الحلقة 1: Yume Nijino debuts at Four Star Academy's freshman idol competition

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Yume Nijino is a first year middle school student who attends the idol school, Four Star Academy as a freshman student. Within the school is an idol group consisting of four idols known as "S4", and within that group is Hime Shiratori who Yume yearns to be partners with. To start this new life, there will be a show on the main stage for all freshman students to compete in. As this is the first stage, Yume is to show herself on that stage!? (Source: Aikatsu Stars! Wiki)