[Oshi No Ko] Manga Volume 4 features story by Aka Akasaka and art by Mengo Yokoyari.
 
Siblings Ruby and Aqua are acclimating to the entertainment industry. Aqua debuts in a romance reality show and pairs up with Akane Kurokawa! Once the show is over, what kind of relationship will Aqua have with their colleague!? Meanwhile, Ruby's idol group is gearing up for their first stage appearance!