Cw: Minors Dni. Smut. First Time Sex. Literal Breeding. Sci-fi Themed. Female Body Parts For Reader.

cw: minors dni. smut. first time sex. literal breeding. sci-fi themed. female body parts for reader. izuku is bigger than reader. size kink if you squint.

The dynamics of the world as you knew it thousands of years ago are now gone, and ever since you awoke from cryogenic slumber just 24 hours ago, the next phase of humanity’s plan to continue to exist and expand through the stars is now in progress.

Repopulation.

The new Earth substitute you inhabit is practically devoid of humans and will need bodies, at least until enough of you can build robots to replace your physical labor. There are fifty of you in total, of reproductive age and of peak physical, intellectual and emotional ability (aggregate, with some compartments allowed to be lower than others), and you are assigned to partners based on your compatibility.

They call you terraforming partners. It’s a euphemism for mate. Your only job is to breed.

There are of course other departments to work in the colonizing efforts. Some of the selected fifty have double appointments in the repopulation department and in research and development, others in art and communications, still others in nutrition. You failed to select a secondary appointment prior to your assignment to this planet, and thus have the appointment of Propagator-09A.

It is time to meet your mate. Taking in a deep breath, you leave your quarters, housed in one of two L-shaped buildings surrounding the Nexus or central headquarters, and walk straight down the hall of the dorm building into the designated repopulation centers. These are where you will perform your duties.

The two of you will enter a dome-shaped building from opposite ends of the room. You’re not sure who awaits you on the opposite end of the door, just that they are sexually compatible with you, and pass other measures of compatibility based on a predetermined algorithm. This algorithm is not meant for love, not meant for marriage, just sex and reproduction. Will you two produce at least two minimum viable human children that can be turned over to the administration to be raised? That’s all that is asked of you, and that is what you are contracted to do -

... regardless of who will show up in the next few minutes.

The watch on your wrist monitors your heart rate and everything other than it, and it is starting to beep in concern of your rising heart rate. You suck air into your lungs and let it blow out of your nose. 

Mates are not allowed to hurt you. They are to watch for your comfort, as you are to watch for theirs, they are to stop if you’re not ready, and you are allowed to leave at any time. They are meant to fit you perfectly, and you were specific enough in your application to explain how you liked to be held and pleased.

This will be okay, you tell yourself. It will all be okay.

The door slides upwards into the apex of the dome, and you step into your new home away from home, at presumably the same time as your mate. Marching straight into the center of the room, your eyes lowered to the ground to steady yourself, you don’t notice that the man on the opposite end has not yet begun to move, and when you look up finally once you’ve reached the center, you see him for the very first time, and his cheeks are tinted with the deepest of blushes.

The young man’s lips are parted wide, his hands balled into loose fists at his side as if he didn’t know what to do with them. Immediately, you recognize him from the debriefing session just prior to the cryogenic freezing and the young man - tall, handsome, far too talkative with a voice gentler than expected for a man of his stature but in keeping with his softened but still masculine facial features - seems to hang in the frame of the door, transfixed. Not one word comes out of his mouth. You notice the top of his head, covered in mossy green curls, just barely grazes the top of the door, remembering that the domes have much lower ceilings than the buildings back home.

“Hi,” you eke out, then quickly add, “watch your head.”

Your voice is smaller than usual as you offer him a slightly nervous, strained smile, and he looks as though a shock runs through his body as you speak to him, bumping his head anyway as he walks in despite your warning. You raise your eyebrows, and he laughs just as nervously before meeting up to you.

Standing just inches apart, he scratches his neck, and the pink beneath his freckles still hasn’t abated, but at least now he can talk.

“Sorry about that haha, I’m… I just didn’t realize you’d be so pretty.”

Your own face deeply warms at those words. He’s easy on the eyes too, and you’re thankful for it, but he doesn’t need to charm you as easily as he does. 

Shy yourself, you’re at a loss for words to reply, even thank you failing to be generated. He notices the silence, and quickly fills in the space.

“I’m Izuku. Izuku Midoriya… uh, your terraforming partner. Nice to meet you.”

His hand stretches out to shake yours, and you shake it. It’s larger, warm, and heavily calloused. You wonder what type of work he does, before the mission or now that he’s on this planet with you. With those broad shoulders and impressive biceps of his, you figure it could be something manual, but he’s always sounded quite intelligent so perhaps the muscles are more for show.

“Nice to meet you too. I’m ___.”

As if on cue, once you’ve introduced yourselves, the doors slide down behind the both of you, closing you in. There’s a loud click, and then the pod announces that it’s moving underground, and you steady yourself as gravity shifts. Your partner’s hands extend reflexively to hold you to prevent you from falling, but he’s careful not to touch you unless the motion is invited.

The pod settles onto solid ground again.

The space isn’t small, but it’s not large either, and while it’s mostly monotone, a smattering of whites and beiges and glass, many of the surfaces are soft and plush. A large, round bed with many pillows, a glass panel that doubles both as a window and a screen is across from it. When you try the window, you realize your pod hasn’t moved completely underground, and you can still see the suns’ rays in the afternoon. You’d heard that the pods are set up this way for insulation. For heat, and for… sound.

