Mayonaka Heart Tune

Arisu Yamabuki found comfort in the voice of "Apollo," a radio broadcaster, when he was by himself in bed at night. But one day, she just stopped airing without giving a reason. Years then passed, and Arisu is now a second-year high-schooler. He decides to look for Apollo since he has something important to tell her. Despite not knowing her true name or appearance, he is able to gather some information about her through the broadcasting club at his school. There, he meets four girls who all want to work somewhere where they can use their voices to their maximum potential! Who is Apollo, and what will become of the dreams of those four people?