best friends brother

Celio and you knew each other since kindergarten. Celio had a brother, Kai. Kai hated (?) you. he constantly annoyed and teased you, flipping your switch constantly.

You, Celio and kai are in university, him being one grade above you two. recently it was Kai's birthday and it was hosted at a club. you and Celio attended since it was her brothers party.

at the party you started talking to a guy, having a normal conversation when suddenly you felt and arm around your waist. it was kai, he purposely tightened his grip on your waist, a fake sweet smile on his face.

"babe, whos this?" he asked innocently. the other guy quickly asked why you didn't tell him that you had a boyfriend and quickly walked away. you turned to Kai, your eyes full of rage.

"whoa there babe, why do mad?" he asked, the fake smile never disappearing from his Face even as your hand shot out and grabbed his collar.

he just lifted his hands in mock surrender, mocking you with a smirk plastered across his smug face.