On September 14, PlayM Entertainment released the performance music video of KIM NAM JOO's solo debut song 'Bird' through Apink's official SNS and fan cafe on September 14th.

The performance music video is a composition that focuses on the choreography of 'Bird' by KIM NAM JOO, and presents a new charm different from the previous version of the music video whose story was impressive. KIM NAM JOO, who perfectly digested the splendid styling and sword group dance in harmony with the mysterious and addictive sound, transformed from 'the goddess of pure white' to 'a single-shot female warrior' and exploded an intense aura.