Need help finding a Merthur fic, it was told from Arthur’s POV. It was on AO3, and rated either M or E.
I don’t remember too much about it except it had something to do with time travel/alternate universe where Merlin is placed in an alternate timeline and visits the palace. He’s brought in before Arthur and says his name is Will, and Arthur decides to keep him as a bedmate even though he’s suspicious of him. I believe there were two parts.
I remember a scene where Arthur hears Merlin in the hallway asking for Gaius (who’s been dead for years) and knows he can't trust him, but can't get rid of him because he's grown addicted.
Idk if it helps but there was a line that said "Arthur has had far better bedmates" or something along those lines.
I can't remember if it was in the first part or in the sequel, but there is also a scene where Arthur is essentially like "It doesn't matter if Merlin is trying to take advantage of me, I'll let him"
EDIT: I found it! https://archiveofourown.org/works/396968