A submissive slave is bound and gagged, ready for their intense training. The dominant master pushes a thick gag into the slave's mouth, stretching it wide. The slave's ass is lubed up, and the master teases the tight hole with their fingers before thrusting in a large dildo. The slave's eyes water as they struggle to take it, but the master is relentless, fucking the slave's ass hard. The slave's mouth is filled with drool, and their body is covered in sweat as they take the brutal pounding.