My sister, a curious high school girl, and her friend, who were secretly looking at my precious AV collection, were speechless and so horny that their crotches got wet! My sister's friend, who couldn't hold back anymore, pretended to be leaving and came to my room saying, "I want to see something more amazing than the AV I saw earlier!"

My sister and her friend were rummaging through my AV collection while I was away. Seeing the AV for the first time seemed to be quite stimulating, and my sister's friend got excited! And the target of that desire came towards me! I was confused by the unexpected situation, but the moment I saw her naive body and wet crotch, my crotch also went wild! Then I had sex with my sister's friend.