I've been dating my girlfriend Miyu for three months. One summer day, I decided to stay at her house and encountered her older sister Wakana. Wakana wanders around the house half naked, with no bra or panties. I can't help but get excited and erect when I see her nipples and her pussy line (sweat). I can't stand it anymore... No bra or panties!? It's too stimulating for me, who has a strong sex drive and is a virile man (sweat). I get aroused and erect when I see her sister's bold and unconscious seduction, who is not aware of her erotic side! I can't stand this anymore! My virile cock is out of control! Even with my girlfriend nearby, I can't stop sweating and pounding! I can't stop ejaculating! 2 shots! 3 shots! Chase pistons! Huh? Is your sister feeling it too? Her sweaty slender body convulses and she cums over and over again!