The daily life of the Nijigasaki High School Idol Club continues at a cheerful and rapid pace. Following the events of the main series and the NEXT SKY OVA, the thirteen members and their supporter Yuu Takasaki find themselves in a new collection of short, comedic adventures that balance their idol activities with school life. The setting remains the vibrant campus of Nijigasaki High School and its surrounding areas in Odaiba, Tokyo, where the students pursue their individual dreams of becoming school idols on their own terms.

The series features the full cast of the club, including the determined Ayumu Uehara, the energetic Setsuna Yuuki, the scheming yet lovable Kasumi Nakasu, the dramatic Shizuku Osaka, and the supportive Yuu Takasaki. Other members like the sleepy Kanata Konoe, the popular Ai Miyashita, the stoic Rina Tennoji, and the ambitious first-year Shioriko Mifune also take center stage in various episodes. The narrative often explores the chemistry between characters who rarely interact in the main storyline, such as a dedicated episode featuring Shioriko spending time with the carefree Ai.

A notable narrative arc in this season is a multi-part story where Yuu writes a ridiculous play casting her friends as delinquents facing a demon lord, with Kasumi reluctantly playing the straight man to the absurdity. This storyline is presented in three parts that are spread across the season's run rather than consecutively. Another key focus is the evolving dynamic between rivals and friends, highlighted in an episode where Ayumu and Nana (Setsuna's civilian identity) reflect on the beginnings of their friendly rivalry and how it pushed them to grow as idols. The season also dedicates time to Yuu's personal journey, emphasizing her growth from a simple fan and supporter of the idols to an active creator and a source of inspiration herself, reinforcing the theme that pursuing one's passion is a form of shining alongside friends.