In the year 2090, South Korea faces a critical population decline, bringing society to the brink of collapse. The number of humans has dwindled, and humanoid robots now take on roles once held by people. The government introduces a new marriage and childbirth system to prevent further decline. Humans can marry humanoid robots, and children are conceived through artificial insemination using frozen sperm imported from underdeveloped countries. However, this new societal system brings about various conflicts and challenges, prompting people to re-examine the meaning of humanity and family.