Taking advantage of the long weekend holiday, my wife and I went on a trip to a hot spring. We've been married for two years and have no children. Come to think of it, we've never gone on a trip together since we got married... My wife Eri seemed very happy about it. When we arrived at the inn and were relaxing in the guest room, we heard some kind of noisy, vulgar laughter coming from the hallway... I frowned, wondering what was going on, when suddenly, a group of vulgar hot spring visitors came into the wrong room.