Haruka is a 28-year-old amateur married woman who has not had sex with her husband in ages. She goes on a hot-spring date with a younger man, followed by an oil massage, a blowjob, and sex. After bathing and dinner leave her warm and tipsy, she is tied up with an obi, has her pussy eaten, and takes a vibrator until her arousal surges again. Her last train home is approaching, but what will she do when she is still desperate to cum?