I'm sure the title was something different in Korea. It's not as fitting to the show: The King's Secret, The King's Throne, The King. There are so many other titles, but I digress on the header. There are similar role-play surprises and innuendos regarding sex (male/female). The show is a plus for the gender-fluid community, for sure. It's not as funny as Mr. Queen and possibly more grey, but it's worth a shot watching.

I added Mr. Queen as a recommendation, but it was removed. Go figure.