Oh Sehun's a demon and you're a human. Oh Sehun is supposed to be the canditate for the next Demon King, but he has no intrest in it. So, to avoid it he has to take care of a human until the day he/she dies. (and you're that human!) Oh Sehun isn't pleased by it because of his cold, harsh behavior, but you bring out his warm side with your innocence, which he s