Nijigasaki High School Idol Club
In March 2017, the official website of Love Live School Idol Festival launched a new project called "Perfect Dream Project," which features 9 new girls. Emma, Kanata Konoe, and Shizuku Osaka were three members who were already featured as N-rarity girls and topped the 3rd popularity poll.[70][71] The remaining 6 girls were later introduced: Ayumu Uehara, Kasumi Nakasu, Karin Asaka, Ai Miyashita, Setsuna Yuki, and Rina Tennoji. In August 2020, a new member, Shioriko Mifune was added. In September 2021, Lanzhu Zhong and Mia Taylor were also added.
The members are part of the school idol club at Nijigasaki High School that is located in Odaiba, Tokyo. The school is popular due to its free school style and diverse majors.[63] Unlike μ's and Aqours, they are not a group, but rather individual school idols who compete with each other; Until 2019, a popularity poll was held every month to determine their rank. Together, they are referred as "Nijigasaki High School Idol Club" (虹ヶ咲学園スクールアイドル同好会)—shortened as Nijigaku or simply Nijigasaki in the official sources. The girls were split up into groups of three to begin activities in three different apps before their addition to the game: Dengeki Online website (Kasumi, Karin, Setsuna), Famitsu App website (Ayumu, Ai, Rina), and the game's official website (Emma, Shizuku, Kanata). Each place is working as a separate room or branch office for the Nijigasaki High School.[72]
They are featured in the spin-off game Love Live! School Idol Festival All Stars along with μ's and Aqours. They also appear as SR rarity cards in ''Love Live! School Idol Festival''.[59][73] Each member also got a solo song that was released along with the group's theme song for the new game on November 21, 2018.[60] Their second album, containing more solo songs, was released on October 2, 2019.[74] The third album that also includes Shioriko's first solo single was released on September 2, 2020. The fourth album includes solo songs for the original 9 members, as well as solo songs for the three newly added members. It was released on October 13, 2021.
The names of the girls' sub-units were decided by community polls. Rather than three sub-units of three members like μ's and Aqours, the Nijigasaki girls were divided into a duo, trio, and a quartet. The sub-unit formations and naming were announced on June 10, 2019. The formations are: Karin-Ai (DiverDiva), Ayumu-Shizuku-Setsuna (A・Zu・Na), and Kasumi-Kanata-Emma-Rina (Qu4rtz, pronounced "Quartz").[75] The sub-unit's first singles were released February 12, 2020. A new sub-unit was later announced in July 2021. It consists of Shioriko Mifune, Lanzhu Zhong, and Mia Taylor. The sub-unit's name was later announced as R3birth. Their first single was released on October 6, 2021.
An anime adaptation titled Love Live! Nijigasaki High School Idol Club (ラブライブ!虹ヶ咲学園スクールアイドル同好会) started broadcast in October 2020.[76] The anime features a slightly different storyline from the game, original protagonist character Yu Takasaki, as well as cameos from School Idol Festival N-rarity girls who did not make it into the "Perfect Dream Project." A second season premiered in April 2022, with the three new members that were added to the game—Shioriko Mifune, Mia Taylor, and Lanzhu Zhong— making their appearance.[77]