At the class reunion, my first love, Ayaka, had become a married woman. She kept teasing me, who had no luck with women, and showing me her panties. I went to the bathroom after getting drunk, so I went to check on her out of concern, and she was waiting for me. She seemed to be sexually frustrated, too, and her sexual desire was ignited when she saw my erect penis. I inserted it from behind in the bathroom, and her face in the mirror was so erotic. A classmate saw us, so we changed locations and continued having sex in an empty hallway, and I thoroughly enjoyed the body of my first love, whom I hadn't seen in a long time.