Steven woke with a start, remembering what had happened just before he lost consciousness. Where was he? He could see stars, but his vision was marred with streaks of deep green. No, wait, that was something on his face, and he was outside, lying on his back and looking at the sky. He reached a hand up and brushed the green stuff off his face. Strange, it almost felt like hair, and the hand...
The hand wasn't his. It responded to his motor impulses, but it was most certainly not the slightly tanned, thick-fingered hand he had seen all his life. The skin was paler, though not pallid, and the fingers were longer and slenderer. Come to think of it, it looked quite a bit like a girl's hand. What had happened to him? He sat up with a jerk.
Things did not feel as they should have felt. The green stuff fell back into his field of view - it was hair, and long, too. Stranger yet were the sensations from his chest - there was a weight there that hadn't been there before, and strange jiggling sensations when he stopped moving. Steven began to have a vague suspicion of what had been done to him, and he desperately hoped he wasn't right.
An exploratory feel of his chest destroyed that hope. What he had felt were indeed breasts. He gasped in surprise and dismay, and it became apparent that his voice had changed too, having become softer and higher-pitched. Another quick feel, this time of his pubic area, indicated that he had been entirely right - he was now a girl.
Steven got to her feet, struggling a little to maintain her balance with her new distribution of weight. She wasn't sure exactly how large her breasts were (she guessed they were somewhere in the middle range,) but they were nonetheless heavy enough to throw off her balance. It didn't help matters that her legs were longer than before - or was it that her torso was shorter, relatively speaking? Actually, she seemed to be shorter altogether, though not a whole lot. She could see her car a little ways off, and rushed over toward it, nearly tripping several times from her balance issues.
She hunched down by the driver's mirror for a look. Her face wasn't exactly the same, but it wasn't terribly different, either - if Steven had been born a girl, she expected this was what she would look like. The hair was another matter - it was a rich, dark green, not a natural color for human hair, but it didn't look dyed...
Then again, maybe it wasn't. Green wasn't a natural color for human hair, but she didn't appear to be entirely human anyway. Her first clue were the two small horns poking through her hair. She gasped again, and noticed that her canine teeth were longer than they ought to be, almost fang-like. All this seemed familiar somehow...she glanced in the back seat of her car, and it all clicked. There was a volume of Urusei Yatsura she'd picked up at the comic shop (well, the English translation, anyway,) clearly skimmed through. That was it. Whoever had done this had read through the manga she'd bought and decided to change her into a character from it. She wasn't actually Lum the alien princess, but she was clearly an Oni girl like her, right down to the tiger-skin swimsuit she'd been dressed in.
Steven stood there, unsure what to do or even what to think. All sorts of confusing thoughts raced through her head. After what seemed like an eternity of stunned confusion, she decided that the first thing to do was figure out the full extent of the changes, followed by getting home safely. She took a tentative hop off the ground, wondering how closely her captors had modelled her new form after the Oni of Urusei Yatsura.
She didn't return to the ground after leaving it. So she could fly, like in the manga. She stopped trying to stay aloft and dropped back onto her feet. Given this, she tried the other ability she could remember - yes, she could emit electrical energy as well.
She was, it seemed, fully and completely an Oni, not just cosmetically. Well, the ablities were useful, at any rate. As to getting home, she knew she could simply fly home, but she'd rather take the car, especially since it would be hard enough to deal with her parents as it was. She knew she'd taken the keys out of the ignition as she left the vehicle, but she didn't have any pockets to search now. Nervously, she reached a hand into her bra. Yes, nestled in between her breasts were the car keys, as well as her wallet. She wondered why she hadn't noticed them in the first place, but figured that she was too preoccupied with the changes. She opened the wallet. Everything was there, but whoever or whatever had done this to her had, for the sake of completion, altered her driver's license photo to reflect her new form. None of the other information was changed, though - even the "sex" indicator was untouched. Apparently, they could completely alter her body, but they couldn't read English.
Sighing and shaking her head, Steven sat down in the driver's seat and turned the key. Thankfully, the car started as if nothing had ever happened. She pulled back onto the road and headed home, wondering what her parents would think - if she could even convince them that she was their son.