The Shiina couple had a good relationship when they first got married, but after a few years, they completely cooled down. My wife, Yuna, had been living a boring daily life without a married life for more than a year. At that time, my husband invited me to go on a hot spring trip for the first time in a long time. Yuna, who wanted to improve her life, readily agreed. And on the day of the trip, Yuna went to the inn with faint expectations, but she did not realize that what her husband was thinking was more daring and obscene than she had imagined.