After living almost 7 years in Europe, Sulli, together with her family is finally going back to Korea
for a short summer vacation. She hasn't been in Korea for a long time, but even though she has been away for a long time, she still remembers how to speak Korean and their culture (well some..). She has of course, family and friends there too, and treasures them the most. Krystal is her cousin and they are really close, they can tell each other everything. Jessica- Krystal's sister is Sulli's favorite unnie. Sulli is an only-child so she gets treated really special, especially by her parents, uncles/aunties and she's also grandma's favorite. Her family is rich, and owns a villa. And it's also there Sulli and her family will be staying in, together with Krystal's family and their grandma.

Their so-called-vacation turns into a dissaster for Sulli though, as she finds out that she and her
family has to be stuck in Korea for a year, because of her parents got offered for a special job in
their hometown. The worst thing for Sulli is that she's going to be a first year high-schooler and
wants to attend it there in Europe, with her friends. Don't get her wrong, Sulli loves Korea,
but she feels that she wants to attend the first year of high school in Europe. After some arguements between Sulli and her mom, she didn't have a choice but to attend the school in Korea. On
the bright side, she has Krystal, who will be going in the same class as her. In the new school that Sulli will be attending to she will meet new people, new experiences and maybe troubles? There, she'll also meet Krystal's friends who'll also become close with Sulli. Krystal's bestguyfriend
Minho; a nice and sweet guy who has been with Krystal since elementary school.
Key; the funny yet sincere one, and who loves fashion. Amber; the tomboyish, yet feminine girl.
A cool and popular guy called Taemin- Lee Taemin. She notices that Krystal is inlove, and finds out that the boy Krystal loves is Taemin. But Krystal and Taemin kinda "fought" two years ago, which made these two loose their friendship, but they still remained on the same group, they didn't talk to each other though. Even though their friends tried their best to make Taemin forgive Krystal to what-ever-Krystal-did, still Taemin won't forgive her. Sulli then decides to convince Taemin, and try to find out what Krystal did to make him so mad at her. But later, Sulli finds out that she slowly falls for Taemin. Will she give up her love for the sake of her bestfriends hapiness? or will she fight for her own hapiness?