Its going to a pretty popular world, infact this train is a bit more crowded then the others. Even on slow nights there's always one or two people on it.
This train is going to a world where all humans are physically female. Gender expression still exists on the same spectrum, with more masc women taking the roll that men otherwise would to some extent. But on a fundamental level there are no men. 100% of the human population is XX, with breasts and a vagina and everything. Most of human history and society still happened in this world, just with every man in human history being a woman instead.
In terms of sexualtiy every women is essentially gay. Though masc/fem relationships are the most normalized. Women can get eachother pregnant from mixing vaginal fluids, though anatomical structures are mostly identical to our world's women.
Its an exciting train ride to go down. For some it's a means of reaching a better world, for others just a way to experience something diffrent. Now who are we looking at on this train today...