I was excited by the bodies of my daughters, who had grown lewd without my knowledge, in the mixed-bath open-air bath at the hot spring inn where we went on a family trip. I couldn't hold back, so I pretended to wash their backs and gently touched their bodies, and their innocent bodies, which had never known a man, reacted violently! I forgot that I was a father and a daughter, and we had sex in the bathtub.