The King and His Shadow Guard

[Serious drama, political intrigue, both leads devoted only to each other, protagonist is the bottom]

A mischievous yet kindhearted prince, and a cool, loyal, and courageous leader of the secret guards.

A breathtaking struggle for the realm, and a fierce yet tender vigil through times of turmoil.

Happy ending: the crown prince is the bottom, and the secret guard is the top.