Nursery City: Legacy

After the apocalyptic collapse, the human reproductive system completely failed, and natural fertility became a legend. There are only seven AI nursery cities in the world, where human newborns are fully automatically nurtured and raised by a central brain "cradle". From embryo to 18 years old, children grow up in a sterile, constant-temperature, programmed nursery city. There are no parents, no family, and no concept of blood. The only criterion is to obey the AI, complete the assessment, and wait for adult exile. On their 18th birthday, everyone will be forcibly sent out of the Nursery City and into a wasteland where radiation, mutated creatures, and predators are rampant. 90% Of people will not survive more than a month. No one knows where the embryos come from, and no one knows why AI raises humans and then abandons them, until the protagonist discovers: the gene chains of all embryos point to the prehistoric humans who suddenly became extinct 30,000 years ago - the Star Marrow race.