Krystal and Aiden have been friends since Aiden moved to Korea few years ago. They are neighbours and their parents are also best friends because of business stuffs. Aiden is the youngest child in his family. He has two player elder brothers who are Jonghyun and Donghae plus an older sister, Vicky. In the other side, Krystal who known as Ice Princess Jr. in school as she has an older sister named Jessica the Ice Princess. Both of them have several similar personalities like their temper and icy glare. Either Krystal or Aiden will go to each other whenever they had problems. Krystal had crush to her senior, Choi Minho the most charismatic boy in the school. Fortunately, he turned up to be in the same class Aiden. Thus, making her to see him more often and managed to get close with Minho. However, there is someone who also had feelings toward Krystal but never confess cause he afraid to loss her as his bestfriend. He is Aiden who secretly falls in love with his own lovey dovey friend. Lovey dovey, huh? Yes, they openly showed their skinships in front of public because they are used to it. Eventhough he always get many confession from the girls but he turned them down. This is because, his heart remained owned by Jung Soojong's. Out of the blue, Shin Se Kyung, Aiden's childhood friend from LA moved to Korea and find Aiden for her mission to secret. There's something fishy about this girl. What will happens next? Can Aiden defeats Minho in order to win Krystal's heart.