During third year, Harry makes a rash decision and quits Divination, following in Hermione's footsteps. It turns out to be the best thing that happens to him, as he us quite gifted in the subject.

Harry thought he had it all figured out. He had won the war. He had defeated the Dark Lord, fulfilled the prophecy, just like he was supposed to. But they hadn't counted on Harry surviving. It interfered with their plans and with the age of inheritance drawing near he would soon become a threat to all their scheming. He worked so hard to become what they wanted only for a repeat of his parents fate, as he whom was trusted so greatly turned his back on the golden boy. A killing curse cast just as his back was turned courtesy of the man he'd trusted. The man he'd thought was dead. The man looked down at the boy with a sickening smile. "This is the end I'm afraid, Harry, my boy." But they should have learned by now that when it came to Harry, Death had a soft spot. After all, the killing curse usually left behind a body, didn't it?

Harry Potter is the Master of Death, and thus, immortal. Every couple thousand years, he'll let himself reincarnate into a new dimension. This dimension is quite similar to his first one, except he has a twin brother, and the Voldemort in this world is willing to give up everything he's worked for, as long as Harry teaches him magic. And Harry? Harry just likes annoying Voldemort with memes, vines, and Potter Puppet Pals.