Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/3977896.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Big_Hero_6_(2014)
  Relationship:
      Hiro_Hamada/Tadashi_Hamada
  Additional Tags:
      Alpha/Beta/Omega_Dynamics, Mating_Cycles/In_Heat, Unexpected_Results,
      Sappy, omega!Hiro, alpha!Tadashi, Humor
  Stats:
      Published: 2015-05-20 Chapters: 1/2 Words: 8068
****** When Things Get Heated ******
by Shelamnia
Summary
     Hiro is sick of heat suppressants, but he can't go through his heat
     alone safely. He decides to ask Tadashi - his alpha brother - to help
     him through his heat so that it'll be short, if unpleasant.
     It doesn't quite go as planned.
Notes
     Modeled after Eat,_Knot,_Love_(Teen_Wolf) by pandabomb.Same style,
     and same kind of A/B/O universe with a few changes of my own. Of
     course, the original is better and you should go read it!!
     Also, Big Hero 6 isn't mine.
     Now that credit has been given where credit is due…
See the end of the work for more notes
“Tadashi, please? I know it’s not unheard of.”
“Hiro, I’m not sure it’s what’s best for us.”
“Yea, well, you know what the heat suppressants do to me – they’d make my heat
last until well into fall quarter. Or you could just help me get through it in
a few days.”
Tadashi put down the book he was reading next to him on his bed. Hiro was
sitting at the foot of the bed, waiting for his brother to decline or accept.
With a sigh, Tadashi said, “There are other options.”
“Mm, like getting fucked by a total stranger for a few days.”
“Language.”
“Okay, sharing my first unsuppressed heat with a total stranger. Same thing.
It’s not like anything could go wrong, like they turn out to be an asshole and
mate compatible and I’m basically fucked and stuck.”
Tadashi sighed, looking at Hiro apprehensively. “Language. Have you tried
talking to our friends?”
“Yea, turns out they’re not alphas or not available. Like, taken.”
Dragging a hand down his face, Tadashi closed his eyes. “I’m your brother.”
“Exactly,” Hiro retorted. “Omega heats are shorter when the alpha isn’t mate
material.”
“And it’s generally unpleasant for the alpha, and the omega generally feels
less satisfied and depressed during and after, don’t forget that.”
Hiro shrugged. “It’s better than wet underwear and poor appetite and being
miserable for over a month.”
“You don’t know that.”
Hiro sighed and flopped back on the bed, just beyond Tadashi’s feet. “Look, can
you give me a yes or a no? Will you help me through my heat or not?”
Hiro watched as a number of emotions flitted across his brother’s face. He
could tell that Tadashi was seriously considering it, just because Hiro asked
for it.
Privately, Hiro thought that Tadashi was the best thing that could have ever
happened to Hiro. Protective, caring, gentle… just all around wonderful. But
they were brothers and they could never be any closer than that.
Tadashi sighed. “Why don’t we talk to Aunt Cass?”
It wasn’t a question.
                                   BH6BH6BH6
Hiro feels even hotter as Tadashi’s fingers prep him, thrusting all the while
and trying to get deeper.
His other hand slides over the hot skin of Hiro’s soft stomach, around his
sides and up to his chest. Hiro covers the hand with his own, trying to get
Tadashi to hurry up.
“Please,” Hiro says. Tadashi looks at him, in the eyes, and pauses.
That’s even worse for Hiro. He thrusts up. His thighs are on Tadashi’s, so he
could sit up in his lap if he wanted. But right now, his hole is begging for
fingering and fucking. Slick dribbles out as Tadashi resumes his thrusts.
“I’m ready,” Hiro tries. “Come on!”
Tadashi shakes his head, but doesn’t stop this time. “I want you to come first.
It’ll help me get into it, remember?”
Hiro keens, frustrated by Tadashi’s logic. At least Tadashi is good with his
hands.
Hiro can feel another finger slip into his hole and prod at his insides. The
fingers slip in and out, filling and emptying him with each cycle.
Tadashi’s free hand slips down Hiro’s front until it reaches his waist, holding
him down. With a whimper, Hiro wriggles, trying to get some friction.
Hiro gasps as Tadashi’s fingers brush against his prostate. It’s nothing like
Hiro’s own fingers, and nothing like some of the toys he’s tried.
