Koo Gum (2013)

the same story I koo gum is the thai version of bridal mask the same of some working in the army of the enemy of his country but he actually working for his country and he fall in love with someone who really hates and want to kill him for his betrayal for his country

Different setting and countries, but in both
-the two leads come from enemy countries, with the male lead’s country submitting the female lead’s
-for this reason, the female lead hates the male lead at first
-she also has a lover at the start of the series
-despite her hatred, the male lead is crazy in love with her
-but she eventually gets won over by his devotion

Koo Kum is much more tragic however. Prepare yourself for a River of tears here !