Late nights brought comfort to Arisu Yamabuki through the voice of a mysterious radio DJ named Apollo. Abruptly vanishing one day, Apollo left Arisu longing for closure. Now a second-year student, Arisu embarks on a quest to find Apollo, driven by an unspoken message he must deliver. Armed with scant details, he delves into his school's broadcasting club, encountering four ambitious girls with a shared passion for their vocal talents. Together, they unravel the enigma of Apollo while chasing their aspirations to wield the power of their voices in the professional realm. Who embodies the enigmatic Apollo, and will these four aspiring talents achieve their dreams?