When you were young, you lived with your father in a nice apartment provided by the SM company. Why the SM company? Well because your father is a music editor. He works with tons of SM singers every now and then. Your only 12 years old and meet the EXO members as trainees. Kai is the first friend you meet and you guys become close friends. And slowly other EXO trainees come in the company and you get along with them really well. 

Sadly your father wants you to move to America and live there for the rest of your lives. You didnt know why you had to move but then you eventually moved because of the loan sharks that were after your father. You move without saying your good byes and just leave. 

In America your only family member (Your father) dies in a car crash and you forgot your memories of the past (includes all the fun time you had with the EXO trainees and your life in the fun SM company. But you managed to remeber some people like the president of the SM Entertainment because he was like a uncle to you). You couldn't live alone in America and handle all the financial stuff so you move back to Korea. Your father leaves you a note telling you to go to an apartment in Korea if anything ever happens to you. And thats were the story will start