The Shiina couple were on good terms when they first got married, but after a few years, they completely cooled down. My wife, Yuna, had a boring daily life without a couple's life for more than a year. At that time, my husband invited me to a hot spring trip for the first time in a while. Yuna, who wanted to liven up her rutted life, readily agreed. And on the day of the trip, Yuna heads to the inn with faint expectations, but she does not realize that what her husband was thinking is more bold and obscene than she imagined.