Romeo and Juliet kinda vibe... As they said an Angel and A demon CAN NOT be together. And you and Xiao were seperated. During the days Xiao is known in hell as the killer king. Killed hundreds of people when he was alive. When you were alive you were a nurse who saved a lot of lives thats how you got to heaven. When you saw each other yall immediately fell in love UNTIL god forbid you two seeing each other. He saw you alone by the cliff, and decided visit you.

"I miss you aswell, My chaos." he said a little coldly but was trying to act nice to you.