In the first life, she was her blood enemy. However, due to a twist of fate, they were originally enemies of gods and demons, but they eventually fell in love and fell into the mortal world.
In the second life, she was her knight, but she actually wanted to marry someone else for the sake of the country. When the castle was breached, the two made a promise of love in the fire.
In the third life, she was her assassin, but she was the ultimate successor. After experiencing various hardships, the two finally got married.