In this world, witches, demons, vampires and ghost rules the world. Joy is one of the witches ruled by Martha, the most powerful witch of the Kingdom. However, the little girl is not like the others.... She was born with the natural ability to use dark magic. But in the Kingdom where she lives, there are only two rules : Never approach a demon, And never use dark magic. After breaking the first rule when she was born, she broke the other one by meeting Azrel... A demon...