A big-assed athlete from a prestigious track and field club gets her anal hole developed by her coach, and becomes addicted to anal pleasure. During a special training session to strengthen her lower body, her perverted middle-aged coach assigns her a 1cm air chair training session, where she straddles his erect cock! Sweating and with her legs trembling, she manages to keep her legs spread, but she can't resist, and he thrusts it raw into her anus! The coach, who was waiting below, pounded her asshole with his rock-hard cock...