This will be fun (слэш)

Harry wasn’t prepared for the rush of emotions that surged through him when he stared down at the chained and trembling form of Tom Riddle. The thrill of seeing his enemy brought so low, the fury as images of Sirius, Remus, and his parents flashed through his mind, and possessiveness took hold. His magic surged up, tightly winding its way around everybody in the room.
Tom Marvolo Riddle was kneeling on the hard, cold stone in Harry’s kitchen. Four Aurors stood over him, holding the chains. Two wrapped around Tom’s throat, overlapping with what appeared to be a metal collar.
Or...
Harry Potter may or may not be plotting to take over the world and has decided as a kind of pet project to turn Voldemort into the perfect little slave.