Hogwarts Will Never Be The Same

Transfer students at Hogwarts in Harry's second year, and new neighbors on privet drive. What does this mean for Harry, and what does it mean for the plans of Dumbledore and Voldemort? (First fanfic, not really sure where this fic will go but it should be fun!) Rating at an M, it may not seem as such at the beginning but it will head that way in the long run.