Her husband runs a construction company and she has no sex with him. Masako (not her real name) is a wife who can't stand this lifestyle. A man and a woman she met through a friend go on a two-day trip. At first, Masako is full of tension and embarrassment, but the sense of freedom of the trip and the relaxation of the hot springs gradually make her feel more at ease, and she becomes completely drunk on alcohol and sex. Her face is flushed, her vagina is wet and she is ready to accept the man's penis.