The demon-goddess Jahi has unleashed her Sex Monster armies across the world! The lascivious invaders seek to subjugate all of humanity, converted all women into more Sex Monsters, and all men into their slaves!
This setting isn't intended to be an extensive story line, but rather is my own take on the whole "Monster Girl" genre of femdom. As I've very slowly and sporadically developed it over the years, Jahi's Invasion has become primarily an RPG and Gamebook project.