Let your wife go on a trip with the company and the ending

Ni and Haneda are colleagues and the two have a close relationship with each other. Once married, the couple cannot spend much time together. Because they really wanted to live together and have fun with each other 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'. 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.