Draco Malfoy and the House of Black

After going back in time, Draco has tried to follow the path he remembers. But third year brings a new Ravenclaw cousin, a new Boggart, and a newly admiring Harry Potter, along with castle grounds full of Dementors and what they make him remember. With secrets of his mother's family coming to light, and a godfather he understands far less than he ever thought, Draco will discover that the time in which he can remain passive in the new timeline has finally come to a close.

(NOT MY STORY!)
ALL CREDITS GOES TO starbrigid ON A03!!