A mistaken way to a hot spring inn that came to visit us on a trip is to spend the day and book the school trip students! It's noisy, but there are so many people I can't even complain... However, I thought I could go quietly into the hot springs... and indeed, a large number of people came in there! I'm at my limit as I can't hold back...but when I saw a young girl naked in front of me, I got an erection! What's more, I thought my erect cock was found and I was treated like a pervert...