A new female erogenous zone, the "Pilmus Muscle," has been discovered! 【※What is the Pilmus Muscle?… A muscle in the deepest part of the buttocks that is closely connected to nerves. Through special stimulation, it becomes the ultimate erogenous zone for women, surpassing even nipples and clitoris.】 Wakana Nao, with her top-tier body, takes on the first-ever AV challenge to develop the Pilmus Muscle. Initially skeptical, but as she receives a specialist's unique massage, moisture begins to form between her legs! As pleasure reaches its limit, she convulses, experiences urinary incontinence orgasm, and climaxes repeatedly through Pilmus Sex! The mystery of the female buttocks revealed for the first time!
