The older sister, a pervert, engages in high-speed riding position, rubbing against the uterus while intimately stimulating it. (SSNI-477)

The overwhelmingly beautiful S1, "Yoshitaka Nene," treats men like toys in the slut riding position! Her rapid hip thrusts and high-speed waist twists stimulate the glans deep inside, causing even men to ejaculate uncontrollably!