I went on a hot spring trip with my cute sex friend. On the way to the car and to the inn, we immediately started having sex and I thought I couldn't cum anymore... but when I saw her gorgeous body shining beautifully with the hot spring water droplets, I got really excited and got even more erect than before. She looked at me as if to say, "Your dick's gotten bigger...//" so I tried to do it so that the next room wouldn't hear, but it developed into an intense sex session with both of us moaning loudly...