Mio is inspired by finding a tape of the previous club's performance, and gets the band together to practice over the summer for an upcoming school festival.

Azusa Nakano joins the Light Music Club but realizes that the laid-back club might not be for her, and Azusa’s membership is at stake.

Maki, a friend of Ritsu Tainaka, invites the club over for a performance at a live house on New Year's Eve. Accompanying the club, Catherine is reunited with her old friend Janice.

Azusa and Ui, along with their classmate Jun, spend time together while the third years are on their trip to Kyoto. Noticing that Ui would be lonely without her sister around, Jun and Azusa decide to sleepover at her house.

An exceptionally hot day launches a crusade to have air conditioning installed in the club room.

While the club room is closed for repairs, the girls have nowhere to practice. All is not lost, though, because the girls finally write lyrics to the music Tsumugi wrote.

The girls decide to record an album as an emblem of their time at the school.