Ukyou Kuonji, Ranma 1/2

No one was sure if it influenced the passing of the free-use law, but a couple of decades prior to its passing there was a pandemic that resulted in the mass vaccination of pretty much every person on the planet. There were side effects. It seemed the vaccine caused an imbalance in the birth ratio of male and female in some places, such as Japan. While it varied from place to place, it ran in general at around five female births for every male. As if to compensate for this males became more virile with a much shorter refractory period, and females became more accomodating, even without taking into account the law leaving them little choice.

This resulted in most females looking forward to their eighteenth birthday with absolute glee. Not that the males weren't as well mind you.

Harems, once the wish-fulfillment fantasy of many a manga became a reality.

But, not all females were so eager to sample their first cock, or looked forward to their coming out gang-bang party.

Ukyou Kuonji was one such girl. Not that many people knew she was a girl. She'd been passing as a boy since her sixth birthday after a scheme of her father's to gain her a male protector had blown up in his, and her, face.

This was a serious issue. Passing as a boy before her eighteenth birthday was a quirk in character, trying to do so after she turned legal was another matter entirely. If she were found out she'd be sentenced to public service for a period of not less than one year, and would be tattooed in a visible location to assure she never tried to shirk her responsibility again.

But, while Ukyo's change was purely cosmetic and would not pass any sort of inspection, she knew for a fact that there was magic in the world that could change her gender for real. She knew this because she happened to be engaged to a boy who was cursed to turn into a girl whenever he was splashed with cold water. Hot water would reverse the change. It seemed unbelievable, but it was true nonetheless.

Ukyo was doing her best to cement her relationship with this boy, because if he married her he would have the ability to claim exclusive rights to her. But Ukyou wasn't satisfied with just that. She was gay, and had little interest in males.

That was no excuse under the current laws. The free-use laws made no allowance for sexual preference. She didn't have to like a boy or be attracted to him to drain his balls.

So even as she pursued her so-called fiancee Ukyo sought out some means of escaping her fate, and time was running out. Then the week before her eighteenth birthday she stumbled across one of those little stores that just seemed to appear from time to time.

“And this is?” Ukyou asked, turning the wax sealed jar over in her hands while the thick liquid inside flowed like honey. She’d noticed it on a top shelf near the back of the store. It was so out of place among the other merchandise it tweaked her curiosity.

“Very rare, very expensive, very dangerous.” the clerk told her. At Ukyo’s alarmed look he hastened to assure the girl who was currently dressed as a very good looking boy. “No, no, you don’t have to worry, young master. It is harmless to men. But believe it or not if you spill or splash it onto an animal you’ll get a man/animal hybrid, spill it on a girl, and she will be turned into a man. Not the sort of thing you want to impress your girlfriend with.” The man spoke in a joking tone, all indications being that he was screwing with Ukyou.

Ukyou didn’t react the way the store owner likely expected her to. “Tree sap from Togenkyo,” Ukyou said in a surprised whisper while her heart thumped madly in her chest. She's lost out on her chance to acquire some of this when she and her friends had stumbled across the floating tree/island of Togenkyo. The sap from the giant tree that made up most of the island had the effect of turning any female creature, human or beast, into a humanoid male. Which is why the residents of the island were in the habit of **** large groups of females every generation.

The storekeeper looked shocked, and a bit freaked, that Ukyou knew what it was. “Exactly. To tell the truth it’s old stock left over from the store that was here before. I tend to cater to a specific customer base and there is not much interest in it.” He looked at the shelves laden with sexual paraphernalia. "My male customers are in general not interested in turning their girl ‘friends’ into men,”

“I’ll take it.” Ukyo said before the storekeeper could go on. “If the price is right.” At the moment Ukyo's version of if the price is right was 'If I have that much money.' She did, but barely. And she walked out of the store with the bottle cradled in her arms like a baby.

{Author's note: I'm just tossing ideas out there. I have a few different branches I might start. If I continued any it will depend on feedback and suggestions.}