#miyahinafour #nsfw, a/b/o, post timeskip

Omegas Natsu and Atsumu get knocked up at the same time - since they share heats and ruts with both Osamu and Shouyou it's not clear who actually sired whose pups.

Which. They're all together in one big messy love nest anyhow, literally
and figuratively speaking, so it's not any consequence in the big scheme of things. Their pups will be perfect and they'll have more than enough love from all four parents to keep them safe and thriving and happy.

Osamu and Shouyou see it this way, but their alphas??

HA.
Their alphas go /nuts/ with the need to claim and protect their mates, and even though they're technically mated to each other, the alphas suddenly view every other alpha as an enemy to be chased off the property and barred for eternity.

Osamu has the size advantage, but
no one's stupid enough to underestimate Shouyou in a fight, wily, cunning, and part gremlin when he needs to be.

Atsumu and Natsu, waddling with pregnant bellies, have had enough of the pitiful territory battles and histrionics and decide to kick /both/ alphas out of their nest.
Who needs an alpha anyway when they can cuddle up together for naps and rub each other's sore backs and feet, finding comfort from the surging hormones through cockwarming, Atsumu sheathed tight in Natsu.

Osamu and Shouyou can whine outside their bedroom all they want. Begging.
Atsumu and Natsu deserve far better and that's what they find in each other, an inexplicable new layer to their bond.

Sometimes the cockwarming turns to a slow, pleasant rocking, nothing too strenuous considering how far along they are, just languid rolls of the hips that bring
on the softest orgasms, gentle as a sigh.

Other times it's the emotional connection and intimacy of cockwarming that they need most. No movement is needed, save for the tender caress of linked fingertips or the brush of a kiss to the forehead, cheek, or clavicle.
Let the alphas rage their wars.

World peace has always been in the hands of the omegas.
At least, until the pups are born - four of them, doubling their household's number and turning every aspect of their lives into utter /chaos/.

The situation demands a temporary truce and perfect union of parental wills and survival instincts to make it through.
And because above all else, what Osamu, Atsumu, Shouyou and Natsu share is the purest love for each other and their "little" family - they find a way.

💖
Omake - all the pups have the signature Miya eyebrows and signature Hinata haircolor, a combination which apparently produces /doubly/ dramatic personalities.

Times /four/.

Hahahahahaha.

😂
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More from @murcielagoAO3

Apr 30
#nsfw cw incest, a/b/o, miyacest, underage, osaatsu

Overse where it's expected and preferred for teen siblings or cousins to take care of each other's physical needs in puberty when their secondary genders present.

Heat/rut in adults can be managed by medication or one's mate,
but prescribing medication to growing youths is considered inhumane, as would attempting to take a mate before the right emotional maturity has been reached, which usually isn't until the early 20s where dating and finding a happy, healthy love bond with a mate is appropriate.
Teenagers just aren't equipped to handle what it means to be someone's life partner, and lack the skills to find and recognize their match. Puberty hormones are part of it, making teens irrational and needy when taken over by their heat/rut, which has no predictable schedule.
Read 36 tweets
Dec 12, 2021
#miyacest star//trek AU mild nsfw, switches

Captain Atsumu and First Officer Osamu command a Federation science vessel on expedition through an unexplored quadrant of space.

After surveying the surface of an alien planet, a transporter malfunction creates a duplicate of Osamu.
There's a time delay before the second Osamu appears, so it's not clear to anyone what's happened at first. Osamu seems tired and a bit disoriented, which is understandable after all the away trips to the surface, so Atsumu doesn't suspect anything right away.
They have separate quarters but an adjoining door, since they're brothers and all. Atsumu checks on Osamu that night when his shift on the bridge is over, thinking he'll get him some pudding and tuck him in. Osamu's worked so hard down on the planet and he deserves some rest.
Read 43 tweets
Nov 28, 2021
#miyacest #nsfw fraternal #twincest brainrot 💖
cw: oral sex, piv sex, underage (middle to hs miyas), she/he pronouns so you can imagine whoever you want ✨

(god, fraternal miyacest is just so good??? like you get all the goodness of twincest but then also size difference??)
girls mature faster so she's taller by 5th grade and fills out first, by 7th grade her boobs are envied by all the other girls along with her curving hips and strong legs from volleyball. he's still not much to look at yet, all gangly, but he sure likes what he sees, and she
thrives on the pleading, pining looks he sends her way day and night. she turns him into her pussy hound, gets him under her skirts licking her wet slit whenever she wants because he's thrilled just getting glimpses of her bra, so of course he's going to do anything she wants.
Read 61 tweets
Oct 5, 2021
#nsfw #miyacest #miyahinafour
cw: birthdays, distance, substitutes, switching, underage (Natsu)

Shouyou and Natsu know to give the twins private time together on their birthday. It's their special tradition, after all.
But this year, for the first time since they were born, they won't be in the same location to celebrate their birthday and the effect this has on both twins is unexpectedly dramatic.

Shouyou tries to appease them. "It's just a day on the calendar. Why not wait until Osamu's back
from his business trip? Postpone for a bit?"

The twins know what Shouyou's saying makes sense. But Shouyou's logic - how he's had to delay a lot of things going back and forth from Brazil so it's normal for him - doesn't quite work on the two of them, who have shared a womb.
Read 57 tweets
Sep 13, 2021
#nsfw #miyacest cw: masturbation, tentacle dildo, anal sex

Atsumu half-jokingly mentions one night that it might be fun to have a monster dildo like a tentacle or something to play around with sometimes.
Osamu knows full well that behind the joke, there's a real desire for kink exploration, and damn if he's not into it too.

He finds the most massive tentacle dildo on the web, and orders a custom one with a deep grey base like an octopus, and a pink fleshy color for the S-curved
and knobby insertible end with faux suckers that get smaller at the tip.

It's monstrous all right. /Obscene./ And oh, the thrill of presenting it in a box to Atsumu, watching him unwrap it and then--eyes bulging--turning bright crimson and stuttering, nervous to even pick it up.
Read 27 tweets
Aug 31, 2021
#nsfw #kageyamacest #miwa #tobio #incest

Miwa's the only one Tobio allows to cut his hair.
Or rather, Tobio's not allowed to enter anyone else's salon, or sit in anyone else's chair but Miwa's.

He goes to her whenever he needs a trim, texts her to set up an appointment right after closing time and she evens out his bangs, takes the length off his neck. Easy peasy.
But that comes after he strips naked and she fastens the slick black smock around his regal neck, sitting him down in the chair by her shampooing sink.

The smock covers his arms, chest, and lap. She tilts his head back into the sink, checking the water temperature on her wrist.
Read 25 tweets

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