The Kim Twins The Kim Twins is a school au fic focused on the scandalous lives of teen idols Jongin and Hyuna. They are the envy of their class mates, the pride of their parents and hiding secrets that could destroy their reputations.  Kim Jongin is a shy, timid boy. He is confined within himself but his alter ego Kai has no problems being the center of attention and has a bad habit of getting in to trouble.