The King and I (2007)

Both were historical
Both female leads were Queen that was beautiful, kind, but….
Touching heart.
Young king, lack of confidence, palace politic, jealousy king

Both were historical
Both involve story inside the palace
Both has a beautiful female lead
Both has sad ending

Both were historical drama.
Both female leads were beautiful.
The main lead were deeply in love
However, ending were sad

Both were historical, telling the dark story of palace.
Beautiful queen facing the evil competition
Lots of plotting. Politic, conspiracy,
Kind of sad

Same male lead in this two historical Korean drama
Both drama he played the role of layman, and eventually started to have feeling with the princess