Her little sister, who has a serious demeanor, changes completely when she's away! She comes close to me and whispers in my ear, "Can I fall in love with you, boyfriend?" The little devil tempts me by secretly touching my dick, "I'm starting to want to put it in. I don't mind if it's raw." I can't escape with her face so close! To be honest, I can't stand the temptation of my little sister, who is cuter than my girlfriend, and I end up cumming inside her many times... I'm worried that she'll find out.