As butterflies swarm the town ominously, a chilling rumor spreads among the children about a mysterious creature lurking in the school's tunnel. When Arie Kimura's mother is discovered dead near the tunnel entrance with human-like traces, the legend gains credibility. Fearing an impending apocalypse, the children decide to sacrifice Arie, blaming her for the curse. This dark deed drives Komatsuzaki, who has long harbored feelings for Arie, to the brink. Yet, this event marks just the start of the intricate Nijigahara Holograph. Spanning two timelines, the story delves into the lives of characters like the suicidal Suzuki, his obsessive admirer Higure, and the enigmatic Miss Sakaki with her concealed face. As the narrative unfolds, a web of interconnected relationships among siblings, parents, colleagues, and more unveils, intertwining fates that will culminate in a reckoning a decade later.