The story will take place in a setting were slavery is legal, either historical or fantasy. Our hero is a man who recieves a slave girl as a gift. She is young, beautiful, vigorous, and obedient (but not too obedient), ideal as a sex slave. The problem is that our hero is morally opposed to the slavery in his society. He can't free her or give her back without offending the giver who is a wealthy/powerful man. So he reluctantly keeps her as his slave. He gives her housework to do and struggles with the temptation to use her sexually. That temptation is very strong. Though wont admit it to himself, having a slave girl at his command is the most arousing thing that has ever happened to him. Deep down he's a dom. Meanwhile the slave girl is wondering why he wont use her, and why he keeps averting his gaze from her. She worries that there is something wrong with her. So she starts trying to entice him into using her, first sublty, and as time goes on, not so subtly. Eventually something she does provokes him to whip her. After the whipping he takes her, as a master using his slave.