She had a one-month affair with a transfer student from the same school when she didn't even know the word "sex," and today they met again after 10 years. (Kuramoto Sumire, DVAJ-593)

When I was still a student, I lost my virginity to Sumire, who transferred to my school. We secretly had sex at home and at school, but she transferred away and I lost all contact with her after that... Ten years later, at a class reunion, she suddenly appeared in front of me...