“Here, huh?”
The fingers change their movements to very short, sharp thrusts aimed directly
at Hiro’s prostate. The younger gasps, his hole momentarily clenching as the
new movements focus the pleasure deep inside him.
Hiro feels like he’s high, soaring like a kite. Tadashi makes him feel so good
– not just physically, either. Tadashi is safe. He’s trust and love. He’s
everything to Hiro, and now he’s pleasuring him, too.
                                   BH6BH6BH6
Aunt Cass was open-minded and thoughtful. For that, Hiro was extremely
grateful. Not all guardians would react well if their younger omega charge
asked about getting fucked by the older alpha charge.
“Um… well.” Being a beta, Aunt Cass wouldn’t exactly have experience with the
whole alpha-and-omega mating-heat thing. Hiro wasn’t exactly experienced with
it either, but he’d experienced the suppress-natural-instincts-and-be-fucking-
miserable thing. He knew he didn’t want to do that.
“I mean, I’ve heard about those omega clinics,” Aunt Cass said hesitantly. She
looked so out of her depth, Hiro almost felt bad for her.
“And how sometimes things go very, very wrong?” Hiro asked sweetly.
Tadashi nudged him. “Hiro.”
Hiro rolled his eyes and looked away.
Aunt Cass thought. And thought and thought.
Hiro started tapping his foot.
“All right, I guess I’m okay with it – but only if both of you do your research
and play with all the cards on the table, and everything is completely
consensual. And you have to talk to a doctor. Neither of you should be afraid
to back out at any point.”
Hiro grinned. That is exactly what he’d been hoping for. “Okay! I’ve looked up
a number of contraceptive options and pheromone reduction drugs and – ”
Tadashi stopped him with a nudge. “Both of us, Hiro. We’ll have to look at this
together.”
Aunt Cass nodded approvingly. “All right, then.”
                                   BH6BH6BH6
Hiro pants, his eyes half-lidded as he comes down from his orgasm. He’s shaking
a little, but that’s okay – Tadashi is right there, a hand holding him steady
on his belly.
Tadashi is looking at his hand, the one that was inside Hiro. It’s shiny with
slick, and Hiro smiles a little.
“Lick it,” he says.
Tadashi blinks, realizing Hiro was watching him examine it. He lowers his hand
a bit.
“Lick it,” Hiro says again. He doesn’t know why exactly, but he knows Tadashi
should taste him.
Tadashi is silent for a moment, and then complies. His pink tongue slips
between his lips and barely touches his hand, just sampling the flavor.
Hiro watches as Tadashi’s eyes widen and darken – his pupil blow wide as he
opens his mouth and presses the flat of his tongue against his fingers, licking
more thoroughly and cleaning his hand off.
Hiro half-huffs, half-laughs. The sight is turning him on again, and he can
feel himself harden at the sight.
Tadashi finishes licking off his hand, and he looks back at Hiro. “You taste so
good,” he says, like he can’t believe he likes Hiro’s slick.
Hiro giggles at the compliment. He makes to sit up, pushing himself up off his
back with his arms.
Little does Hiro know, he’s unleashed something in Tadashi. The elder lets him
sit up in his lap for a second. Their lips meet, and Hiro can faintly taste
something savory but sweet.
When he pulls back, he looks into Tadashi’s eyes and sees something he’s never
seen there before – something raw and untamed, not gentle or friendly but
fierce. Tadashi wants, and Hiro has never seen him like this before.
Before Hiro can think more about Tadashi’s expression, he finds himself thrown
back on the bed, his legs swinging up for a brief moment. Tadashi grabs his
legs and twists, forcing Hiro to roll over.
With a yelp, Hiro finds himself manhandled onto his front and much harder for
it. His face mushes into the pillows as Tadashi’s hands move him around,
spreading his thighs and balancing Hiro on his knees.
Hiro feels Tadashi prod his entrance with something hard, and he draws in a
shaky breath. His first time being fucked, and it’s by Tadashi.
In that moment, Hiro thinks that he wouldn’t want it any other way.
Tadashi slides in smoothly. Hiro’s muscles are practically opening him up, and
slick is spilling out of him. The hot, rigid intrusion is large. It slips in
deeper and deeper, slowly at first and then quicker once Tadashi seems to
realize how loose Hiro is. Hiro gasps as Tadashi’s cock hits his prostate. He’s
still sensitive from before, but he’s oh-so-ready for this. 
