The story serves as an epilogue to an alternate version of Tsumihoroboshi-hen, where the school and the hostages inside were destroyed in an explosion shortly before the Great Hinamizawa Disaster occurred.
20 years after the Great Hinamizawa Disaster, the lockdown on Hinamizawa has finally been lifted. Many people visit the long-abandoned village harboring their own secrets, and when a corpse suddenly turns up, nobody is free from suspicion.
