Shuumatsu no Jinrui ni Bunmei wa Hitsuyou desu ka?

It's the year XXXX, and the world has come to an end. In this post-apocalyptic world overseen by "God", people live as if they're creatures that creep along the ground. Mankind has been nearly depleted, and Kasago is one the few people left. Kasago blindly believes in "God" and, following the commandment he was given, begins working as a "Civilization Collector" in which he steals away any scrap of culture from people. While on the job, Kasago meets Mebaru, who makes no attempt to hide her doubts and suspicion about "God". Kasago is searching for his parents, while Mebaru is searching for her parent's enemies. Thus, these two total opposites continue on their journey, coming into contact with "civilization" and collecting it...