“Hiro,” Tadashi says, and Hiro can’t tell if it’s choked or pleasured.
Hiro responds by tensing his ass as much as possible. Tadashi grunts, and his
hips snap forward, pushing him deeper into Hiro. Hiro feels dizzy at the
pleasurable push against that spot inside him.
“You little…”
Tadashi seizes Hiro’s sides, more than hard enough to bruise. With a
viciousness Hiro didn’t think was possible from Tadashi, the elder fucks him.
Hiro pushes back a little to match him, but Tadashi’s grip on his hips does
most of the work.
A moan escapes Hiro’s lips, and Tadashi’s breathing picks up. Hiro feels slick
running down his thighs, and sweat sticks the sheets to him. Pleasure is
exploding inside him, and he can’t think. With every thrust, Tadashi drives
into him deeper and deeper.
If Hiro could think, he would remember that alpha precum has hormones to keep
him from coming, and that alpha seed contains hormones that will extend both
their orgasms when Tadashi knots.
But instead, Hiro just basks in the overwhelming pleasure. Each thrust seems
like it should make him come, but he just can’t. He keens as Tadashi leans
forward more, hitting his prostate more steadily, and Hiro clenches mindlessly,
already ready to come. The sounds Tadashi makes tells Hiro he’s close, but Hiro
is too far gone to care.
A few more sharp thrusts, and Hiro feels more fluids join his slick: hot seed
coats his insides. Tadashi cries out as he releases into Hiro, and Hiro pushes
back, desperate for the knot and for more stimulation.
Hot seed scorches Hiro, and a second later, he’s spurting his own. The dick in
him swells slowly, the pressure building as it widens at the base, locking all
the seed inside him. Tadashi is still thrusting shallowly, breathing
erratically.
“Tada…” Hiro half-says in his orgasmic daze. His toes tingle and he feels like
a limp noodle as endorphins rush through his system.
“Hiro,” Tadashi whispers. He shifts, leaning to lie on top of Hiro from behind,
and Hiro’s legs twitch as Tadashi pushes into his prostate again.
Hiro’s so high on pleasure he’s not sure he’ll ever come down.
                                   BH6BH6BH6
Wasabi looked over at Tadashi across their lunch, face blatantly shouting “WHAT
THE FUCK” but mouth silent.
“Yea, I know. I can back out at any time, and so can he.”
Wasabi sputtered, trying to find something to say. He finally decided on,
“That’s got to be, I don’t know, illegal or something! Hello? Incest?!”
Tadashi sighed. He’d worried about his friends reacting like this, so he
decided to first talk to Wasabi and see what he thought, since out of all of
them he was the least open-minded to this kind of thing. It was against the
typical order of things, Tadashi supposed.
“I haven’t said I’ll go through with it yet. But the idea’s on the table, and
wow, you should have seen Hiro a year and a half ago. He was completely
miserable for well over a month. I can bring that down to a few days, four at
most, and keep it from interfering with autumn classes.”
Wasabi frowned and considered this. “So you’d just, uh, help him through his
heat for a few days. You’ll both be miserable and awkward. And then it’d be
over.”
“Yep. It happens sometimes, when siblings don’t get the same status.”
Wasabi considered. “You think it’s the best option, then?”
Tadashi shrugged. “I think the worst of it would be social repercussions,” he
said honestly. He knew Wasabi would understand that he meant people in general,
and it was by no means directed at him. “I mean, you know I can get people
through heats.”
Wasabi frowned and looked at his sandwich, thinking. “You should get paid for
that, really.”
Tadashi laughed. “Mm, well, I don’t like the idea of going through heats with
total strangers just as much as Hiro doesn’t.”
Wasabi grinned. After a few beats of friendly silence, he asked, “So it’s his
second heat?”
“Third.”
Wasabi looked surprised. “Wait, isn’t he sixteen now?”
Tadashi nodded. “Had his first when he was twelve, for a month under
suppressants.”
“Wow. I mean, I can get him not wanting his heat suppressed, but wow. That’s…
wow.”
“Yea.”
