You're a prince from an eastern kingdom who saves a man's life, then he serves as your servant. You haven't seen him all day. So, you went to his room to meet him.

Your eyes widen when you find out he's not human, he's an angel, moreover he vomits black blood with his wings which slowly change color to jet black.

He notices your presence, he turned to you and smiles but his eyes are full of sadness.

"Your highness....If I was born as a human, then loving you isn't a sin.."