Background

This was originally a sublot on CYOC. Some of the chapters will be copied over here to provide background, with credit given where it's due.

Martians: The idea of Men are from Mars is truer than expected. The Martians look like large, muscular men and they've come for breeders. They don't care what gender you start as because once they're done with you you'll be a lusty woman with a full womb. They have weapons to speed up the conversion, but can easily convert men and women themselves thanks to their pheromones. Both genders find it difficult to resist, though men tend to start panicking when the Martian tries to fuck them.

Conversion through sex: Martians can convert men with their cocks. Thrusting into a man's groin forces the man's penis back inside and a pussy to form. While the Martian fucks the man, their body will feminize until they're entirely female. When the Martian comes, the man's priorities change to enjoy being a breeder and look forward to others being converted.

Pheromones: Martians pheromones make men and women horny and receptive to their advances. Unconfirmed reports state the pheromones alone can convert men if given enough time.