An unexpected and sudden loss of virginity! On a family hot spring trip where I was the only boy, I desperately tried to hide my pseudo-phimosis penis in a mixed-gender open-air bath, but seeing my mother and sister naked, I became completely erect! The result was a development of sex education within the family. IENE-444

On a family hot spring trip where I was the only male, my mother and sisters didn't treat me like a boy at all, changing clothes as usual... When we arrived at the open-air hot spring, it turned out to be mixed bathing! But at home, it's always women, so I'm used to it. And while they were saying, "Still a virgin? It's so late," they reached for my penis...