How if you, a Korean girl who moved to German make a promise with Onew, your childhood friend, a promise that you-might-regret for all your life? A promise with your friend that now become a leader of shining boyband, SHINee? Will he still remember you after these 12 years? Will you still become his bestfriend when he already had Sue to replace your position?

You're a brilliant girl. You're just 17 and already graduated from high school in US. Your parents got divorced. While your big brother Onew stay with your mom in Seoul, your dad took you with him to US when you're only 4. You took 3 times acceleration class, and become the youngest graduate there. You're planning to enter a great college in US but suddenly your father passed away. Then, your mom called you and told you to move back to Seoul. You told her about your dream but she disagree,