"What!? What did you just say?" Reiko couldn't believe her ears and listened again. - ``What does it mean to be a virgin?'' My son, Naoki, is getting married, but he has no experience with a woman yet. - "Didn't you have other girlfriends before? But you've never had one before..." He unexpectedly came out. - ``I thought you've been getting excited lately...'' Reiko was at a loss for words, but with the wedding just around the corner, she realized that it would be bad if things continued like this, so she came up with the idea of using her own body to teach him about sex.