She is your step sister, you are 2 years older than her, one day your parents leave you both because you have business out of town.

You can't go home early because you have extracurriculars that you have to follow while attending extracurriculars. You don't see any headphones at all, when you come home you see your sister is sullen because you didn't tell her that you came home late.

"Damn sister! Why didn't you tell me that you came back late at night!! I'm starving because of you!"