You look towards Izuku again. His back is turned from you and he’s looking around the pod as well, examining every corner and crevice, his fingers rubbing his chin as he thinks. He’s a caricature of a thoughtful person, you think, soon distracted by the way his shirt hangs over the muscles of his back. He stretches for a moment, and you see the muscles flex under the thin fabric. Something stirs in your chest, then you look away quickly, deciding to search through the closets.

These algorithms hit the nail on the head when it comes to your type, you hate to admit.

Poring through the closets and drawers reveals all manners of lingerie and loungewear, as well as a few very specific costumes that seem to be for roleplay. Your face warms as you see a set of angel wings, and a bunny leotard, then you glance at him, wondering if these are the types of things he’s into. When you see the gladiator suit hung neatly right next to it, you can feel your blood run cold. 

Yes, it’s what you’re into.

There’s a fridge in the center of the room with protein drinks, meal replacement shakes, fresh fruit, wine, chocolate and other sweets, as well as a call button for meals. Cutlery and dishes find themselves in another drawer, along with a small table spread and two chairs that appear at the click of a button in the wall. A makeshift fireplace. 

Anything to set the mood.

Pornography in abundance. Dirty comics. You and Izuku both stare in awe at the sheer collection of spank material, then look at each other, and can’t help but laugh.

They really prepared for everything.

By the time you’ve looked at everything, your stomachs are growling. You share a meal together in polite conversation, which turns into friendly banter, laughter, and then soon, back into pregnant silence as you realize the sun is setting, and you remember there not on a date, not to become friends but for a purpose. 

The ability to delay the inevitable is now being lost, and eventually you’re both acutely aware of the body that occupies the same space. Izuku looks up at you, clears the plate before him, and broaches the subject first.

“Have you ever-”

“Yes,” you lie.

“Oh.”

He looks down for a second, then looks up at you. You wonder if he’s disappointed, but soon he adds, “I’m sorry if I can’t meet up to expectations but I’m willing to learn how to make you feel good.”

Your stomach twists for a moment, but you offer a smile. He looks sincere, no waver in those bright, green eyes, and it warms you. The two of you clear away the dishes soon, and Izuku tells you he’ll be careful with your body, once clothing has been stripped away, and the two of you are bare and facing each other.

You don’t know what that will entail before he touches you, but the inevitable attraction you have towards him, the magnetic draw that he has to your body, informs you soon. Your lips meet, you on your tip-toes, and his arms reaching carefully around his waist. The first kiss is reticent, soft and anxious, the second is hungry, the third is greedy. His tongue tastes everything your mouth has to offer, yours fights to get its share as well. Your arms wrap around his shoulders, as your chest presses against his. Your hearts beat in time with each other. Thump, thump.

Izuku’s skin smells like spring water and freshly cut grass, and is soft and warm to the touch; his weight against yours is a comfort you’ve needed your whole life. His breath against your skin, soft kisses along your collarbone, between your breasts, over your lower belly, and finally culminating with his mouth laying over your clit makes your body buzz. He whispers something about reading that you cumming first will make you accept him better, but the way he eats you out hungrily makes you think that it’s less tactical and more for the pleasure of it. He’s good with his fingers, too, thick and deep in your crevices, gentle but purposeful. 

The act of copulation can be such a solemn, resolute affair, but for you two it’s a new dance, where your bodies open up to each other in concert. Your bodies press and join together, your mouths each swallowing the other’s gasps as he enters you, as you take all of him in. You feel like heaven, he feels like paradise; the ebb and flow between you is perfect, unending. The sun sets without your notice because all you can see is each other.

Unconquered territory is discovered inch by inch, from inside out. Izuku makes your toes curl, your heart skip several beats as you cry out his name, even if you’ve just learned it moments ago. It’s a job, but the pleasure seems almost sinfully indulgent.

And you’re both extremely hard workers by nature. 

Breathless by the time he’s filled you to the brim, you have to remind each other that you don’t have to be pregnant at this very moment. He pulls out of you reluctantly, and your body tries to hold onto him, but all good things must come to an end, even if temporarily.

“Are you okay?” he whispers over your knees. 

You’re better than okay, full of affection and hope, flooded in hormones. You nod, Izuku offers a kiss to both your kneecaps as he applies just enough pressure with a forearm to keep your folded position. Parts of his semen slips out of you and he asks you if he can, and when you nod, cheeks warm and breathing steady, pushes the slippery substance back into your body with two fingers. 

A timer goes off and he sighs, laying down beside you.

“Testing is at the end of the week,” he muses. He’s staring at the ceiling. You want to reach over to him, but it feels too intimate for a first meeting, even if he’s been in your guts, even if he’s planting himself forever into you.

“Yeah.”

“I think we can do it,” he adds. Your worn out body warms, wanting more already. 

It’s just a job, you remind yourself. It’s work, not play. Duty, not love.

“Me too.”

Izuku turns to look at you, and he’s so earnest and sweet, you can practically imagine you are lovers, instead of biologically matched mates, and that rather than this transient mission, you’ll be together for the rest of your lives.