So not sure if it's a bl where the MC ends up with anyone. I only read a handful of chapters and can't even remember where I read them T-T but I do remember some important-ish parts. First and foremost is that the story is a transmigration/isekai where the MC enters a new world (cultivation one specifically) from a book he read and didn't like. (It was a reverse harem and he didn't like the main female lead) so he wrote a fanfic in which all of his favorite mxm pairings ended up together. Then he enters their world and his goal is to actively set them up. I remember at the beginning he was a lackey of some dude (may have been forced into it, I don't remember) but he ended up saving the original female protagonist to save himself cause he would have died if he allowed it to continue the way it was set up to do. Also, I remember it mentions the fanfic thing in the summary and in the first chapter if that helps. Any help finding this story would be appreciated!!! Any questions to help narrow it down I'll try to answer but like I said I didn't get that far and can't remember much more.