The romance in this drama was a side note, it could have been fleshed out more. Would I recommend Haechi? Absolutely.

Is Haechi based on a true story?

While a fictional story has been written of him as Prince Sado's father and as the brother of Dae Gil who died as a baby, “Haechi” is the first to have young King Yeongjo (known as Prince Yeoning) as the main character.

Why is go ara not in Haechi?

Go Ara injured her ankle while running during filming for “Haechi” on March 7. ... Despite her injury, the actress returned to the set on the March 16, but it was impossible to film her whole body because she was in a wheelchair.