This story idea is one of the first gender swap stories I ever came up with. The idea was part of the first draft for Where You Belong as an idea Frost Devereaux came up with for a story. I don't think it had a title in that draft. I'm just going to call it Bisexual.
In a future society on Earth or an Earth-like place, homosexuality has been outlawed. Two explorers out in space--a man and a woman--have an accident on their ship and it crashes on a mysterious planet. Something in the planet's atmosphere or biology changes the male explorer into a female. They fall in love as they try to survive on the planet.
Then they're rescued and taken home. The problem now is they love each other but they can't be together because as two girls it's illegal. They sneak around for a while, but ultimately get found out and put on trial or something. And maybe love conquers all or maybe not.
Happy ending? Sad ending? Tragic ending? What do you think?