It's a similar happy marriage -turns - mistress marriage trope. But the FL is strong, has a supportive brother (2pm chansung) and nice kids

Main character is King Yeonho, son of the same King Sukjong ( played by Yoo Ah in ), & then proceeds as how his sons become the next kings & the rest of the story.

Features the same King Sukjong ( played by Yoo Ah in ), the next king son of Jang Ok jung and King Yeongjo , his other son