Brother and sister duo, college student Yoshiki and his older sister Misato, a JD, take on a game challenge themed around whether siblings can feel sexual arousal toward each other—with a cash prize on the line if they don't get turned on. Both insist they have zero sexual awareness of one another, but as the game progresses, their attention slowly shifts. Initially teasing and mocking each other, their tension gradually builds. The scene unfolds their dynamic: an older sister who constantly carries a vibrator and masturbates, and a younger brother who's hesitant at first but becomes increasingly intrigued. The first challenge is kissing. Though hesitant, the brother participates while the sister approaches with moderate boldness—resulting in the brother already being fully erect. The next challenge: breast fondling and kissing. As the sister's breasts are groped, she plays with her brother's cock, while he gets turned on sniffing her boots. The sister, struggling to suppress her pleasure, uses her vibrator, and during this process, she rubs his erect cock with her feet. After the game ends, they're given a condition: 100,000 yen if they can endure either unprotected sex or one minute of grinding without climaxing. They begin grinding in missionary position, but as the hesitant sister protests, "Don't put it in!", the brother aggressively grinds his cock against her. As the sister starts to feel pleasure and the brother becomes engrossed in grinding, the moment she orgasms, the brother loses control and thrusts his bare cock inside. Overwhelmed with excitement and unable to resist the sensation, the premature brother cums inside her with a creampie. Unstoppable, the brother and now-activated sister immediately start round two on their own, switching to cowgirl position. They forget the game entirely, wildly thrusting their hips as the sister cums repeatedly. When the brother requests doggy style, the sister pounds into him until he cums, resulting in a second creampie. Even after being creampie fucked twice, the sister demands, "Let's look into each other's eyes this time!" and asks for a third round. The siblings' excitement spirals out of control—both climaxing together in perfect sync for a third creampie. The energetic brother happily jerks off his still-hard cock and shoots a fourth creampie as a final climax.
Comments
