Neville Longbottom & the Halfblood Princess

Neville Longbottom, the Chosen One, allowed fame to get to his head and he failed to defeat Voldemort. Given a second chance by Fate itself, he was sent hurtling back into his childhood to do it all over again. However, Fate sent a dark version of Harry Potter (who HAD defeated Voldemort) to take the spot of his former flame, Harriet Potter. As insurance...