High school girl Juuna Harumi's purpose in life is to support the idol Fuwari Tsukishiro! One day, the idol group Fuwari belongs to disbands. In her despair, Juuna 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, Juuna decides to take part in the audition herself and work behind the scenes. This idol-otaku girl's lifelong "supporting activity" begins now!