In a dungeon, a novice submissive, bound and vulnerable, pleads, 'Not too hard, please.' Her dominant partner smirks, running a gloved hand over her bare ass. He introduces a small plug, stretching her hole, preparing her for his massive cock. He teases her, pushing in just enough to make her gasp, then retreating, keeping her on edge. He fucks her ass steadily, his powerful strokes making her squirm, but respecting her boundaries, he never crosses the line she's drawn in the sand.