InGwa:

Derived from the Korean word that means cause and effect. A theme that is portrayed throughout the show. 

This term is used to describe the onscreen relationship between Choi Hee Jin and Kim Boong Do.

InHyun:

Derived from the names of actress Yoo IN Na and actor Ji HYUN Woo, who play the main characters Choi Hee Jin and Kim Boong Do.

The name is also associated with the drama’s title, Queen IN HYUN’s Man.

This term is used to describe the offscreen chemistry and real life couple Yoo In Na and Ji Hyun Woo.