Mirai Kasuga, who wants to carry on a dream she has yet to see. Shizuka Mogami, who yearns to be an idol and is shaken. Tsubasa Ibuki, who does not know what she can be serious about. At 765 Production new idols gather and everyone's "dreams" will brought into brilliance at the theater! The long-awaited anime of "The IDOLM@STER Million Live!! (Source: Official Site, translated)

Mature grade school student Arisu Tachibana is an aspiring idol who receives an invitation from her company president to participate in the Third Entertainment Section—a new idol project. Arisu and eight other young girls soon meet their producer before beginning idol-related activities. To the girls' surprise, their producer appears to be a childlike adult and nothing like what they had imagined. The producer, who is taking on the position for the first time, also had no idea that he would be meeting a group of short, young idols. The awkward situation leaves Arisu disappointed, and she wishes for a producer change. However, the producer, with his genuine love for idols and his desire to see them shine, will not let this opportunity pass and expresses that he is serious about working with the girls. Thankfully, the young idols accept the producer after seeing his unwavering passion for idols, serving as the start of their journey to the stage of dreams.

In 2242, the remnants of humanity are forced to live in scattered bubble-like cities across devastated lands. Hiding from toxic rain and hostile lifeforms known as Enders, they survive thanks to a new source of energy from AO crystals. Those tasked with risking their lives to collect AO crystals are called drifters, piloting versatile bipedal tanks with the support of combat androids named magus. While exploring remote ruins with his exceptionally gifted drifter friend Tokio, prospective drifter Kanata uncovers Noir, a seemingly intact magus in stasis. Although she wakes up by herself, Noir has lost her memories and is of no help in Kanata's work. However, amid an Enders attack, Kanata discovers that Noir possesses remarkable combat abilities. The pair now embarks on a journey to not only shed light on Noir's past but also to uncover the location of Histoire—the mythical city harboring secrets of the world that Kanata has always dreamt of visiting.

An ambitious producer who works for 283 Production aims to guide his idol units to fame and victory at the Wonder Idol Nova Grand Prix (WING)—a prestigious competition for rookie idols. Although he is already in charge of multiple units, a fateful encounter with the skilled songstress Mano Sakuragi leads him to create a new promising group: illumination STARS. Now an aspiring idol, Mano pursues her dream with the support of her fellow members Hiori Kazano and Meguru Hachimiya. At the same time, the producer seeks to increase the visibility of his other units, aligning with his true goal of helping them grow as professionals and understand what makes them shine the most. Indeed, only those who know themselves have a chance to become the new rising stars of the industry.