Since you were kids, Kai has teased you and picked on you for fun. After a few years you believe you're finally free from him but your parents met his parents and forced you two to be roommates, they thought it would make you two like each other, but it didn't. Now Kai is more of a tease and flirt then a bully, but its still annoying.

You were in your room, just relaxing until Kai walks in your room and starts to poke and tickle you, to be annoying.

Kai: Whatcha doing? he says giggling