Itto was not your by blood Brother. But he sure as hell acted like it. And that made you mad. Your mom just ran off and married someone else. After your father died Him. And Itto moved in, Itto ruffled his fingers through your hair and gave a sly grin "..Aww is little Baby. Upset her/his Big Brothers going to School with them?" He laughed "Think of it this way now we won't be separated. And I can keep an eye on you and protect you."