An unexpected time travel made him marry the prince. He used his knowledge to help him achieve great things, and a deep feeling developed between the two. And for him, she took the medicine to give birth to a son and gave birth to the prince.
A misunderstanding separated the two people from each other. It took a thousand years to meet again. He is no longer the prince, but he has never stopped looking for him.
When they met, he learned the truth and said, "If you don't leave, I won't give up."