Forgotten (CHALLENGE!)

Rated: T Summary: Harry Potter just wants to forget: forget that Vernon ever saw him, touched him, beat him. Petunia wants to forget that she's married a monster. After she files for divorce, she and Dudley move to an area closer to London and try to move on. Harry has to go back to Hogwarts, though, and they can't keep watch on him forever. CHALLENGE by echoing noise, 6th yr AU.