[Reducing Mosaic]FNS-161 Little devil sister who keeps trying to get close to her big brother, tempting him with panty shots

At my sister's birthday party, I ended up staring at her panties by accident... Thinking I was being looked down on, I tried to keep my distance from her at home. But for some reason, my sister Yuui clung to me and spread her legs in front of me without any inhibitions, showing off her panties. That firm ass and healthy thighs that make you feel growth. I shouldn't be getting aroused, but my heart is racing. Whether she knows it or not, Yui keeps bringing her crotch closer to my eyes...