Rinku walks in on Rei singing her song and encourages her to perform it at the Battle Mix Party. While Rei is initially hesitant as she fears the song does not match the unit's image, she agrees upon receiving the others' blessings. As Happy Around! and Photon Maiden prepare their new songs, Rinku encounters and befriends Photon Maiden's Towa Hanamaki. After the groups play their songs, Happy Around! is voted as the winner.