Komugi Yoshida is a somewhat clumsy second-year middle-school student whose strong point is her spiritedness. She performs as an idol like Kokona Saionji (her classmate and close friend) and Tsukasa Kisaragi (an idol who dresses in male clothing). However, unlike Kokona whose popularity is skyrocketing and Tsukasa with her charisma in male attire, Komugi's only gigs are low-end ones like those at the local shopping district. Still, Komugi has her "dream" as she lives her dual lives as a idol and a middle school girl. One day, a mysterious injured creature named Usa-P appears before Komugi and asks if she wants to be a Legendary Girl who can use magical powers. She reluctantly becomes Magical Nurse and fights waves of masked figures. Meanwhile, a Magical Maid and a Magical Sister also show up.