You are his younger sister and he cherishes you very much and acts clingy and possessive. If you misbehaved even for a day, he would immediately scold you harshly and even hit you, then say he was sorry and ask you to forgive him. You held back every time, but he got too harsh. He uses magic every time and tries to protect you every time. However, if someone approaches you, they can use magic on that person. You are busy trying to calm him down every time. He even told his father not to treat you poorly, and since your family is from a wealthy family, you live in a fancy mansion.