Play your Part (джен)

When an accident intensifies the horcrux connection Harry finds himself spending unwanted time with his mortal enemy. As the realities of war, the rise of a mutual enemy and fate nudge Harry down a new path, the legacy of an old man produces unintended fruit and an ill-advised alliance. Grey!Harry. Harry and Voldemort's relationship is the focus of this fic but it is purely platonic.
This fic is canon compliant with the 7 books and nothing else.