Meguri is living happily with her beloved husband. Her husband always loves and cares about her, so Meguri has an extremely happy life. But lately, she has always felt that someone is peeping at her, and the photo hanging in the house suddenly disappeared. Especially when the door lock is broken, calling a mechanic to repair it, the components are out again, it takes a week to complete the repair. That made Meguri feel extremely worried and insecure. And what she feared the most happened, on the day of ovulation, because she forgot to close the door, she hurried back. Suddenly, a masked man attacked Meguri from behind. She couldn't resist him, so Meguri could only beg in despair, watching him "invade" her beautiful, plump body, and ejaculate into the inside of her uterus! The man also took a picture of the two of them making love and threatened to post it online if Meguri revealed it. Every day she was worried because that man had ejaculated in her uterus, fortunately Meguri's menstruation was still regular, she felt a little more secure. Since that time, a month has passed but the name has not appeared again. Just as Meguri was trying to forget everything, the masked man appeared again, on the day of her ovulation. He continued to fuck her again, cumming all over the inside of her womb and then leaving again. And so on, once a month, he appeared and conceived her. Meguri always wonders who is this mysterious man who always gives her a feeling of fear mixed with joy? And then when he spoke to her, she immediately recognized his voice, the same person who had repaired the locks for her house before!!