Under the watchful eye of his stern mistress, a hapless slave boy is subjected to a unique form of training. With his hands bound behind his back, he's forced to straddle an oversized bottle, his weight resting on his tender ass. The trainer, a dominant woman with a cruel streak, watches with satisfaction as the boy squirms, his face a mask of discomfort and humiliation. The BDSM training session intensifies as the trainer orders him to grind and bounce, his pathetic whimpers of protest only serving to excite her more.