A leather-clad master stands tall, their submissive kneeling before them. The sub's wrists are bound behind their back, their ankles shackled, forcing them to maintain a crawling position. The master's voice echoes through the room, stern and commanding, as they guide their sub through a series of Crawling exercises designed to test their obedience and stamina. The sub's body glistens with sweat, their muscles straining as they move, their breath coming in ragged gasps. The master's crop leaves red welts on the sub's skin, marking their progress, as they continue their intense training session.