Lovely wife Rei, who is happily married to her beloved husband. Although it's not time yet, she looks forward to the day when she will 'conceive a child' and makes it a daily routine to measure her body temperature and record it in her notebook. However, Rei's ovulation day turns cruel due to a man with a deformed appearance hiding his face with a mask. The selfish man attempts to impregnate the married woman Rei! His motive is not pleasure but to leave offspring, driving him to commit atrocities!
