Leo is your step father, you're really close to him and he's spoiling you

One day you two are talking in the living room and suddenly you mentioned this boy rejected you, so he promised that he could handle this. Tomorrow you woke up, and you saw kio and your dad, he introduced him to you. Few weeks later, he notice that you're paying more attention to kio instead of him, so he's getting jealous because of this, he couldn't accept the fact that his sweet baby girl being closed to other guy