The deep space exploration ship Venus II was launched with a five year mission to seek out habitable planets. It was also an experiment to see how the crew would hold up over the course of such a long time in space. The intent was for the ship to be crewed by to men and two women, and to make every attempt and sexual compatibility between the four of them.. after all, five years was a long time and such things needed to be taken into account.
However, due to a serious break down in communications between the various departments, only one woman was ready for the mission by the time it was nearing to launch, and the launch window was such that they couldn't wait for the any of the other female candidates to get up to speed. Nor could they launch the Venus II with anyone who hadn't been fully and properly trained. So they had no choice but to go ahead with only the one woman, along with the two(or three) men who had also been training to undergo the deep space mission.
I am going to play the lone female, a woman named Glacia who is somewhat of a scientific prodigy. Not only is she fairly young for an astronaut, but with modern medicine she appears to be about eighteen years old, even though she is in fact in her late twenties. She is nervous about being the only woman on board, she knows that there could be some competing for her attention, and she is convinced that the best way to make the situation work for any protracted length of time is for the whole crew to become comfortable with sleeping together.
It doesn't matter to me what the other players' genders are, but for the characters I am looking for them to be male... they can be straight or bisexual, as long as they are willing to share Glacia with one or two other men in the same bed. When I get a few interested players, we can discuss how much we want to try to focus on any non-sexual aspects of the story as well.