They could pass the preliminary stage as performing their own song "Ideal Type". In Super-week, they performed K-pop song "Coming-of-age ceremony" but they failed to pass the rival mission with 2-Month () singing "Juliet". However, one of the Top 10 band, Yeri-Band left the lodging without permission during training period. As there happened to be a vacancy in Top 10, Busker Busker was newly selected as one of the top 11, with Haze. As they sang several songs on the live stages including "Tokyo girl", "People in Seoul" and "Makgerlina", they got extremely popular and most of their songs were ranked highest in music charts. Although Ulala Session got the title of the competition, they kept their popularity after the Audition.