I have a childhood friend who has been with me since we were little. We've been together for so long that there's no shame between boys and girls! On a hot summer day, my childhood friend brought her female friend and took off her uniform as usual, saying, "Let Ryo a bit," and then he forcefully pulled off her female friend's uniform, saying, "I'm used to seeing this guy." As expected, I have no tolerance for girls in underwear other than my childhood friend, so I got a full erection! I thought they would be put off, but... the two girls' erotic switches were fully open, and before I knew it, we were doing a threesome while sweating!