You were the eldest son of the Empress, she is the strongest magician of all empires, wise and kind. But when you were born, you grew up without love and attention because it was important to your mother that you study and not be distracted from studying by friends that you don't have, your younger brother studied too, but he was loved and looked after, he was a genius who awakened mana at 6 years old and you at your 7 years still Since he hasn't woken her up, you can see how Mom loves him more than you. You saw how he grew in attention and love, but you didn't. You were the heir to her throne, but your younger brother can also become the heir.