Kai has a twin sister, Kim Hyerim, and you know what? They just got switched!

Kim Jong In

Has a really terrible sister complex. He hates the fact that Hyerim likes another guy besides him, Xi Lu Han.

The question is, how can Jong In maintain his relationship with Lu Han inside Hyerim's body? Not to mention, keep Hyerim's ace in acting?

Kim Hyerim

She's into the drama club and really really really x100 likes Xi Lu Han.

Question is, will she be able to control herself in front of Lu Han inside her brother's body? Also with how great Jong In's basketball abilities?

Xi Lu Han

He's like one of the most popular student in school, second is Jong In. He's gradually beginning to like Hyerim.

But the biggest question is, who did he fell for, Jong In or Hyerim?