When D'Artagnan traveled to Tokyo for a little fun, she saw an incredible sight: Lucifer singing in a park while bathing in the moonlight. D'Artagnan's heart would not cease beating from that point on, whether she was asleep or awake. D'Artagnan attends a concert by popular idol act Angely Diva at the request of her friend Izumo one day. There, she made the decision to pursue her idol ambitions, and so the narrative of singing and miracles began.