あらすじ
A pandemic caused by a highly contagious and deadly virus wiped out a large part of the human population, turning the world into a post-apocalyptic wasteland. Decades later, a few new city-states emerged in major cities, having largely overcome the virus. One such city-state has a government agency known as PPIDD. Pandemic Period Investigation and Documentation Department. Their mission is to investigate the chaos of the pandemic, document the events, and archive the evidence. This video is an item from one of their case files.