妹妹专用欧尼酱2

Ever since that day, "Shizuku" has been spending her days indulging in naughty activities with her "big brother." One day, she invites her classmate and honor student, "Airi," to her room at home. Her big brother, who happens to be in the next room, can't help but grow curious about the girls' conversation. Unable to resist, he peeks into the room, only to... End up being drawn into a threesome at his sister's urging! Together with Airi, Shizuku awakens to new fetishes with her big brother, and Airi, too, discovers the pleasures of being with a girl.