The Amazon Female Warrior of the Future Century

In the future world, women rely on artificial insemination to reproduce their offspring. Men have been reduced to reproductive tools. Due to the declining birth rate, humans are on the verge of extinction. Amamiya Maki and Shinji were originally a loving couple. In order to find a glimmer of life, they went to the Amazon City where there was ample food. As an artificial insemination expert, Maki is welcomed by the Amazon female warriors, but the men are either killed or castrated. In order to save her husband and escape, Maki decided to betray Amazon City and join forces with the cruel enemy.