Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/8618224.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Haikyuu!!
  Relationship:
      Azumane_Asahi/Nishinoya_Yuu
  Character:
      Azumane_Asahi, Nishinoya_Yuu
  Additional Tags:
      Mating, Mating_Bond, Mating_Bites, Mating_Rituals, Fluff, Fluff_and_Smut,
      Knotting, Omega_Verse, Alpha/Omega
  Series:
      Part 13 of Mating_Night
  Stats:
      Published: 2016-11-21 Words: 1784
****** Nishinoya & Asahi ******
by Bittodeath
Summary
     There is an old tradition in the lost villages of Haikyuu, to make
     sure there are no unmated young people: once every three years, at
     night, all the youth between sixteen and eighteen are gathered at the
     entry of the village, Omegas and Alphas alike. They presented as
     either Alpha or Omega and, under the watch of the leaders of the
     village, Omegas are sent into the forest, to run and hide themselves.
     A moment later, Alphas are sent after them. The first Omega an Alpha
     manages to grab is destined to become his mate, and they have to mark
     each other during the night and come back to the village once mated.
Notes
     HELLO IT'S ME. Yes I'm finally back from the dead and I finished this
     one today.
See the end of the work for more notes
There is an old tradition in the lost villages of Haikyuu, to make sure there
are no unmated young people: once every three years, at night, all the youth
between sixteen and eighteen are gathered at the entry of the village, Omegas
and Alphas alike. They presented as either Alpha or Omega and, under the watch
of the leaders of the village, Omegas are sent into the forest, to run and hide
themselves. A moment later, Alphas are sent after them. The first Omega an
Alpha manages to grab is destined to become his mate, and they have to mark
each other during the night and come back to the village once mated.
This technique is not perfect, but everyone is mated and since their other
senses are hindered, most Alphas rely on their sense of smell and end up
choosing the “best smelling” partner, who is biologically the most compatible.
Thus, blood lines are strong – and no one can complain that they were chosen or
rejected. “Mating Nights” are joyous occasions, often followed by a consequent
number of births.
 
Karasuno Village is a particularly remoted village, with only two women but
luckily just an even number of young Alphas and Omegas. And the “mating night”
as finally arrived, under the supervision of their leaders, Ukai and Takeda –
or, as they are called now that they are mated, Keishin and Ittetsu. They have
gathered all their young ones, eager, bored, excited or frightened.
“It is night. You may go.”
 
Asahi was chewing on his lips nervously. He didn’t really know what to do for
Mating Night – well he had the theory, but reality was different. He was
worried no Alpha would want an Omega like him, tall and brawny, looking much
more like an Alpha than an Omega. No matter what Terushima said, he felt like
something would go wrong. Maybe he’d fall and break one of his bones, or his
Alpha would never find him, or worse, neverwant him. What was he going to do if
his Alpha refused to claim him? He couldn’t help but wring his hands nervously.
“You should calm down”, Aone said, it was probably the first time he actually
heard the Omega talk. “Everything will be fine”, he added before taking the cue
and starting to run into the forest.
Asahi looked around himself: all Omegas were starting to run into the forest,
climbing, hiding, fleeing. He started to run as well, quickly stopping however.
Running like that made no sense, his Alpha would have to find him by scent. He
analysed the place and paused on leaves, gathered thickly under a tree. Yes,
that was an idea. Maybe not the best he had, but an idea nonetheless. He let
himself fall into the hump of leaves, gathering them over his body and, he
hoped, totally hiding himself.
He startled when he heard Keishin’s cue, quickly followed by the howls, shouts
and cries of a bunch of running Alphas. The ground trembled under him as they
stomped inside the forest, making him shiver as he smelled several Alphas
running past him. And then everything was calm.
“Asahi?” a voice called, and this time he nearly had a heart attack. “Asahi I
can smell you but… where the fuck are you?”
Asahi’s breath shook when he recognized the voice and slowly sat up.
“Here, Nishinoya”, he answered, softly rubbing against his scent glands to
guide the Alpha to him in the dark.
He heard the soft sound of Nishinoya’s steps in the forest, and the scratch of
someone lighting a match. Nishinoya was standing right in front of him… and
looking up. Of course, he hadn’t thought he’d find an Omega sitting on the
ground, especially someone as tall as Asahi.
“Down, Noya”, Asahi softly said, and the Alpha finally looked down.
“What… what are you doing, sitting on the ground like that?”
“I… I don’t really know. I thought hiding under leaves was a good idea.”
The small Alpha laughed, holding out his hand.
“You big dummy”, he said, “you could have just waited, you know? I would have
found you anyway.”
Cogs seemed to run and click in Asahi’s mind as he slowly stood up.
“Do you mean… you are…”
“I’m your Alpha, of course”, Nishinoya grinned. “Who else could it be?” He
looked at his Omega, his grin fading to an expression of panic. “Oh no no no,
don’t cry, please Asahi don’t you know I’m no good with tears!”
“I’m not crying”, the Omega replied through his obvious tears. “I’m just really
happy.”
“There’s no need to cry if you’re happy!” the Alpha almost screeched, grabbing
Asahi’s hands and holding them tightly.
“I’m not crying!”
The scene was so ridiculous that Nishinoya ended up bursting into laughter,
squeezing Asahi – or rather, his mid-section – tightly. The Omega suddenly
stilled, his gaze falling on the small Alpha hugging him.
“I… I thought no Alpha would want an Omega like me”, Asahi said, slouching.
Nishinoya grabbed his face and pulled him close.
“Other Alphas are idiots if they don’t want you, Asahi”, he said firmly. “Now I
believe you accept me as your mate?”
