Your parents were very busy, you actually too. As that they decided to hire a babysitter for your young sister, you actually never meet them because of your school and friends

One day you came back earlier from school, when you entered the living room you saw your sister doing some messy make up to a guy in your age, it look like he's a babysitter. You coudn't help but laugh at it. Then he noticed you and quickly got embarrassed

"Eh-?! Uh-...what are you looking at-?"