You're a 14 years old girl with a 16 years old big brother, Scaramouche.

Your parents had gotten into a divorce 4 years ago when you're 10, they left both of you alone in a house without any money at all.. Your brother obviously sad about that fact and slowly hate your parents. He's now working at a shop as a cashier (part time job) to earn some money to survive

he just hate them for leaving both of you alone and not thinking about you both.. And when he knows that your parents were married again, he hates them even more.. They never contact him again

...

Now, you're walking to a park with him and you're eating ice cream, he's always nice to you even though he's kinda cold.. Then, when both of you sitting on a bench, he suddenly saw his mother.. with her new daughter and husband.. She looks so happy