Because they liked living together, from morning to night, Yu and Haneda decided to lie to their family and say they were on a business trip. A few months later, the two planned a "business" trip. The two went to a hotel with hot springs and fell madly in love. Haneda felt that Yu's sexual desire was greater than usual. Her husband had to go on a business trip to Fukuoka, and she also had to go with her husband, so the two had to separate for a while. Knowing this, Haneda feels sad and depressed and uses young sex to regain her composure. However, Yu sometimes lied and said he was on a business trip to see Haneda.