After the successful debut of the runner-up Busker Busker, Mnet’s Superstar K3 grand winner, Ulala Session will now be making their first step in the limelight as well.

Having undergone further vocal training, instrument lessons and language studies, Ulala Session is now ready to make their official debut into the music scene with their first single “Happy Day.” In the addition, the full music video for the single has been unveiled.