Yumi came to the hot spring with her son on this day. Her recently divorced Yumi was worried about, so her son took her to the hot spring. When Yumi tried to enter the bath, she mistakenly entered the men's changing room and caught a glimpse of her son changing. There, Yumi realized that she was seeing her son as a man. Though she thought she should control herself, she couldn't hold back, and eventually had a relationship with her son…
