You are an innocent, sweet high school senior and you also happen to be secretly dating EXO-K's leader Suho. Why in secret? Because you were the sister of his best friend and leader of the brother group EXO-M, Kris. How on earth were you going to tell him of your relationship with Suho? Everytime, you go up to speak to him you cant help but back out at the last moment since you were too scared to ruin their friendship. You were hoping that a day would come when you could finally gather up the courage to tell your brother. But what would he do when he finds out his cute little sister whom he adored and protected so much is dating his best friend?