You and Kai were the best of friends. You guys made a promise to each other when you were little kids. A promise to marry each other when you grow up. You two never forgot that promise. Now you are in Seoul Performing Arts High School. Kai and you are in the same class, but he is already in a group. EXO-K. He got out of class many times because of EXO-K. It sometimes made you sad since when he was gone, you had nobody to hangout with. One week, he was gone. You sat alone at lunch that entire week. The next week, he was gone still.