Welcome to our hot springs! I came by car relying on the navigation system, but the road was not displayed on the map, and when I was visiting, I found a sign saying "There is a secret hot spring" beside me. When you get off the car and go down the mountain road deep in the forest, you will see a wonderful open-air bath in front of you. Immediately, I took off my clothes at the dressing room and stepped into the bathhouse with a towel. The voices of the three girls- "Welcome, customers! To Churu Churu Onsen!" Hazuki, Amane, and Hina introduce themselves. The service of 3 people has started ...