Ayumi, a happy wife with a kind husband and only one son, was feeling bored with her ordinary days.One day, she learned that her son was using a dating site. Ayumi, who is interested and casually posts a post, immediately receives an e-mail from a virgin boy, Mikami. She can't help but feel excited by the exciting content, and they meet and get into a relationship. ``I wonder if it was a good thing that my first partner was me...'' Ayumi was confused but was beginning to feel excited by the thrill, but she received an email from another man...