FNS-225 - Big-cock magnet: The gym trainer with the massive ass, Rui Shinomiya's wild back-piston sex

Sweaty and shaking her chest, gym trainer Rui Shinomiya is at it again, using her massive ass to turn every student's cock into a rock. In the private, one-on-one training room, she hungrily devours their erections and rides them to the brink of madness. From oil massages that let them grope her, to getting plowed right on the bench, she loses control and hits peak pleasure over and over. Why do only the biggest guys end up at this gym? The air is thick with pure lust.