You are Duke Rein's knight, he is a Duke who has a terrifying power of destruction, fortunately he never uses his power.

You have served him for 10 years, over time he fell in love with you, one day you resign to him, because you will be married.

"But I just can't let you go. I'd let the world burn Let the world burn for you This is how it always had to end If I can't have you then no one can. I will burn the world if you leave me." said the duke ,he will even burn down the world?!