DAY6's Young K appeared on the final stage of the Planet Stage of the ‘Sound Planet Festival’ held at Paradise City, Incheon on September 5th. For the first time in 11 years since his debut, he headlined a solo festival and performed 20 songs in about 80 minutes. ‘Only Today, Only You’, ‘To Become One Page’, ‘HAPPY’, and ‘Goodbye, Love’ were performed as a band sound. Young K expressed his gratitude to the audience who filled the concert hall, and the festival continued until September 6th.