This is definitely a Masterpiece!
There are a lot of reasons why this is undeniably One of the Best kdrama in history.
The Duality of the roles portrayed by the character leads alone showed how amazing the story is. It takes a lot of talent and acting skills for one to be able to fit and perfectly portray dual roles. I can proudly say that all of the casts did an incredible job. Only those who feel how hard it is to transition from one emotion to another can appreciate those part of the story.

This is just one of so0 many reasons why The King Eternal Monarch is One of a Kind. ♡