                                   BH6BH6BH6
“Hi, boys!” Aunt Cass’s voice echoes up the staircase. She seems quite lively.
“It’s been four days – you all right up there? Is Hiro almost done? Tadashi, do
you need something to eat?”
Hiro is half-asleep after a marathon of sex. He watches Tadashi get up out of
bed and throw on a robe. Tadashi leans over, covers him with the sheets, and
kisses him on the forehead.
“I’ll be right back.”
That’s exactly the wrong thing to say to Hiro – possibly the last thing he
wants to hear right now. “Tadashi!” Hiro cries, latching onto his arm, suddenly
fully awake.
Tadashi jumps but doesn’t say anything, letting Hiro hang off him like a naked
leech. He clings to Tadashi – Tadashi can’t leave him, not when he’s awake, and
he especially can’t leave him to do anything with another person. Hiro won’t
allow it.
“Tadashi?” Aunt Cass says, her voice much closer but her body still out of
sight. “Are you both decent? I have some breakfast for you and some yogurt for
Hiro.”
“One sec,” Tadashi answers, pulling the sheets around Hiro. “Yeah, we’re
decent. But uh, I’m not sure you should come up.”
Hiro glares in the direction of the disembodied voice that Tadashi seems to
know. But it doesn’t die because of his death glare. “Is everything all right?”
“Hiro’s temperature is still high,” Tadashi answers. “I think he’s still in
heat.”
“You’re brothers – it shouldn’t last more than four days,” Aunt Cass says. “Is
he sick?”
Tadashi takes one look at Hiro and says, “I don’t think so. I think he’s still
in heat.”
Hiro holds on for dear life when the stranger’s head pops up from the
staircase.
The woman looks surprised. “That can’t be.”
Hiro grips Tadashi harder and openly growls at the threat to his alpha. If his
alpha won’t do something about the stranger, he will.
“Hiro!” Tadashi exclaims. “That’s Aunt Cass!”
The words “Aunt Cass” should ring all the bells in Hiro’s head, but everything
is cottoned and muffled to Hiro, who isn’t thinking above a primal level.
He growls as menacingly as he can.
Aunt Cass looks alarmed, but she puts down the food and leaves, saying
hesitantly, “Well, let me know when Hiro’s done…”
                                   BH6BH6BH6
They sat at the computer, Hiro in Tadashi’s lap, researching heats. Tadashi had
his arms wrapped around Hiro’s waist as the younger one scrolled through the
various articles they’d found.
Many of them suggested renting a place and getting laundry services. Almost all
of them talked about recording the physical condition of the omega – how much
they weighed, their temperature, water intake, et cetera and et cetera. Tadashi
shifted beneath Hiro apprehensively.
“If we’re going through with this, then Baymax is going to watch us.”
“Uh, what?!” Hiro twisted around to face him.
Tadashi raised a finger, signaling for Hiro to shut up and listen. “Any other
person watches, and you might attack them or they might be influenced by either
of our pheromones. Baymax is built for caregiving, and I’d rather have help if
we’re going to share your first unsuppressed heat. Baymax won’t emit any kind
of pheromone, and you’re comfortable with him – or at least I think you are. He
can keep records of your condition, in case anything happens.”
Hiro blinked, not sure what to say. “Um, are you into voyeurism?”
Tadashi sighed. “I don’t think so. But I’m not going through with this unless
Baymax is there.”
Hiro ran a hand through his hair and looked down. “Fine. Baymax will be there.
But only because you insist. And he has to be silent and act like he’s not
there.”
Tadashi smiled. “All right then, I guess I’m in.”
                                   BH6BH6BH6
Hiro stirs. He’s being carried, but not by Tadashi, and he feels no real threat
from whoever – or whatever – is holding him. It doesn’t smell like anything.
“Hello, Hiro,” Baymax’s voice says, calm as ever.
Hiro blinks slowly, dazed, and tired as fuck. “Tada…?” he slurs, confused by
this scentless voice.
“I am recording your weight.”
Hiro can’t seem to remember why Baymax is here, but he doesn’t really care.
Right now, he just wants Tadashi, but he can’t seem to find the words.  His
smell is everywhere, beckoning Hiro, reassuring him and making him want to
cuddle until he wants to fuck again, but Tadashi himself isn’t there, and
that’s a problem. “Tadashi…”
“Tadashi is showering.”
