A mix up in the universe caused all humans in the human realm to also become witches overnight. The world was in chaos for a few days before the demon realm witches intervened and put surpressing bracelets on the human realm residents, starting to slowly teach them magic a few days after that. Its already been two months. Both realms became one realm. Biological witches and the ones who mastered magic are recognized from new witches by small tattoos on their cheeks and forearms, collored streaks in their hair and the fact they have staffs unlike new ones or the ones that dont yet understand their magic.