This story is based on DZ2's Forget-Me-Not Challenge, so here's the rules.
Plot: During one of his many death-defying adventures, Harry suffers an accident and, when he awakens he either:
A: Loses his memory completely with NO CHANCE of getting it back
B: Can't remember who he is, but does eventually remember
If challenge A, Harry CANNOT recall anything after July 31st of his first year at Hogwarts or, failing that, can't remember who he is!
If challenge B, Harry must regain his memory through flashbacks and snippets of memory
Must be set any year before - but not including - 5th Year
Grey or Dark Harry
Pairings must be H/Hr, HP/LL, HP/DG or HP/DM
Harry must sever ties with Ron and see him for what he is: a greedy, waste of space.
Even if she does not become his paired person, Hermione MUST remain Harry's friend
Harry must not trust Dumbledore
Harry siding with Tom
Harry becoming a Slytherin
Bindings on Harry's magic
Harry knowing about the Horcrux/prophecy
Severus reconciling with Sirius and Remus
Other Weasleys choosing to stick with Harry
Harry undergoing a full personality change
Harry sticking with Dumbledore
Hermione going against Harry
The Golden Trio remaining together
Neville or Luna bashing
OTHER THAN THAT, IT IS COMPLETELY UP TO YOU!