Nijigasaki High School Idol Club is a unit created in the multimedia franchise "Love Love!". Along with its eponymous anime series, it was created to be the main group of the game "Love Live! School Idol Festival All Stars" (LLSIFAS), the third major installment in the series. It was initally announced as the "Perfect Dream Project".

There are twelve members:

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)
Setuna Yuki (CV. Coco Hayashi)
Emma Verde (CV. Maria Sashide)
Rina Tennoji (CV. Chiemi Tanaka)
Shioriko Mifune (CV. Moeka Koizumi)
Mia Taylor (CV. Shu Uchida)
Lanzhu Zhong (CV. Akina Homoto)

These members are divided into four subunits, named by a fan vote that concluded on June 10, 2019:

DiverDiva (comprised of Karin & Ai)
A·ZU·NA (comprised of Ayumu, Shizuku, and Setsuna)
QU4RTZ (comprised of Kasumi, Kanata, Emma, and Rina)
R3BIRTH (comprised of Shioriko, Mia, and Lanzhu)

The project began with a fan poll, asking players of the game "Love Live! School Idol Festival" to vote for their favorite normal-rarity character. On September 21, 2017, the top three (Emma, Shizuku, and Kanata) were announced to be "transfer students" to a new school, forming a new school idol club with six other original characters.

After being introduced in the story of LLSIFAS, Shioriko was announced as the tenth member on August 3, 2020. Similarly, Mia and Lanzhu became members through the story of the game, officially joining on August 31, 2021.

On November 1, 2022, Tomori Kusunoki announced that she would be graduating from the role of Setsuna due to a health condition. The role was officially transferred to Coco Hayashi on April 1, 2023.

Another member, Yu Takasaki (CV. Hinaki Yano), was introduced in the anime representation of the unit. Though mostly appearing in a support role, Yano was credited with her first Nijigasaki-affiliated vocal credit on the "NIJIYON" OP, "Whatchu Gonna Do".