One evening not far from Patterson University it was a clear cool night. There was a few inches of snow on the ground. It was quiet and peaceful as the land near the school was mostly forest.
The silence was broken as something bright began to fall from the sky smashing in to the ground with a loud bang that was heard for miles however nobody payed much attention to it. A fire crater was left in the middle of a small field with a few small patches of fire around it which melted some of the snow.
A shattered rock laid in pieces in the crater. Everything seemed still until something began to leak out of them. This creature had been frozen in the vacuum of space for many hundreds of years but the fire from the collision finally warmed it enough for it to start flowing together in to a mass of what looked like black blob of tar that began to crawl out of the crater. It touched some snow and pulled away in pain. It new it had to find a warm host soon.
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Less then a mile away Anna was in her dorm room with her boyfriend Chris. Anna was an attractive brunette and her and Chris had been together for a few months. They were waiting to have sex until they were both ready which was starting to get hard on Chris but he knew she was worth the wait.
They were in her bed making out. Chris ran his hand up under her shirt to which she grabbed him by the wrist pulling it back out."Now Chris we talked about this, if you want it that badly you have to be willing to wait for it."
"Yeah i remember, its just........ you are so f'n beautiful Anna, hard to keep my hands off you!"
She smiled and gave him another kiss before saying "that's sweet, but don't worry, it'll be worth the wait!"
"Ok, well time for bed i guess, see you tomorrow?"
"Of course! Night babe!" She said as he got up and headed for the door.
Anna took off her jeans and her bra getting ready for bed. She played with her phone for a little while before she turned off the light and went to sleep.
Outside her window which was open a little to let a cool breeze in to help her sleep was a small black blob wiggling around in the snow looking for warmth. It started to crawl up the wall and force its way through the screen and plop on the bedroom floor. It then crawled around until it heard Anna make a slight cough in her bed and it froze and flattened against the floor to hide. It soon realized it needed to find a place to camouflage itself somewhere where it could stay hidden while at the same time preparing a suitable host for itself. It could feel Anna's warmth and decided to crawl up the bed and investigate.
As it slithered it way up it moved under the covers getting closer to her leg feeling her body heat. To further up it went the warmer it got so it moved closer to the source until it found a thin piece of cloth around her crotch. It didn't take long for it to reach out and begin to bond with her underwear taking over the whole piece and mimicking the fabric in order to stay warm and begin its work on her.
Anna stayed asleep and was completely unaware of the alien creature that had bonded with her panties and was even starting to make changes to her as well.