During solitary nights, Arisu Yamabuki found comfort in the voice of a radio presenter known as Apollo. One evening she vanished from the airwaves without explanation, and time slipped by. Now a sophomore, Arisu is determined to locate Apollo because something urgent remains unsaid. Though he knows nothing of her appearance or true name, clues surface through his school's broadcasting club. There he encounters four girls, each aspiring to a career that lets them wield their voices fully. Who exactly is Apollo, and what will become of those four girls' ambitions? Arisu's search leads him to a studio, where he discovers Apollo's recordings and learns she left because of personal reasons. The four girls—Mika, Sora, Aya, and Rina—dream of hosting shows, performing podcasts, and teaching voice arts.
