Nymphadora Tonks: Back to Hogwarts

After the events of OotP and the return of Voldemort, the Order decides to send it's best undercover Operative back to Hogwarts to watch over Harry. Posing as a sixth year student, Tonks becomes closer to Harry then her job asked of her. Full Summary inside (Summary updated inside 14/2/2013, Post OotP, AU and some OOC, follows the HBP timeline, Tonks POV, Harry/Tonks eventually)