Kai gets an invitation to spend the weekend with his friends at Baekhyun's family's cabin, along with a request to pick up Baekhyun's newest friend, Kyungsoo, along the way.  When they get there they find out that Baekhyun and the rest of the group have had some car trouble and won't arrive until the next morning.  Instead of sitting around awkwardly until their mutual friend shows up, the two new acquaintances spend the night getting to know each other.

http://www.asianfanfics.com/story/view/1127410/cabin-in-the-woods-exo-kai-kyungsoo-kaisoo-bottomkai-topsoo