"Love Live! Nijigasaki High School Idol Club" centers on a group of high school students at Nijigasaki High School who form an idol club to pursue their passion for music and performance. Unlike traditional idol groups, the club operates on a unique model where each member performs as a solo artist while also collaborating as a team. The story begins with Yu Takasaki, a second-year student, who revives the school’s idol club after it was disbanded. She is inspired by her childhood friend, Ayumu Uehara, who once dreamed of becoming an idol. Together, they recruit other students who share their enthusiasm for performing.

The club’s members include a diverse cast of characters, each with distinct personalities and motivations. Ayumu Uehara is a cheerful and determined girl who rekindles her passion for being an idol. Kasumi Nakasu, a lively and eccentric first-year, joins to express her creativity and stand out. Shizuku Osaka, a reserved and studious student, discovers her love for singing through the club. Setsuna Yuki, a third-year student and former member of the disbanded idol club, returns to pursue her dream of performing on stage. Other members include Emma Verde, a transfer student from Switzerland; Kanata Konoe, a sleepy yet talented singer; Rina Tennoji, who hides her shyness behind a digital tablet; Ai Miyashita, a pragmatic and tech-savvy idol; and Karin Asaka, a confident and fashionable performer.

The narrative explores the individual growth of each character as they balance their personal struggles with their commitment to the club. The idols face challenges such as stage fright, self-doubt, and the pressure of balancing school life with their performances. The club’s activities are supported by the school’s student council, led by president Shioriko Mifune, who initially opposes the club but later becomes an ally. The story also delves into the relationships between the members, highlighting their camaraderie and mutual support as they work toward their shared goal of creating memorable performances.

The series emphasizes the importance of individuality and teamwork, as the idols strive to create a unique identity for the Nijigasaki High School Idol Club. Their journey includes participating in school festivals, local events, and idol competitions, where they aim to inspire others and leave a lasting impact. The narrative is driven by their determination to overcome obstacles, celebrate their differences, and achieve their dreams as both solo artists and a cohesive group.