A mixed bathing open-air bath at a certain hot spring inn. I was brought in by my girlfriend's father, and I was with some cute girls who were still innocent, and when I couldn't help but get an erection from their plump bodies, the girls noticed that and got excited! When I gently pressed my dick against her soft ass, she started squirming silently, and I fucked her as hard as I could, stealing from her parents' eyes!