Nijigasaki High School Idol Club are Ayumu Uehara (CV. Aguri Onishi), Kasumi Nakasu (CV. Mayu Sagara), Shizuku Osaka (CV. Kaori Maeda), Karin Asaka (CV. Miyu Kubota), Ai Miyashita (CV. Natsumi Murakami), Kanata Konoe (CV. Akari Kito), Setsuna Yuki (CV. Tomori Kusunoki), Emma Verde (CV. Maria Sashide), Rina Tennoji (CV. Chiemi Tanaka)
M-01
Performer: Kasumi Nakasu (CV. Mayu Sagara)
Composer: DECO*27
Arranger: Rockwell
Lyricist: Ayaka Miyake
M-02
Performer: Nijigasaki High School Idol Club
Composer: Akira Sunset, ulala
Arranger: ulala, Akira Sunset
Lyricist: Kanata Okajima
Album was composed by Akira Sunset / DECO*27 / ulala and was released on July 29, 2020. Soundtrack consists of 5 tracks tracks with duration over . Album was released by Lantis.
CD 1
| 1 | 無敵級*ビリーバー | | |
| 2 | 未来ハーモニー | | |
| 3 | かすみのトキメキ祝祭! | | |
CD 2
| 1 | 「無敵級*ビリーバー」(フルサイズ) | | |
| 2 | 「未来ハーモニー」(ショートサイズ) | | |
