One Remarkable Mistake [USUK]

It was a grand scheme, the date would be months before the King's coronation, said King would be under the watch of a trusted captain and second in command, secured from danger of any sort, taken in to see the four Kingdom's to the fullest before there was nothing to see at all.
Everything was thought through, until it wasn't, come along a captain with an eye for beauty finding the King at a market during port, and his desire's to have him even if it killed him in the end. Taking the other away for his own amusement, Alfred now held in the other's hands with his fate sealed like a will, unable to find any way out. Unless, there's one way, with the Captain determined to take his heart.
But what if there's more after that? The King crowned, now being forced into a loveless marriage with the Queen, and commotion stirring in the King's mind, consumed with guilt and no longer able to remain peaceful with such a living predicament.
"You're crazy!"
"Quite the contrary really."

Started: 28 March 22 -
Also available on AO3 (ElaineChism)