Ep. 23: The Greatful Sound festival features Belle Ame, Malcolm, and Beck competing on separate stages.

During the Greatful Sound festival, Belle Ame headlines the main stage, Malcolm performs on the second, and Beck plays the smallest third stage. Veteran members of Beck believe they must retire if they fail to draw a larger crowd than the other acts. Ryusuke admits he accepted this challenge for the sake of his dream, but his harsh words cause Chiba to flee the scene. As the band begins to fracture, Taira supports Chiba while Koyuki and Saku search for him across the venue. Facing heavy rain and Chiba's absence, the remaining members consider disbanding. However, Koyuki takes the stage with just an acoustic guitar and performs a cover of the Beatles' "I've Got a Feeling." Saku soon joins him, and their rendition, featuring new instrumentals with original lyrics, captivates the audience and unites the crowd.
Episodes
- Ep. 19 · Ryusuke kidnapped by Sykes meets bluesman John Lee Davis and survives jam session
- Ep. 20 · Band members discuss Greatful Sound while Ryusuke plans to recruit Beck and Sykes for the event.
- Ep. 21 · Ryusuke proposes new songs while Koyuki creates a melody that inspires the band's next move
- Ep. 22 · Band prepares lyrics and faces stage challenges at the Greatful Sound Festival
- Ep. 23 · The Greatful Sound festival features Belle Ame, Malcolm, and Beck competing on separate stages.
- Ep. 24 · Band reforms for third stage performance as weather disrupts other venues
- Ep. 25 · Beck's Final Concert and Koyuki's Solo Opportunity After a Month and a Half
- Ep. 26 · Koyuki reunites Beck members while Ryusuke meets John Lee Davis in New York before US tour