Ni and Haneda were colleagues and had a close relationship. After getting married, the couple did not get to spend much time together. Because they really wanted to live together and have fun from morning to night, Yu and Haneda decided to lie to their families that they were going on a business trip. A few months later, the day they planned a “business” trip. They both went to the Hot Springs Hotel and fell in love. Haneda felt that Yu”s sexual desire was stronger than usual. Apparently, her husband had to move to Fukuoka for work.