It's honestly not a make a friend concept... It's basically make a joke out of yoir teammate in front of a stranger... No wonder Kai didn't even keep in touch with the guests last time.. Nico was a special case cos he's also from the same company and Jay is already his friend.
it’s always so interesting to me how you will have no idea kai is friends with someone until he randomly reveals it and then you will hear about their friendship every single day from now on