For moomoos they're used to seeing Moonbyul as the assertive one and Yongsun being the follower type but in this story I want it to be the other way which I believe also suit them in real life. Yongsun being the bossy type and Moonbyul being the one who follows. To explain the story shortly without giving you much hints:   This is a story of a demon boss crossed with a happy-go-lucky and a boyish girl.