>>1423378Here's the story of Rabu Raibu! (as best as I remember it so some parts might be wrong):
Otonokizaka is a high school that the second-year girl Honoka Kousaka attends. She really loves her school, but she learns that it's going to close down because nobody is applying to go there. She wants to find a way to save the school by getting people to want to attend, and after seeing the school idol group A-RISE, she decides to become a school idol to give the school attention. She, along with her friends Kotori Minami and Umi Sonada, try to form a school idol club, but student council president Eli Ayase rejects them because they don't have enough members. The vice president of the student council, Nozomi Tojo, isn't a bitch, so she sets them up with a performance. Before that performance, Honoka notices the singing talents of Maki Nishikino, but Maki refuses to join. The girls then try to advertise their concert, but when it's time for them to perform, nobody attends (or so they think). Watching them secretly were Nozomi, Eli, Maki, Nico Yazawa, Hanayo Koizumi, and Rin Hoshizora Hanayo becomes inspired by their song to become a school idol, so she, along with Maki and Rin after some bullshit, end up joining the girls, bringing them to six members. They all decide to name their group "μ's" after a submission they got (that turned out to be from Nozomi). Later, when they try to form a club, they learn that there is already a school idol-related club founded by Nico. Nico fucks with the μ's for a bit by telling them to quit being idols. This is because Nico tried to be a school idol when she was younger, but her friends quit on her and fucked her over. Eventually the six girls join Nico's club, making them an official seven member school idol group. This pisses off Eli because she thinks that they're all really shitty idols, but a few drama-filled episodes later, she and Nozomi join the μ's, giving them all nine members.