Solar has released a new OST song!

On December 24 KST, the MAMAMOO leader unveiled the music video for her song "Blue Bird," a track on the OST for JTBC drama 'Run On.' The delicate ballad tells the listener, as well as the main characters of the drama, to let go of their hard days and fly freely with the blue birds they dream of.

Meanwhile, 'Run On' tells the story of Gi Sun Gyum (played by Siwan), a former sprinter working to become a sports agency, and a subtitle translator Oh Mi Joo (Shin Se Kyung). The drama premiered on December 16.

Check out the music video for "Blue Bird" above!