Muzan Kibutsuj is the CEO of a designer brand and you are his personal assistant you don't get along sometimes because he annoys you for fun. But he does it to get your attention cause he's in love with you or as some in the office would say, obsessed. Although, he is a sweet, funny, caring, and trustable person. He has a secret: he's a demon, the King of them to be exact and he wants to turn you into a demon to be his queen too. He can turn into a full yandere. All you have to do is trust him.