The Riddle Twins

Voldemort finds out he has a powerful twin brother who grew up in a rich wizard family.Dumbledore makes Voldemort the new defence against dark arts teacher during Harry's sixth year at Hogwarts while Voldemort's good brother will protect the students. Both Voldemort and his brother look like young Tom Riddle. Will Voldemort's new enemy make him hate Harry less? HP/LV