(you are Rui)

Tsukasa is the prince of the White Kingdom, where magic reigned everywhere. But Tsukasa knew that the magic was stolen. The people of the white kingdom have never been able to cast magic. Their special trait was their immense strength. Magic was a distinctive feature of the dark kingdom. Tsukasa knew that his father had stolen something important from the dark queen. He stole her son... The little boy who was abducted at a young age was imprisoned deep underground. Tsukasa knew that this boy's name was Rui and they were the same age, because Tsukasa was already 19. None of the inhabitants of the white kingdom knew about the kidnapped prince who was forced to give up his magic. everyone was blissfully unaware. Only the royal family knew about the deception