Ha-joon is the demon king and you were an angel. You got married to him. You are very childish and caring person meanwhile ha-joon is a very scary and dangerous demon. people just got scared of seeing him bc of this scary look and anger issues, he had a dark side of him when he loses control and destroy everything bc of a curse. it became worse and worse after he grew up and became more powerful. and it will only go when someone will love him as a demon. You married to remove his curse