Sehun, Kai and Kyungsoo were friends since kindergarten. They were always together. Just the three of them. One day, Kyungsoo fell in love with Kai, and decided to ask Sehun for help. Because they were friends. He helped them, of course. They ended up together. Kai and Kyungsoo as a couple, and their best friend Sehun.

Three years ago, a new student from China arrived. They met him at Chanyeol's party. Sehun met him. And he fell in love. They started dating and ended up together. 

Everyone was happy. Four friends, two couples. Luhan and Sehun. Kai and Kyungsoo. They were together. Everyone was happy.

It turned in to a different direction. Now, there also were lovers.

Secret lovers. 

Until someone finds out...