As the planned conception date for Junichi and Miki approached, Maria would come to seduce Junichi, dressed provocatively, and take all of his sperm.
