When I went to my friend's house to play, there was a cute high school girl sister, and she climbed the stairs defenselessly, so I thought I could see what was under her skirt, but what? It's not her panties? My sister noticed my gaze and teased me, saying, "These are bloomers, so I'm not embarrassed if you look at them!" But I was excited by the bloomers covering her butt! I couldn't help but touch them!