In the mixed bathing open-air bath of a hot spring inn that came on a family trip, I was involuntarily excited by the bodies of my daughters who had grown up unknowingly. I couldn't stand it, and when I gently touched the bodies of my daughters by pretending to shed my back, the naive body that didn't know the man reacted violently! I forgot that I was a daughter and a father, and squirmed in the bathtub.