“I want,” Hiro says. Then he tries to get out of Baymax’s arms so he can get
closer to Tadashi.
But Hiro is not all there, and instead, he tumbles to the floor with a thud.
Baymax moves to intervene as Hiro half-stands and practically staggers to the
bathroom in search of Tadashi, but Hiro manages to avoid him. He fumbles with
the doorknob until he gets it open, and breathes in the hot, warm air that
smells strongly of his alpha.
“Hiro?!” Tadashi says, pulling back the shower curtain to look upon hearing the
door open. “Uh, I thought you’d be asleep for longer. I mean, I just knotted
you.”
Hiro shakes his head slowly, suddenly feeling a bit more lucid. “You weren’t
there.”
Tadashi seems to process this warily, nodding once. “Well, since you’re here,
why don’t we shower together?”
Hiro doesn’t think about why Tadashi might not want him to shower alone for
safety – he just clambers into the bathtub next to Tadashi, under the hot
water.
“I love you,” Hiro says suddenly, as Tadashi starts cleaning him gently with
soap and water.
Tadashi’s hands freeze for a moment before they keep going, running through
Hiro’s hair and down his back. Soap makes his hands glide smoothly all over,
and Hiro leans against Tadashi, completely uncaring of the fact that Tadashi
was nearly clean and Hiro was far from it.
“How long?” Hiro eventually asks, as Tadashi rubs soap down his legs.
“Four and a half days.”
Hiro frowns, looking Tadashi in the eyes. He feels strangely coherent. “But…
only twice.”
Tadashi doesn’t answer for a moment, instead reaching for the shower head so he
can be sure to get all the soap off Hiro. “Twice what?”
“Knot.”
Tadashi blinks, before appearing to come to some kind of realization. Then he
looks sad, and Hiro kisses his cheek, trying to make him smile. “Tadashi?”
The kiss only seems to make Tadashi blush, but he doesn’t look any happier – in
fact, he looks kind of scared. Hiro cocks his head and hugs Tadashi, letting
the warm water run over them. A moment later, Tadashi’s thick arms are around
him, secure and pleasant.
“It’s okay, Hiro. We’ll be okay.”
The water stops, and Hiro shivers, holding Tadashi closer. The air is cold and
unpleasant. Hiro keens at the sensation.
Tadashi shushes him, and a large, fluffy towel makes its way onto Hiro’s skin,
patting gently and drawing away the moisture. Hiro whimpers when Tadashi turns
him around to dry his front.
“How are you feeling?” Tadashi asks.
“Good,” Hiro replies, and it’s the truth. He’s clean and sated, and Tadashi is
there, touching him.
“Tired?” Tadashi asks.
“Yea.”
Tadashi steps out of the shower and steadies Hiro as Hiro steps out. But Hiro
is sleepy and off-kilter, and he falls over into Tadashi’s arms. Tadashi laughs
a little as he props Hiro up again.
Hiro doesn’t remember Tadashi carrying him back to their other, clean bed.
                                   BH6BH6BH6
Hiro gaped as he watched Tadashi pull things off the shelf in the adult store.
“A dick-shaped water bottle?” Hiro asked, not sure if he should be amused,
horrified, or just plain confused.
“Hey, you read article that with me,” Tadashi answered calmly. “You might be
incoherent and unwilling to eat or drink. So I make it seem like you’re sucking
on my – well, you know. And you stay hydrated.”
“It’s only for a few days. And I think I’d be able to tell your dick from a
water bottle. Non-compatible heats mean the omega is more conscious, right?”
Tadashi shrugged, and Hiro shook his head in disbelief. Tadashi was taking the
whole we-have-to-get-ready thing super seriously, and as much as he appreciated
his brother’s careful planning, some of it seemed almost over the top.
Two special mattress-protecting bedcovers made their way into the cart. At
Hiro’s confused look, Tadashi explained, “We can use both of our beds, and I
can change the sheets on the other while you’re resting.”
“Ah.”
Hiro trailed after Tadashi as they walked by other people – couples, singles,
groups. Only a few bothered to spare the pair more than a second glance, but
Hiro didn’t care. He knew that siblings helping siblings through heats was
rare, but it definitely happened – as did siblings shopping together in an
adult store, he supposed.
