Juuna Harumi's purpose in life is to support the idol Fuwari Tsukishiro! But one day, the idol group of Fuwari disbands. While deep in her despair, Juuna learns that Fuwari will participate in 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!