University Trainer NSFW

Near future. Unknown virus came to earth. Infected by it, no female can get pregnant. This made human race extinct as a specie. Secret scientists offered their help to fight this disease. They fertilized our women with special goat genes, so their kids become race known as Satir. Horned girls, immune to virus for some time. But if they breed with male that has right genome - their kids will be fully immune.