Race queen Rin loves cars and racing, finding the circuit to be her paradise. The scent of fuel and the roar of engines are what excite her most. These sensations gradually turn her on, making her crotch slick with arousal. After work, she always indulges in perverted masturbation to satisfy her desires. Today, she mounts a horse-riding exercise machine while keeping a dildo inserted, experiencing thrilling new pleasures.