I'm An Apex Predator

After the Midnight Duel mishap, Harry has a change of heart concerning a certain blonde Slytherin: hoping it's not too late, our dark-haired hero unwillingly sets himself on a path to a destiny he would never have seen coming and a truth he would never expect. Dark Harry; Severitus; Eventual Drarry Slash; AU of books/movies. Rated T, but may go up later