"The iDOLM@STER Shiny Festa" is a series of three anime OVAs based on the popular "The iDOLM@STER" franchise, each focusing on a different group of idols from the 765 Production agency. The OVAs are divided into three versions: "Honey Sound," "Funky Note," and "Groovy Tune," each featuring a distinct storyline and set of characters. The narratives are centered around the idols preparing for and performing at a music festival, showcasing their growth, teamwork, and individual struggles.

In "Honey Sound," the idols face the challenge of organizing a live concert in a remote location. The story highlights their efforts to overcome logistical difficulties and personal insecurities, emphasizing themes of perseverance and collaboration. The main characters include Haruka Amami, Chihaya Kisaragi, and Yukiho Hagiwara, each contributing their unique talents and personalities to the group dynamic.

"Funky Note" shifts focus to a different trio of idols—Miki Hoshii, Yayoi Takatsuki, and Makoto Kikuchi—as they prepare for a high-stakes performance. The narrative explores their individual motivations and the pressures of the idol industry, with a particular emphasis on Miki's determination to prove herself as a top performer. The story balances moments of tension with lighthearted interactions, showcasing the camaraderie among the idols.

"Groovy Tune" centers on the group's efforts to create a memorable performance for a large-scale music festival. The storyline delves into the creative process, highlighting the challenges of balancing artistic vision with audience expectations. Key characters include Azusa Miura, Iori Minase, and Ritsuko Akizuki, whose contrasting personalities and approaches to their craft drive the narrative forward. The OVA emphasizes themes of self-expression and the importance of staying true to one's artistic identity.

Across all three OVAs, the series maintains a strong focus on the idols' personal growth and their relationships with one another. The narratives are interwoven with musical performances that serve as both plot points and showcases of the characters' talents. The series captures the essence of the idol industry, blending moments of drama, humor, and inspiration while staying true to the franchise's core themes of teamwork and dedication.