Asahi blushed and nodded, unable to look away from Nishinoya’s big, shiny eyes.
The young Alpha chuckled and pecked his lips, taking his hand into his. “I’m so
lucky to have you”, Nishinoya murmured. “You don’t even know how happy I am to
have found you.”
“Probably less than me”, Asahi replied in the same voice.
“Idiot”, Nishinoya said, gently tapping his head. “We should head to a nest”,
he added, pulling on his hand.
They walked for a little while, passing by several nests that were already
hosting a couple. Nests were cocoon-like giant constructions, made of branches
and hanging from the trees, filled with wool, leaves and feathers. There were
also one or two blankets inside, making the whole as comfortable as possible.
They finally found one unoccupied, and Asahi climbed in first, before pulling
Nishinoya in. The Alpha grabbed the small wooden cage filled with fireflies
supposed to enlighten them, but he stopped as Asahi’s hand covered his own.
“Could you… not?”
“You want to stay in the dark?”
“I’d rather, yes”, Asahi admitted. “This is embarrassing.”
The Alpha sniffed the air and tilted his head.
“Are you worried?” As Asahi didn’t answer, he concluded: “You are. Now can you
trust me on this? Everything will be alright, there is nothing to be afraid of.
Do I look that scary?”
Asahi chuckled, peering into the darkness where he could make out Nishinoya’s
pale form.
“You are very dependable, Nishinoya.”
“Then trust me”, the Alpha pressed, crawling closer and settling in Asahi’s
lap. “Trust me”, he repeated, lips hovering over his, before closing in for a
kiss.
He was gentle, even in the grip on his small hands over Asahi’s shoulders, even
in the licks of his tongue into his mate’s mouth, slowly coaxing him into
relaxing, lips open on a pant.
“Asahi”, he whispered, his voice a bit hoarser now, “I love you, Asahi. Always
have.”
“Nishinoya”, the Omega answered, fingers tightening on his waist.
“Yuu…” he breathed, “call me Yuu, Asahi.”
“Yuu”, Asahi murmured, feeling the Alpha shiver against him, “I’m not afraid
anymore.”
“Good”, Nishinoya rasped, “because I don’t know how much longer I can hold on.”
His hands were particularly warm against Asahi’s skin, sliding under his shirt
and pulling it above his head, exploring his torso and his strong back,
brushing against his arms and tightening on his fingers. His breathing was
strangely calm, in the comforting and secure embrace of his future Alpha. He
just had to follow Nishinoya’s guidance, laying on his back while the Alpha
took off his own clothes, radiating warmth.
“You are so warm”, Asahi wondered, and Nishinoya hummed, pulling off his pants.
“You’ve always been feeling cold”, he simply said, making him smile. He was
leaving fire trails in the wake of his fingers on Asahi’s thighs, his breathing
a bit laboured though he still seemed in control.
“It feels good”, the Omega admitted, clenching and unclenching his fingers on
the feathers.
Nishinoya’s warm touch left his skin to touch his hair, pulling on the elastic
holding it in a tight bun until it snapped. The long, silky brown hair fell on
his shoulders, Nishinoya’s fingers immediately threading through it. The Alpha
gently pulled him in for a kiss, distracting him with playful bites and sensual
licks against his lips, while he guided himself in, entering his mate in one
thrust. The Omega moaned, his fingers tightening in a bruising grip on his
frail shoulders, while Nishinoya stabilized himself on Asahi’s hips, breathing
deeply to keep his control.
“See”, he said, “I got you so relaxed it went in easily. It didn’t hurt, did
it?”
“Yuu”, Asahi called, his voice merely a gasp, “Yuu you’re so warm, you feel so
good inside of me.”
“I know babe, I know”, the Alpha answered, thumbs rubbing circles on his hips.
“Are you okay? Can I move?”
“Please.”
His thrusts were slow and languorous at first, enjoying the moment and giving
Asahi time to get used to his girth; but he found a rhythm that made him clench
deliciously around him, a bit faster, a bit rougher, though his hands were
still holding him very gently. He jolted when Asahi cried out, thighs closing
around him and pulling him closer.
“Asahi?”
“There, Yuu, there”, the Omega moaned, now accompanying his hips with each
movement.
He nodded, though Asahi probably couldn’t see him, and started to angle his
thrusts to give him what he wanted. The sensations quickly became too much and
he thrusted in one last time, his knot swelling and sealing their embrace as he
savagely bit down on Asahi’s throat, until he drew blood. Asahi sagged under
him with his own release, gasping and panting, bending into a complicated
position to bite at his throat and seal their bond. A rush of pleasure coursed
through his veins, his pupils flaring, his arms tightening around Asahi.
Once they had regained their breath, he pecked his mate’s lips, pulling out as
soon as he could and wrapping his small body around Asahi’s back. He was so
much smaller that to anyone else it would have seemed ridiculous, but he knew
his warmth not only soothed his Omega, but warmed him up and made him feel
safe.
“I love you too, Yuu”, Asahi finally murmured, squeezing his fingers.
Nishinoya smiled, and soon after they were both sleeping soundly. Because
Nature had made them exactly for each other, he had never been afraid of the
future. It was Nature’s grand design, after all, wasn’t it?
End Notes
     I hope you liked it! As usual don't hesitate to comment either here
     or on my tumblr, bittodeath.tumblr.com!
     Next part (TanaEnno) is half done, which lives only the extra chapter
     KenKyouHaba before the "Two Years Later" recap! (W/ lots of fluff of
     course. And dorky things.)
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