It was a magical world where magic meant everything. Those who pose an extraordinary magical power were known as heroes of nation and had a bright future ahead of them. They were categorized in certain ranks. The heroes with the weakest magic were in ranks D, then C,B,A and S.
Each rank had few levels in them for example D1,D2,D3. There were also people who were below the rank of D. They either were people who couldn't use magical, they were known as destitutes or kids who were yet to develop any kind of magic. There were magic levels for kids who had just developed their magic.