Jung Soojung or known as f(x) Krystal Jung is known as the very famous talented maknae and a sibling of SNSD Jessica Jung, because of their father's promise she have nothing to do but to deal with it.  She have to transfer to Seoul Performing Arts Highschool (SOPA) that has been a COED before but now it's an Exclusive School for Boys Only it has Middle School, High School & College as well ~ it's a perfect school where it has recording studio, practice room etc. it has been an entertainment though.