Ode to Joy - Son of Elysium (Seongjoong FF)

We are in the 14th Century.

Hongjoong, a swordsman of the royal family, has the main order to protect the royale's Son named Seonghwa.
Seonghwa, on his own, never wanted to be protected, especially since he was trained from a really young age to be able to protect himself by his uncle.