Just an old friend. Yeah right. 

What happens when you begin to grow distant from the very one person you planned on sharing your entire life with?  Yoona and Luhan have grown up together---they've been with each other since the diaper ages, and now, they're finally in high school.  Maybe it's puberty, as some say, but Yoona realizes that she's becoming weird around Luhan... ...she has to fix her hair, feels the need to wear shorter skirts, and can't seem to eat as much as she used to in front of him.

      Thank God for her father's job transfer. Krystal didn't know what she would have done in her school.        Krystal's long term relationship was recently cut off by her ex-boyfriend, Lee Jong Suk.       At her new highschool, Krystal immediately gai