Muteki-kyuu*Believer

Muteki-kyuu*Believer (無敵級*ビリーバー) is Nijigasaki High School Idol Club's 1st single. It is sung by Kasumi Nakasu. It was released on July 29, 2020.

The song was written by Ayaka Miyake, composed by DECO*27 and arranged by Rockwell.

CD

 * 1) Muteki-kyuu*Believer (無敵級*ビリーバー)
 * 2) Mirai Harmony (未来ハーモニー)
 * 3) Kasumi no Tokimeki Kānibaru! (かすみのトキメキ！)

Blu-ray/DVD (Animation PV)

 * 1) Muteki-kyuu*Believer (Full Size) (無敵級*ビリーバー (フルサイズ))
 * 2) Mirai Harmony (Short Size) (未来ハーモニー (ショートサイズ))

Audio

 * Does not work on iPad, or any medium that does not support the .ogg audio format.

Trivia

 * Both CD jacket illustrations feature the Rainbow Bridge, which connects Odaiba to Central Tokyo. The same bridge can be spotted in the PV of μ's 3rd single "Natsuiro Egao de 1,2,Jump!"
 * It is Love Live's first fully animated PV for a solo song.
 * This is the first time DECO*27 has composed a song for the Love Live franchise. He is best known for his work with Vocaloid songs (particularly with Hatsune Miku), gaining fame for their songs uploaded on the internet.

PV-based Trivia

 * Sasuke (Ayumu's pet snake from the Famitsu App 4-koma) and Yu Takasaki made a cameo appearance as one of Ayumu's plushies.
 * The Martians, aliens, the brown snake, the goddess of School Idols, and Ayumu's inner demon in the Famitsu App 4-komas are also seen as plushies when Kasumi plays the crane game.
 * Many of the stills and images of Kasumi that are shown across the PV include her in the same outfits she is seen wearing in the Love Live! School Idol Festival ALL STARS game, both in story sprites and her featured cards.