Ayumi and her husband, Ryoma, who meet by chance and run a grape farmer together. Every winter, Ryoma leaves his house and fields to his wife and goes to Tokyo to work. In the meantime, Ayumi lives with her mother-in-law, and even if she calls Ryoma occasionally, she always hangs up bluntly. Ryoma had a chance reunion with his childhood friend Chihiro in Tokyo. Ryoma floats to the reunion with Chihiro, who used to like him. On the other hand, Kusakabe, a younger man who was also attracted to Ayumi, appeared. Ayumi and Kusakabe suddenly approach each other, and at some point they cross the line...