you are a lone human from small coastal village of humans. what made you unique is that you were of the few humans allowed to go out of the village to hunt for food. other then that you were a pretty average human you had C cup breasts (nowhere near as big as the breasts you had seen on some cowgirls) a decent pussy and an above average 1 and half foot long cock (the average length for humans is around 1 foot)
*****
you had heard rumours of a rogue group of monster girls which didnt care what you were as long as you werent a human. people said they were more dangerous then normal monster girls due to the fact normal monster girls will keep you in their homes and feed you while still making you sex slave but these monster girls would fuck you senseless and then leave you in the wasteland to either die or get taken by other monster girls.
you never really believed these rumours
until today
*****
you were wandering the wastelands trying to find any easy prey but like usual there was nothing although you did manage to find a patch of berrys which you foraged and out in your pack. thatbwas when you heard it
the sounds of monster girls. AND THEY SOUNDED LIKE THEY WERE REALLY CLOSE. you turn around to start running but then bump into the legs of an arachnid.
"oh well what have we here" says the archnid
"a nice little plaything for us to have sex with" responds a cowgirl standing beside her
"well then lets get started" says a lamia
in an instant the lamia flicks her tail so fast that its cuts the fabric of every piece of clothing you were wearing
the lamia then puts her pussy ontop of your cock and starts fucking you. this already felt amazing and then you feel something inside your pussy as you see the lamia sticking the tip of her 10 foot tail inside your pussy
this causes you to moan in ecstasy as you cum for the first time
you the feel your hands being sucked up by something and see a harpy a harpy fucking your left arm and a catgirl fucking your right
then you feel something entering you ass and realize its probably the arachnid using her abdomen to pump her silk directly inside you which you have heard is something arachnids do to humans quite often
and finally you see a cowgirl lifting her huge breasts to your face and sticking her nipples in your mouth. little did you or any other humans know but a cowgirls breast milk acts as an aphrodisiac to humans causing them to cum endlessly and lose all thoughts except for sex until they digest the breast milk which usually takes about 12 hours or so.
after feeding you about a gallon of her breast milk the cowgirl puts her pussy on your face and you immediately start licking her pussy
a few minutes later you cum and lose consciousness
the monster girls kept fucking you until you had cummed at least 25 times in each of thier pussys
as one final sexual act the arachnid ties silk around your cock using a type of silk that disintegrates after 24 hours which will prevent you from cumming at all
*****
you wake up about 23 hours later the aphrodisiac of the cowgirl has well since worn off but due to the arachnids webs you are unable to cum even though you have 18 hours worth of cum ready to be released due to the cowgirls milk.
you stick your cock into your pussy (most humans do this because they find it uncomfortable to have a foot long cock swinging around during everyday life) and start aimlessly wandering around trying to figure out where you are but still not thinking clearly due to the amount of cum that is built up
you then feel the webbing around your cock disintegrate and instantly fall to your knees in pleasure as you cum and estimated 300 gallons into your pussy in the span of 10 minutes. about 15 minutes you get back up worried about how much you cummed inside yourself before remembering that it's impossible for a human to get themselves pregnant with their own cum. you stomach was still bloated but you knew you would be fine in a couple hours as you around 5 gallons of your cum spill out of your pussy every minute.
you keep walking around and with you head finally clear you realize exactly where you are
your in the city where the first bomb was dropped. the one that caused so much radiation it ended the world, transformed people into monster girls, and turned the world into a barren apocalyptic wasteland. or at least thats what the elders at your village always told you about the city in the distance. but you knew one thing. this place was FULL of radiation, and you knew what this radiation did to humans.
this radiation only affected humans have had sex with a monster girl in the last 48 hours (which you have, all 5 types in fact) and turns them into that type of monster excpet with a penis. these monster girls with cocks are incredibly rare as all humans strictly forbid entrance into the radioactive cities in your entire 6 year history kf hunting in the wastelands you had only seen one monster girl with a cock
AND NOW YOU WERE ABOUT TO BECOME ONE