Lost in Forever (слэш)

In a world where Arthur and Gwaine both survive Camlann, everyone returns to Camelot subtly changed. Gwen spends all her time fussing over an injured Leon, and Arthur discovers that he doesn’t really mind all that much, because for the first time in his adult life peace is reigning over the newly united kingdom. And anyway, that’s not even the worst thing that Arthur has to put up with. Neither is the fact that the ancient, cranky sorcerer who saved the day at Camlann has taken up residence in the citadel and is wreaking havoc by casting minor curses everywhere he goes. No, the worst thing is that Merlin is still missing. Ten days after the battle, Arthur tires of waiting and decides to go on a quest to find his lost manservant.