Mysterious Prince Hard To Please

*She heard that he had a child's marriage that matched his family.Then he lost her.
Later on, he flattened the Royal Capital with his sword. After that terrible war, he hold her in his arm and put his sword to the emperor's neck:"I originally didn't want to put a hand in this world, but you shouldn't have touched her."
She was an ordinary doctor of the hospital, but after transmigrat to the ancient time, he inexplicably owed a mysterious prince a painting.
He said:"There are mountains and rivers in this painting."
She was in a dilemma. "How about I use my knife hand to cut a mountain for you?"
The Prince said, "you owe me a painting, where else can you flee to?"
She said, "I have the ability to retrieve something through the air, what do I need to be afraid of!"
The Prince said:"yes, You also took my heart."
Just like that they should have an ordinary life.But fate is merciless...