I am a fan of Momo Sakura, a beautiful and famous swimsuit idol. I often use her pictures for masturbation. My girlfriend Risa caught me admiring busty beautiful girls, so she made me take her to the movies. After watching the movie, Risa invited me to her house to hang out, and I could stay the night because her dad was away. Awesome! Staying overnight at your girlfriend's house definitely means getting to have sex with her! But just as I was in heaven, her next words brought me back to reality. "My older sister is at home." It turns out she's not an only child, she has an older sister at home, so how can I "get lucky" now. When I arrived at the house and was about to go inside, Risa told me to wait outside. Hearing her voice echoing down, it seems her older sister at home doesn't dress properly? As I stepped onto the stairs, I saw a sheer pink lace panties thrown on the step! My girlfriend quickly hid it, thinking it must be hers so I didn't think much of it. While waiting for my girlfriend to bake, her sister appeared. And when I looked at her face, I was so surprised that I fell to the ground. Your girlfriend's sister is none other than Momo Sakura! My idol! She's even more beautiful than in the pictures, extremely lovely, with a round chest... Wait, it seems like there's something bulging? She's not wearing a bra! Since she ran out of onions, your girlfriend had to go buy some. Momo then changed into an extremely skimpy bikini. The bra couldn't cover her full, round breasts, the nipple even wanted to pop out. The tiny panties only managed to cover her "mysterious valley", both meaty lips completely exposed in front of me! She wanted me to look closely and evaluate her bikini, constantly posing seductively that I couldn't bear it anymore and rushed to have sex with her! I ejaculated all my sperm into the idol's pussy! And during the time I stayed at my girlfriend's house, I had sex with her sister over and over, each time ejaculating inside her pussy, as if in a dream...