Actress Ku Hye Sun, who rose to fame in the drama "Pure in Heart" and hit TV show "Boys Over Flowers", participated in the OST Part 3 for the drama "Fly Again".
On the 31st, YG Entertainment released the music video teaser for "Fly Again" via official Youtube channel. Ku Hye Sun has teamed up with pianist Choi In Young, a team called "Documentary" for a new soothing ballad OST for the drama.
Meanwhile, Ku Hye Sun is currently appearing on SBS Wed-Thu drama series "Please Captain" as Han Da Jin.
Watch the teaser below: