With the development of science and technology, some technologies that touch the moral bottom line have been liberalized. Human emotions were eliminated as a burden, and robots, replicants, and artificial humans began to appear. Due to the lack of material resources, most people are addicted to the virtual world. These humans and non-humans are drawn into a system called "Ark", with the purpose of exploring "what makes humans human". They enter dangerous and life-threatening dungeons and understand the teachings of their ancestors in mythology and religion. They all hope to become a pious "Noah" chosen by God and set foot on the "New World" after the "flood" recedes.
Purpose: Technology and ethics, friendship