Idolatry

High school girl Junna Harumi's purpose in life is to support the idol Fuwari Tsukishiro! One day, the idol group Fuwari belongs to disbands. In her despair, Junna learns that Fuwari will be trying out for an idol audition program. There will be a total of 100 participants. In order to lead her idol to the top, Junna decides to take part in the audition herself and work behind the scenes. This idol-otaku girl's lifelong "oshi support" begins now!

(Source: Kodansha, translated)