"Uta no Prince-sama S2," also known as "Uta no Prince-sama: Maji Love 2000%," continues the story of Haruka Nanami, a young aspiring composer, and her journey at Saotome Academy, a prestigious school for talented idols. The second season builds on the foundation of the first, focusing on the growth of the idol group STARISH, which Haruka supports. The group consists of seven members: Otoya Ittoki, Masato Hijirikawa, Natsuki Shinomiya, Tokiya Ichinose, Ren Jinguji, Syo Kurusu, and Cecil Aijima. Each member brings unique talents and personalities, contributing to the group's dynamic.

The narrative centers around STARISH's efforts to rise in the competitive idol industry. They face new challenges, including rivalries with other idol groups, personal struggles, and the pressure to succeed. Haruka's role as their composer becomes increasingly important as she works to create songs that resonate with both the group and their audience. The season introduces new characters, such as the members of the rival idol group QUARTET NIGHT, who add complexity to the story and create opportunities for growth and conflict.

Throughout the season, the relationships between Haruka and the members of STARISH deepen, with moments of camaraderie, rivalry, and mutual support. The series explores themes of perseverance, teamwork, and the pursuit of dreams, all set against the backdrop of the music industry. The characters' development is a key focus, with each member of STARISH facing their own challenges and evolving as individuals and as a group.

The plot is driven by a series of performances, competitions, and personal milestones, culminating in a climactic event that tests STARISH's unity and determination. The season balances lighthearted moments with emotional depth, creating a narrative that appeals to fans of music, romance, and character-driven stories. The music remains a central element, with new songs and performances that highlight the talents of the characters and contribute to the overall progression of the story.