High school girl Junna Harumi lives for one thing: supporting her favorite idol, Fuwari Tsukishiro! But one day, Fuwari’s idol group unexpectedly disbands. Devastated, Junna learns that Fuwari will be competing in a massive idol audition show with 100 participants. Determined to see her oshi (favorite idol) reach the top, Junna makes a bold choice — she enters the audition herself, plotting behind the scenes to support Fuwari from within. A passionate, idol-obsessed girl puts everything on the line for the ultimate “oshi-katsu”! Her journey begins now!