Yui, a married woman who wants to have a child in her third year of marriage. Every day, I measured the basal body temperature and recorded it in my notebook, and I was looking forward to the child-making SEX on the day of ovulation. However, a tragedy attacks Yui who is at the height of happiness. A mysterious masked man suddenly appeared, pushed down Yui with a fearless smile, and began to forcibly screw in the erected meat stick. He was aiming for an ovulation day to pour his offspring into her womb. The nightmare dangerous day vaginal cum shot that is repeated until fertilization has begun!