“A fake, vibrating knot,” Hiro noted, unimpressed as Tadashi put it in the
cart. “What, you don’t think you can keep up?”
Tadashi rolled his eyes and kept browsing. “It’s not that. Remember, this isn’t
going to be pleasant for me either. I’m not making any promises about whether I
can ‘keep up’, and you already know that omegas tend to have a stronger libido
when in heat.”
Hiro looked down. He’d only meant it as a joke, but his brother was taking
everything seriously. His tone implied that Hiro should too. “Sorry.”
“Hey.” Tadashi put a hand on Hiro’s shoulder, drawing his attention. He was
leaning over just a little bit, in the way that made Hiro’s heart flutter and
warm up because of how reassuring Tadashi was. “I get you’re snippy because
you’re nervous. But I’m nervous too. Let’s not make this any harder than it has
to be.”
Hiro smiled a little bit and hugged him, grateful for Tadashi’s understanding
and support. For a brief moment, while Tadashi hugged him back, Hiro sincerely
wished Tadashi wasn’t his brother so they could be mate compatible.
What Hiro wouldn’t give to have an alpha like Tadashi.
                                   BH6BH6BH6
Hiro moans as his brother pumps his dick and bites his shoulder, trying to make
the younger of the two come.
“Just knot me already!” Hiro whines, half-delirious from the fever. It feels
good, but he needs to be knotted, now.
Tadashi responds by prodding the rim of Hiro’s hole, stimulating it gently. He
pushes a few fingers in, exploring the unusually relaxed orifice. Hiro whimpers
and leans back into the bed a bit as he feels his inner walls be massaged. “You
need to relax, babe. Come for me,” Tadashi croons, leaning back.
Hiro is ready to cry. “I want your knot,” he whispers.
Tadashi doesn’t answer, instead opting to thrust his fingers in and out of
Hiro, making him produce more slick and loosen more.
“Tadashi!”
The fingers thrust in deeper and deeper, looking for that bundle of nerves to
make Hiro come. Hiro’s hands flail until they find a home in Tadashi’s hair,
stubby and short.
“Please!”
The hand around Hiro’s dick quickens, and Hiro whines. He can barely think
through the fever, let alone the relentless stimulation from his brother.
Another finger slips in, barely noticed, and finds the spot Tadashi is trying
so hard to reach.
“Ah!”
Hiro cants his hips back as Tadashi hits the nerves dead on repeatedly.
Pleasure courses down Hiro’s legs, and before he knows it, he’s coming. Seed
sprays onto Hiro’s stomach, hot and messy.
But even after that, Hiro is still hard. It’s the heat keeping him erect, but
Hiro doesn’t care. His legs pull Tadashi closer out of frustration that Tadashi
isn’t in him yet.
“I need you in me!” Hiro snaps right into Tadashi’s face, suddenly furious
after Tadashi keeps stimulating him instead of fucking him.
Tadashi shushes him. “I can’t do that right now. I just knotted you an hour
ago,” he says quietly.
“No!” Hiro shouts. “Fuck me!”
Hiro shuts up as something hard presses into him. It’s huge, like a knot, but
not as warm. Hiro moans as it pushes against his prostate. Tadashi’s hand is
strangely on his ass as he pushes it in and out, whatever it is – dimly, Hiro
knows that means it isn’t really his dick.
Then it clicks and suddenly there’s a buzz on his prostate. Hiro’s hips snap up
and his legs pull Tadashi closer.
Tadashi’s hand keeps going up and down on his dick, but Hiro focuses more on
and is confused by the thing in his ass. It feels good, but he only feels
partly appeased.
Hiro pushes down against Tadashi’s hand, which forces it into him, harder, and
Hiro cries out as his body splits apart, coming yet again. This time, his dick
flags, and Tadashi releases it gently. The buzzing stops, and the intrusion
disappears.
If it were really Tadashi’s knot, Hiro would still be hard, coming continuously
with him until their lengthened orgasms died off thanks to some of the hormones
emitted by a knot, and then they’d be stuck for a while. While Hiro can’t
articulate the thought with all the pleasure and fever affecting him, he still
knows Tadashi didn’t knot him.
“You didn’t…” Hiro whimpers, feeling a tear slide down his face. His glazed
eyes half-focus on Tadashi.
