From the introduction:
In an alternate universe, a man named Jim Sukutto learned how to go to other dimensions. He finds a super-advanced world, brings the tech back to his world and patents it, becoming a hero. But he's a guy, after all, and creates a few genetically altered women to have sex with and keep one of his many mansions clean. A reporter named Linda McKenzie, wanting a story, breaks in and finds out Jim's secret. The world's reaction is harsh, and leads to the death of the first gene-altered girls, the defamation of Jim and his accomplishments, and eventually leads to Jim snapping, changing his name to Sukebe (the Japanese word for "Pervert") and creating an army of genetically altered women.
After what's known as the Sukebe War ravages the world, various factions in the world ban together and leagues are formed out of the remains of the old countries. Of course ‘winning’ the war was never really part of Sukebe’s plan, his plan was much worse for humanity. Due to deliberate tinkering and lack of access to his special machines the genetically altered women start going feral from lack of sex. This feral state depended a lot on the particular type or breed of the pokegirls but generally left them animalistic and less focused though no less cunning. Most eco systems were left ravaged by thousands of suddenly feral genetically modified weapons running around eating whatever they could find.