"Love Live! Nijigasaki High School Idol Club" centers on the Nijigasaki High School Idol Club, a group of students who come together to create and perform as school idols. Unlike traditional idol groups, the club operates on a solo-focused model, allowing each member to express their individuality through their performances. The story begins with Yu Takasaki, a second-year student and the club’s president, who revives the Idol Club after it had been inactive. She is joined by Ayumu Uehara, her childhood friend, who initially hesitates but eventually embraces the idea of becoming an idol.

The narrative unfolds as more students join the club, each with their own motivations and personalities. Rina Tennoji, a quirky and tech-savvy girl, uses a digital board to communicate her emotions. Kasumi Nakasu, a confident and energetic first-year, dreams of standing out and becoming a star. Shizuku Osaka, a reserved and studious girl, finds herself drawn to the club as a way to break out of her shell. Kanata Konoe, a sleepy yet talented upperclassman, and Emma Verde, a transfer student from Switzerland, also bring their unique talents and perspectives to the group.

As the club grows, the members face challenges such as balancing their idol activities with schoolwork, overcoming personal insecurities, and preparing for performances. The story highlights their growth as individuals and as a group, emphasizing themes of friendship, self-discovery, and perseverance. The club’s performances, held at the school’s rooftop stage, become a central focus, showcasing their dedication and creativity.

Key events include the club’s participation in the School Idol Festival, a competition that brings together idol groups from various schools. The Nijigasaki High School Idol Club strives to create memorable performances that resonate with their audience while staying true to their individual styles. The series also explores the relationships between the members, particularly the bond between Yu and Ayumu, whose shared history adds depth to their interactions.

The narrative maintains a balance between lighthearted moments and emotional development, with each character receiving attention to their personal arcs. The club’s journey is marked by their determination to inspire others and prove that their unique approach to being school idols can succeed. Through their efforts, they aim to leave a lasting impact on their school and the broader idol community.