Something Dark This Way Comes

Harry Potter: time-traveller extraordinaire. Casting himself back in time Harry's determined to make this life count; to make the magical world a better, more accepting place. It doesn't hurt to have some fun while he's at it, as well as change himself for the better. Dark!NotEvil!Harry, Harry/OC/Hr/Nym romance, slave relationship later with undisclosed!Vamp.