Prologue
It's night outside and the street is quiet, all lights are out, the wind blows on the few remaining leaves of the solitary tree at the end of the road. the scenario would look the epitome of peace if it was not for one thing, most of the houses are empty, the fridges with food left to go bad and their owners all missing.
Things started to go downhill maybe 5 years ago when the coalition came forward, exposing the different kinds of unnatural beings existing in the world and how they were living their lives among us without notice until then.
First, nobody believed them, "It's just a bunch of nonsense, non-humans, pff", but once they got their specimens out of the barracks and started showing them to the public, more and more people came to believe in them. But not just believe there were others among us, believe that they were a risk, would hurt us, kill us in our sleep. They should obviously be malign beings, why else would they be living in secret? Passing themselves as humans? Luring us into believing them our equals? In short, all things got south to the minorities, like it always goes. History repeating itself and all that.
The government got to create concentration centers where they would send the non-humans inhabitants of the earth, to "better understand" their capabilities and maintain them until they were discovered non-harmful to our standard citizen. The problem? If they lived all their lives among us, how would we get the right ones to the centers? Neighbors started to call the police and say things such as "I think Ms. Smith, the old lady at the yellow house, is a non-human", "I think little Thomas of the end of the street isn't right, the kiddo go to the woods and stay there all the day, every day, that can't be normal". They weren't always right, but they weren't always wrong too, and so we started losing our neighborhood, family after family, some left in the middle of the night with the fear of being discovered but more were brought to the centers by police enforcers every day.
My family got lucky, our kind doesn't have a lot of perks to be noticed and since we moved here after my little brother was born nobody got to see the missing signals of a human pregnancy or the way my dad would get round in the stomach before the egg was laid in the nest we still kept in the basement for the day my brother and I will find our mates.
You see, the problem with our family is that while we live most of our lives as humans, we are born in the shells, the shells are developed inside our dad, and our mother will fertilize them once the shell gets out. I call the shells eggs.
Once a shell is hatched we must wait a month before the hatchling starts to look like a newborn human. Before that, it's all a mess, our nails are like claws, our skin has plumage covering all of our body and our eyes, still developing, don't resemble too much with human eyes, the form is just wrong, the color too bright.
And I'm scared shitless with what will happen since I'm sixteen and in four weeks should start with the symptoms of a breeding-age male without a mate. It wouldn't be so bad if we at least knew someone in the vicinity that was like us. The way things are right now, I will start the heat without a female of the species, my feromones then will go crazy, and without a female of our kind, my smell may attract human males.
If a male of our species didn't find a female to mark him and fertilize his shells after they are expelled, before this mess he had two options: he could go to a remote area with other males of the species and wait until the heat pass (the shell is put out once it happens and can be carefully stocked up until three years after and be viable to receive the female fertilization without any risks to the male) or in extreme cases when this option is not available the male stays with the human population it will cause the feromones to attract human males.
Once in heat and with a human male attracted to him, should they have s*x, the human sperm will be deposited at a little canal in one of the walls of the rectal cavity. A human prostate stays in the same region that our shell-producer organ and when we are out of the mating heat looks quite similar to it.
A human fertilized shell will go out quicker than an unfertilized and be a little bigger, the hybrid will sometimes look quite human and need help coming out of the shell, but most will just need less time to become like a normal human baby should be.
The problem with the second option that if I show up with my 6'4" self looking all human-teen-boy with a baby on the arms at a guy's house after that and say "Hi, this is our son Micha", he will think I am crazy and look out for the hospital of which I may have stolen the baby. Or, worse yet, will call the cops and say that the non-human freak forced him to have s*x and now produced a baby.
Since we don't want to go by with the second option and even if I didn't show up at the guy house just the fact that I would become a dad without a girl involved would make all our neighbors still here suspicious of us and one of them would certainly call the cops to our freak-selfs.
Dad is freaking out, creating the perfect hideout to me in the basement while calling Mom all names by getting the shells impregnated with two boys. Had she got girls, all that would happen would be them going out to look out for their mates in the 18th birthdate, but noo, she had to have boys, wanted to pass down the rare genes, got to see our future hatchlings and be sure they were her grandbabies.
Sometime after all the rumbling stopped in the basement I finally got to sleep, still worried if our plan will go right, still fearing never getting my shells fertilized, never holding a hatchling and knowing I did it.