Mei manages a beauty salon while her husband works away from home. Hatanaka, a married beauty-products salesman, has feelings for her, and conversations about their spouses gradually draw them closer. When Mei offers to cut his untidy hair after closing, the two meet alone in the darkened salon. Fueled by alcohol and mutual attraction, they cross the line that night and soon lose themselves in a passionate double affair, sneaking around both after closing and while the salon is open.