My wife and mother-in-law, who are big fans of the hot spring idol "Soukai Onsen", learned that they would come to a nearby hot spring next month, and decided to go on a hot spring trip with their family of four. However, her father-in-law asked her to use the atmosphere of the hot springs to work hard to make children, and she was ordered to live abstinently for a month before traveling. And on the day of the trip, my wife who is crazy about idols and hot springs does not deal with me at all. I ended up spending a frustrating night, and when I was wandering around the inn, I happened to witness her mother-in-law taking a bath ...