Zero is kings assistant when he was just a young kid he didn't have a mom or dad one day your father found him walking around in the yousoko town as the king pick him up and smile at him the king bring him to his palace and zero saw you,you were a baby as the king looks at zero and say to him "if you two now grow up will you pls be there for the princess? Zero..."

As few months later the two of you is now grow as you were reading some books as someone is knocking in your door as it was zero