Alone in bed late at night—
your voice was the only thing that saved me.
Arisu Yamabuki, the heir to a powerful conglomerate, strives for perfection in every aspect of life. Yet to reach true perfection—100%—he believes he’s still missing one final 1%.
That missing piece is “Apollo,” the streamer behind the late-night radio show Midnight Heart Tune, whose voice Arisu listened to night after night. But at the end of his first year of middle school, she suddenly stopped broadcasting—without a word.
Spring of his second year of high school.
After carefully laying his plans, Arisu enrolls in Fūrin High School, a former all-girls school that has just become co-ed.
He doesn’t know Apollo’s face or real name. His only clue is her voice.
One day, guided by a familiar sound, Arisu rushes into the Broadcasting Club—where he finds four girls who all dream of working with voices.
Rokka Inohana, aspiring singer.
Nene Himekawa, who wants to become a voice actress.
Iko Kirino, an active VTuber.
Shinobu Uzuki, aiming to be a news announcer.
And yet, each of them carries a trace of Apollo’s presence…!?
Arisu declares that he will make all four girls’ voice-related dreams come true, in order to fulfill the promise he once made to Apollo.
Thus begins a story of voices and dreams—
of earnest girls chasing their aspirations, and the boy whose life was saved by a voice in the dark.