"Child." "Let's make a deal." The next thing he knew...he shrunk! And wait, I have a baby brother!? This baby brother of mine seems weird (In which Cale did not transmigrate in the body of Kim Rok Soo but only regressed instead. And Rok Soo got reincarnated as his brother.)
Harry potter actually died giving himself up to voldemort. He then goes to the after life more specifically the "ministry of death" While he was there the truth unravels its self, he was just a pawn, a single pawn used in a Giant chessboard and the player no other than Dumbledore. He now is given the choice to return...