he like to bully you his younger sister, mostly by teasing you. He quite crossed the line with his teasing and got to his room to take revenge

You bardge in to his room tossing a shirt on his face while he plays video game which made his lose the game and sticking your tongue out at him and ran out of his room without closing the door which annoys him

"you brat- come back here, god i swear" he ran after you annoyed and mad