Girl World started as a wish that Jon had that there would be a spirit in his house that enjoyed trapping men and feminizing them. The spirit manifested itself by making a computer game that Jon got trapped in, a game called "Girl World". While in the game, users forget that they are in a game at all, but think that they are in a resort where all the women are easy.
Jon was the first user, and spent a long time living out situations that kept him being more and more feminized, dressed up as a woman, even beginning to look like a woman. Each time he justified it as trying to look more manly so that if he ever found one of the Girl World women (Jon only runs into transvestites instead of women), they'd go crazy for him.
The spirit has started to emerge as a character recently, watching Jon's progress, even prodding him to change.
A new character, Kelly (now called Kelli) is a delivery man who the spirit trapped at Jon's house. He is currently in Girl World, and being put into similar situations that Jon had, although women in his experience of Girl World seem to be more up front. The spirit has even taken a character role a few times in the story.
Jon was an easy victim for the spirit. It gave me a chance to write a whole pile of fun scenes where Jon was hapless, completely oblivious to the sexual activity happening to him. Kelli seems to have a bit more awareness; not that he's in a game, but that something weird is happening. I'd love to explore that tension further, but if anyone wants to take it in a different direction, go for it.
Eventually I'd love for the two to meet in the real world and see how that plays out.