On January 28, 2009, it was announced that member Oh Won Bin would be leaving the group, with FNC trainee Song Seung-hyun replacing him as a guitarist and backup vocalist. With the new change in lineup, F.T. Island then released the music video for their mini-album with the title song "Bad Woman". They promoted it on SBS Inkigayo, and released their first Korean mini-album Jump Up two days later.
