Airi Nakashima and Mayumi Kadokura team up to completely dominate an M-man in a series of intense scenes. This time, they unleash a custom-made ball torture style, starting with relentless testicle play that continues nonstop until the very end! How much endurance can this M-man really handle? Find out in this must-see installment of the M-Male Cultivation Plan from C-Format.