A love that shouldn't exist

It was the Middle Ages, the time when there was war between all countries and peoples. Hyunjin was the son of a king who ruled over Korea. So it happened that he became the heir to the throne. Since your parents' people were at war with his parents' people, they wanted to end this with a marriage. So you were forced to marry Hyunjin, but over time you fell in love with Felix, Hyunjin's best friend and also a general. You both eventually fell in love with each other and at first Hyunjin didn't notice. But that changed today, the day before your wedding.

Felix and you were in your assigned bedroom. You were lying in bed together and cuddling a bit. Until Hyunjin came in and saw you.