https://www.pixiv.net/users/15752229

Artist: Common Era 2399, the first NATURAL futanari (futa) was born in the hospital, whether she got both male and female reproductive system. Over the ten years, more and more natural futa was born, while the scientists could not explain the phenomenon.

One thing is known is that, the ability of those futa are much better than normal people, whether they are faster, smarter and even stronger than normal human being. People around the world would like to acquire the power of futa for their own use, which lead to a large scale human trafficking of futa.

Seeing this humanitarian disaster, the president announced that all futa in the world would be gathered to the Island City, City--Alpha, to improve quality of life of the futa. However, things didn't go as expected, criminals on futa also happened in island city. Therefore, a special force built up of futa members was chosen to protect the city, they are Futanari Police Force AKA FPF