Tadashi moves his arms to either side of Hiro’s head, caging him in with his
body and holding him gently. “Sh, sh. I did what I had to do. How are you
feeling?”
Hiro throws his head back and to the side. “I want your knot,” he whispered.
Then his face contorts angrily and he starts writhing under Tadashi. “You
didn’t give it to me!”
Tadashi smiles sadly and leans back. “Do you want me to come back in a few
minutes?”
Hiro whips his head side to side, still feverish, as he sits up a bit to pull
Tadashi down and closer, as if his outburst never happened. “I need you.”
Then he promptly passes out.
                                   BH6BH6BH6
Hiro almost forgot about the other stipulation his aunt had: see a doctor. Yea,
he knew it would happen for the contraceptive shots, but he’d almost forgotten.
Dr. Drake nodded at them a few times once they described the research and
preparation they’d done, from the logistics of getting it on for a few days to
the social pressure they might face after. He made a few notes on his clipboard
and then said, “Well, it sounds like there’s not a whole lot left for me to
tell you about. I can give you your shots and my phone number in case there are
any problems.”
Tadashi smiled sincerely, grateful for the doctor’s back-up. “Thank you so
much, Dr. Drake.”
“I’ll have one of the nurses give you your shots.” The brothers were left alone
in the examination room, waiting.
“Tadashi?”
“Mm?”
“I just wanted to say thanks. For – for going through this with me.”
Tadashi smiled at him, and Hiro felt his heart warm. Before Tadashi could
reply, a nurse knocked on the door.
“Come in,” Hiro said.
“Hi, boys,” the nurse said as she walked in. “Contraceptive shots, right?”
“Yep.”
                                   BH6BH6BH6
Hiro crawls over the bed to kiss Tadashi’s lap, having just woken from a nap.
“Yes, it’s been – yes, and no signs of slowing down,” Tadashi says. He’s on the
phone. There’s a pause, and Hiro takes that as his cue to grab onto Tadashi’s
waist and lick his stomach, too. One of Tadashi’s hands rubs his back, gentle
and soothing, but Hiro wants all of Tadashi’s attention.
“Baymax, what’s Hiro’s temperature been?”
The robot replies, “Over the past twelve hours, Hiro has had a steady
temperature of between 102.3 and 102.8 degrees Fahrenheit.”
Tadashi pats Hiro’s head as he relays the information. Hiro whines at the lack
of full attention, mouthing over his brother’s cock. He licks at it gently, and
his arms pull at Tadashi’s sides, keeping the older one from shifting away.
“Hiro, stop that,” Tadashi says sternly before turning back to the phone. “I’m
sorry, what?” Hiro whines as Tadashi refuses to turn all his attention to him.
Tadashi’s cock is in his mouth as he does so, and Tadashi gently pulls Hiro’s
face off of it, ignoring Hiro’s distraught sounds. “Yes, he’s awake and
insistent.”
“Tadashi,” Hiro moans.
“Hiro, I’m talking to Dr. Drake,” Tadashi informs him sternly, as if Hiro will
make the connection that it’s important and no, Tadashi can’t let Hiro suck him
off just then. He laps at Tadashi’s cock again, and this time, Tadashi pulls
him further away and says, “No, Hiro. Wait.”
With a pout, Hiro pulls away from Tadashi and flops back on the bed, twisting
to put his feet on Tadashi’s lap. For a minute, he listens. The sound of
Tadashi’s voice is soothing, if it seems a bit strained or stressed.
Boredom leers at Hiro, and Hiro thinks about the article he read with Tadashi,
about how the gag reflex and pain receptors will shut down during heat – mostly
what runs through his mind is that now’s the time to be giving blowjobs.
Impatient for something sexual, Hiro reaches behind himself and shoves three
fingers in without pretense. His own slick lubricates himself as the fingers
pump in and out.
Tadashi tenses when he realizes what Hiro is doing.
“I have to go.” Hiro grins.
                                   BH6BH6BH6
“I’m still hungry,” Hiro admitted quietly. Tadashi took him out to dinner at a
local pasta restaurant since Hiro was craving spaghetti. It was known for its
enormous proportions and cheap prices – one meal often sufficed for three.
