The effects were immediate: His skin turned pale white as if he was made from marble and he felt ticklish as his body hair fell out. A strange sensation came over his eyes and they changed color, turning blood red. Then he saw everything around him shot up, or rather, he shrunk down, his clothes becoming more loose on his frame. The he felt something happening to his dick. It became smaller and smaller until it disappeared into his skin. Instead a hole opened up between his legs and began to enlarge. His balls also shrank away and moved inside completely.
Whe he looked back at his face he did not see the face he knew anymore but instead a tween girl's face appeared, sporting a cute little nose, big red eyes, smooth reds lips, fangs showing, and loose white hair. kicking off his clothing, he revealed his body. There was no muscle whatsoever, just a petite body without any fat whatsoever. Flat as pancakes, firm ass, thin waist, skinny arms, long slender fingers... Everything about him screamed 'teenage girl'. And most importantly, he had tiny pussy lips, barely visible.
Paul looked at himself in the mirror and smiled. He, but he now sounds wrong, she looked like the ideal vampire loli! Looking at herslef made her horny! She started touching herself and moaning softly. Her hand reached under her skirt and found her small clit, rubbing it slowly. She could feel her juices flowing freely, coating her legs. Her other hand reached for her tiny nipples, pinching them hard, making them turn pinker than ever before.
She moaned louder, feeling hot waves of pleasure run trough her body. She was so wet already! Just thinking about being a teenage girl got her hornier than hell! Her fingers worked faster and faster, her cunt was dripping with her own juices now. Soon enough she exploded in orgasmic bliss, letting out a girly scream while shaking violently. Her cunt convulsed and sprayed juice everywhere, soaking the mirror.
When she calmed down a bit she realized how much fun she had just had. With her new body, she would be able to enjoy sex even better!
"Oh boy I'm gonna go wild this body!" she giggled. "But first things first, let me get dressed properly..."
And with that, she jumped onto her bed, pulled open the drawer and grabbed a sexy schoolgirl cosplay uniform, just for a ocassion like this. A sailor fuku top and short plaid skirt. As well as a pair of shoes. She slipped it all on and checked herself out in the mirror. Damn, she looks sexy! Perfect to play with girls! Boys, not so much.
"Technically, that means that I change chanhed secuality as well as gender." Paul thought to herself. Paul... "I really need to change my name."
With that, she headed to her hobby room, wearing her new outfit and thinking about what to name herself. "What would be a good name for a young vampire?" she pondered. "Carmilla? No way. She was an lesbian vampire, yes, but she wasn't exactly young. Mary? Like Bloody Mary? That might work." After a few minutes of deep thought, she decided to use Mary. It sounded nice and innocent, like she wanted. Plus it was easy to remember.
After that she went outside. It was dark out there, for a human, anyway. The vampire however, had nightvision, seeing almost perfectly fine in the darkness. So she walked along the streets, looking for people to drink from, to fuck, or both.