The Kingcraft of Arthur Pendragon (слэш)

In his paranoia after Morgana’s betrayal, Uther is convinced the outer kingdoms are falling into magical ways again. Arthur is sent with his knights to the far kingdom of Deira, to check if their alliance with Camelot is still in place. During the trip there, Arthur learns that Merlin is keeping very important things from him.
But Deira has been cursed with something so terrible that only the Once and Future King can lift it. Arthur wishes to help. Things get even more complicated when Merlin saves Arthur and King Yffi from a falling tower that might have killed not just them, but a lot of children. Not his good intentions, nor the fact that he’s Arthur’s manservant, will save him from the pyre.
Or:
The amazing (and long) story of the Once and Future King and his Sorcerer starting to unite Albion (told without skipping a single uncomfortable moment of political craft, truth admissions, awkward love confessions and magical sex.)