I have very little story idea built up. I just saw these images and thought it would be fun to use them as roleplying inspiration.
I'd hope to have a game where there was someone to play the characer(s) in each photo, but with other characters around as well. The zodiac girls should exhibit at least some of the typical qualities associated with the sign they're representing.
I like to keep things free-form and develop a story together with my partners rather than rule a game with an iron fist as a GM who just says "yes" or "no" to everything.
So, a lot is still open for discussion. Allowing people to play multiple characters will be a great idea, since having 12 people (14 if each individual is played instead of one playing both characters in a singular picture) would be a great feat in and of itself, adding in other characters (for example: men) would make it even more difficult to maintain. (Please refrain from claiming more than one of the girls for the time being, though. I want to give as many people a chance as possible.) Breaking all the characters up into separate games might work as well - I'm anxious to hear what everyone else comes up with.
We can put our game in the forum area that equates to the strongest interaction that any player is interested in, but long-term erotic interaction that doesn't require the attention of the other characters or any erotic acts that involve less popular kinks should take place in a solo/small group thread specifically made for the interaction. That way no one has to watch what they're not interested in and everyone else's sexual posts don't end up staying the flow of the story in the main thread. Sound good?
I listed the zodiac signs in their traditional order and under no particular role of importance.
I may be interested in playing Libra - since that's my sign - but I'm more than willing to let her go if someone else wants her. A lot of the other girls interest me.