I am looking for a fic posted here before 2010. It's a mix between time travel and multiverse.
Hermione and Draco time travel and start creating time anomalies. When they come back to their time, time tries to rectify their mistake, creating a different parallel universe. For example, at some point I think they come back to a reality where Grindelwald won and they have to go back in time and keep rectifying the anomalies. At the end, Hermione ends up travelling to different alternate realities. in all of them, the Hermione and Draco of that universe are together ( are both Griffindors or Hermione is a Ravenclaw and Draco is a Slytherin, ...)
Thanks