One day, a businessman who works hard and late into the night every day comes home with his boss, Managing Director Kudo. He tells her that he will be going on a business trip to a branch office outside the prefecture starting next week, and for some reason, Managing Director Kudo asks his subordinate's wife, Kaho, to accompany him on the trip. The wife is confused, but when her husband begs her to do so, saying it is for his promotion evaluation, she reluctantly agrees. The following week, at a hot spring resort in the mountains, her boss asks her to entertain him in an obscene manner...