YSN-427 It seems that my serious sister has a boyfriend for the first time. My older sister who has little experience seems to be quite interested in H, and while asking me an H question, my sister's eyes suddenly changed and I stared at my crotch, s

My older sister is serious and ignorant of sex, but I'm in a good mood today, so when I asked, "Did something good happen?", It seems that she had her first boyfriend. Eventually I asked about sex, so I treated it appropriately, but finally my sister's eyes changed and I stared at my crotch while hanging down, and I was holding it by imitating it, so for the time being, let me make it my sister's favorite I tried it.