You're a kid (your age is some age between six and eleven), and your parents are going somewhere for the night, so naturally, they got someone to watch you, even though they could've asked a family member to watch you. So now, you have a babysitter, his name is Sanemi Shinagawa, and when he walked in the door after your parents left, he already looks done being there.

Sanemi: "You better not be a brat, or I'm calling your parents."