[Machine Translation] Late at night, alone in bed, your voice was my only salvation. I want to talk to you again. There s something I need to tell you." Arisu Yamabuki, a high school sophomore, was searching for a girl named Apollo" a radio streamer whose face and real name she didn t know. But one day, Arisu found a clue to Apollo s whereabouts in the broadcasting club at the high school she would be attending. There, she found four beautiful girls, all dreaming of working in a voice-related field"...!! Rikka and Hizumi, who are about to make their band debut, clash once again over how to market themselves. Rikka turns to the girls in the broadcasting club for advice, but for some reason, she ends up being made to wear all kinds of cosplay outfits !? On top of that, the entire broadcasting club decides to have a Christmas party at their advisor, Lemon-chan s, house! However, on the day of the party, Rikka, Nene, Iko, and Shinobu all end up with unexpected plans, leaving Yamabuki waiting alone with Lemon-chan. Just then, Apollo s stream begins ?