Princess and Prince, welcome back to Walden!!

The setting is Walden, a magical world inspired by Hogwarts. The female protagonist and Woozi, or Jihoon, are twins, a princess and a prince, members of the royal family of the magical world. They have the blood of Salazar Slytherin flowing through their veins. Many warlocks were after them, but they were protected by their supernatural powers, which had been present since birth. When the female protagonist and Jihoon were 10 years old, they went down to the human world for safety. When they wer