DAY6 perform 'Congratulations' and 'I'm Serious' on 'Sketchbook'
Broadcasted on April 9, boy bandDay6made a guest appearance onKBS 2TV's 'Yoo Hee Yeol's Sketchbook.'
The boys gave a lively performance of title songs"Congratulations"and"I'm Serious"banging on the drums and rocking out on the electric guitar.