"Make My Song"

Looking for more ways to gain popularity ahead of the school festival's Sunset Stage competition, the group enters a songwriting contest organized by Photon Maiden. Rinku volunteers to learn the piano to create a melody for the song, and she catches the attention of Togetsu Rei, a pianist who regularly practices in the school's music room. Rei agrees to teach Rinku how to play, but Maho points out that it would be more efficient to have Rei compose the melody herself. Although the song fails to win the contest, the four decide to use it for themselves.