Baekhyun goes to a school with Suho. Baekhyun and Kai are cousins. Kai's dad wants Baekhyun's dad to move closer to where they live because they havn't seen each other is ages. 

Kai goes to a very known school. He's not popular, yet not a loser. He always wears pink on wednesdays. Kris is popular, girls chase around him all the time but he's too good for them so he walks around with his face as if he owns the place. Kai and Kris are aventually friends even though Kris is forever judging Kai. Chanyeol is of another specie, he's a 17 year old with the mental age of a 5 year old. It remains a mystery how Kris accepted him and Kai as he was obvouisly to cool for them.