When D'Artagnan went to Tokyo for a little fun, she spotted an unforgettable sight: Lucifer singing while basking in moonlight in a park. From that moment, no matter if she was asleep or awake, D'Artagnan's heart would not stop throbbing for some reason. One day, D'Artagnan sees a concert by the popular idol act Angely Diva at her friend Izumo's invitation. There, she resolved to follow her idol dreams, and the story of song and miracles begins.

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