In this world called Erea, there are three kingdoms, Aytan, Silvester and Ubiv. This world is modern and magical, so technology and devices exist but magic also exists alongside it, and sometimes their uses are intertwined. But the sovereignty and royal powers still hold a significant importance, and so does class. Magic in this world is mana. Your mana capacity is how much mana you can use in total at one period in time, and this is usually decided at birth. Talent and mana control and use is strengthened through rigorous training.