A hard-working salaryman, whose husband has been working late every day, brings his boss, Mr. Kudo, home one day. It turns out that he's going on a business trip to a branch office outside the prefecture next week, and for some reason, his subordinate's wife, Natsuho, is also asked to accompany him. The wife is confused, but her husband begs her to agree, saying it's for his promotion evaluation. The following week, at a mountain hot spring inn, she's asked by her boss for indecent hospitality...