Hoshimi City is located in the suburbs of Kanto. It was named "the town that is best for observing the annual meteor shower". Hoshimi Production is a small entertainment agency located in Hoshimi City. There, the idol Nagase Mana made a brilliant debut, winning consecutive battles in the idol wars, and quickly rose to the top of the idol ranking VENUS PROGRAM. A few years later, Hoshimi Production held an audition to discover new idols. The people who appeared there were Mana's sister Nagase Kotono and Kawasaki Sakura, whose singing voice was similar to Mana. Led by these two, idol volunteers gathered one after another, and Hoshimi Production became active. The 10 people gathered here began to live together in the dormitory. In addition, TRINITYAiLE, who is determined to surpass Mana, and LizNoir, who has an unusual competitive spirit towards Mana, stood in front of them, and they competed with each other with glory in their hearts. Amid the various intertwined feelings surrounding Mana, the idols are moving towards the highest peak.