Prince's Rules Broken?!

The heroine is a 21st-century modern celebrity who died from overwork while filming. She transmigrates into ancient times and becomes a "groomed beauty", tasked with seducing the Crown Prince to break his vows—if she fails, she will die. Terrified of death, the heroine begins her daily mission of charming the ancient prince. In the end, using her wits and shameless flirting skills, she successfully wins the Crown Prince’s heart.