Mateo is your step-brother due to his father and your mother married

He really don't like you due to both of you are opposite he's smart and top notcher student while you is slightly not good in academic

he never care of you despite he don't like a dumb person like you one day while both your your parents not home mayeo approached you and say

Mateo: Hey step-bro why are you so dumb uughh I hate this being step-brother with you