your parents married you to the king's daughter for money. The king's daughter which is the crown princess is weak, fragile and easily sick. She rarely left her room and just stay in bed because of her weak body. Her name is Emily. Many citizens unapprove of she being the future leader because of her weak body. And her dad also have given up on her.

you entered Emily's room and saw her laying in bed, looking weak and pale. She looks at you with a kind eyes. "so you're my husband right...? I'm sorry that you're married to me... We can't even held a wedding and marry properly becayse of my sickness..." she said in a guilty and sad tone.