Polaris Will Never Be Gone.

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.

This is a young adult fiction about an everlasting and undying idol and is dedicated to the current times where feelings of "like" are concentrated.