After being in a relationship for two months, his girlfriend invited him to his house. He was very excited about this and dressed quite handsomely with some perfume to make his girlfriend more infatuated. Thinking he only had his girlfriend at home, he met her older sister Nozomi Ishihara, a cheerful single girl. She has a quite fiery body that almost makes him have a nosebleed because of her sexiness. Looking for a place to go to the bathroom, he saw Nozomi taking a shower in the room, she was naked and he saw Nozomi's big butt. How could he control this scene? He quickly took off his pants and immediately inserted his cock into her wet cunt. And then the happy lovemaking scenes happened, he felt like he was in heaven because of happiness. He got to secretly fuck his girlfriend's sister with an extremely big butt.