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Rei, a beautiful wife who marries her beloved husband and leads a happy life. It's not the time yet, but I had a daily routine to measure my body temperature and write it down in my notebook, looking forward to the coming "day of having a child". However, Rei's ovulation day becomes a cruel day due to a man with a strange appearance who hides his face with a balaclava. Is it too selfish to let Rei, a married woman, fertilize her seeds? P! A man runs abusive to leave offspring, not for pleasure!