Ok, I used to read this fic long time ago, when it was still being updated, I don’t know whether it's completed now or not. It was a story where Draco decided that he wanted to become friends with Harry and went back into the past to change it. If I remember correctly, when he got back, nobody knew that anything changed. There was only one other slytherin guy from his year who still remembered what happened (it was Blaise, I think). Anyway, in this altered reality Harry is a Slytherin and a mean one to boot. And to make it more irritating for draco, they're not even friends, it's more like I-hate-you-but-I-still-fuck-you kind of relationship.
I would be really grateful if anyone could help me find this fic. OR if you can think of any other multi-chapter hp/dm fic that I may have not read (so stuff from live journals or something that is more difficult to find than with a search engine on ff.net or aff.net).
Cheers