Yuta returns to his wife's parents' house for the first time in a while. I was always fascinated by the unchanging beauty of his mother-in-law Yuka over the years. That night, Yuta's wife left home for her class reunion, and Yuta is nervous about eating alone, so Yuka offers her sake. On the contrary, she gets drunk and can't control her sexual desire and pushes Yuta down and has a relationship. The next day, she regrets her drunkenness and tries to forget it, but she can't forget the pleasure she remembered once.
