Polaris wa Kienai

Tajima Sora was an idol at the peak of popularity when she died and now the people who had gone crazy over her are slowly returning to days where they have forgotten everything about her. Mizu'umi is a high school girl who cannot accept this fact because the late idol is a god-like existence to her. So one day, 2 years after her idol's death, she committed a taboo act.