Tadashi smiled and offered his own plate. “It’s penne. Do you want some?”
Hiro pushed his own plate away and hesitantly nodded as he took Tadashi’s
leftover pasta. He took a few bites, careful not to meet Tadashi’s eyes.
This was something mates did – taking each other out to dinner, sharing food.
But Tadashi was just his brother and would never be anything more than that to
him.
At that thought, Hiro stopped eating abruptly, fork halfway to his mouth.
Aborting, he replaced the noodle on the plate.
“I thought you were still hungry?” Tadashi asked, showing concern. Then he
seemed to realize that there was something else going on in Hiro’s mind – and
as usual, he was right. “What’s going on?”
Hiro shrugged. “I’m eating as if I’m preparing for a full heat. But the whole
point of this is to have a shortened one, so I shouldn’t eat as much as my body
tells me to.”
Tadashi frowned, considering what Hiro said. “It would put my mind at ease if
you ate to your heart’s content.”
Hiro frowned back. “But I don’t want to have leftover heat-fat. That’s just… I
don’t know. I don’t want to have to work off a number of pounds.”
Tadashi smiled a little bit. “You could stand to gain some weight, you know.
But really, you should listen to your body. If it wants you to put on a lot of
weight for this heat, then you should. Maybe you’ll expend more energy than you
think. And you know, you’re beautiful no matter what you weigh. You look
great.”
Before Hiro could think of a reply, Tadashi leaned over and stabbed some penne
with his own fork. He held it up and brought it close to Hiro’s face. “Choo-
choo, here comes the pasta express!”
Hiro couldn’t help but smile as he batted away Tadashi’s arm. “I’m not five.”
Tadashi shrugged, putting the pasta in his own mouth instead. “Suit yourself.”
Hiro laughed, digging in once again.
                                   BH6BH6BH6
“Is it gonna hurt?”
Tadashi shakes his head, and Hiro can feel it in his hair. He’s sitting in
Tadashi’s lap on the bed, and Baymax is preparing an injection.
“Your pain receptors aren’t working, sweetheart,” Tadashi reminds him,
murmuring into his hair. “I promise it won’t hurt.”
Hiro turns halfway around in Tadashi’s arms. “You promise?”
“I promise.”
Hiro smiles a little and turns around again. He was just knotted a few minutes
ago, and he’s relaxed, content to be held by Tadashi while his body continues
to be a mini furnace.
“Am I pregnant?” Hiro asks suddenly, for no reason at all.
Tadashi laughs breathily. “I doubt it. We got contraceptive shots, remember?”
Hiro did remember. “They hurt,” he whines. “I don’t want to.”
Luckily, Tadashi understands Hiro even when his speech is half-formed. “This
shot won’t hurt. I promised, remember?”
Hiro turns sideways in Tadashi’s arms, nuzzling his neck. Tadashi shifts,
opting to release one of Hiro’s arms and hold the rest of him.
Just as Hiro is about to move his arm back into Tadashi’s embrace, a foreign
hand takes hold and pulls his arm away. Hiro kicks out to the side, alarmed at
the stranger’s presence and the sudden acrid smell of alcohol.
“Tadashi!”
“It’s okay,” Tadashi says softly. He leaves one arm around Hiro’s waist and
uses the other to pull Hiro’s head under his chin, holding the side of face.
The warm, secure embrace – even if it excludes his arm – is reassuring, even
with the not-human stranger-thing.
The alcoholic smell is strong and nasty, and Hiro whimpers. Whatever’s got his
arm is holding it steadily and rubbing his upper arm, making it cold.
“I will now insert the needle,” says a disembodied voice. Hiro doesn’t have
time to react before he feels a prick in his arm. Tadashi’s right – it doesn’t
hurt.
“Does it hurt?” Tadashi asks. His voice is smooth like velvet and comforting.
Hiro shakes his head, closing his eyes. “Why the shot?”
Tadashi just rubs his side and hums. “It’s to keep you healthy. Baymax said
your blood sugars were getting too low.”
“Hn?”
Tadashi squeezes him. “You’re hungry but can’t eat, so you needed a shot.”
This should have alarmed Hiro – but Hiro can barely remember what “Baymax”
means, let alone body activity in a normal heat. Instead, he just says, “Hnn…”
“Do you want to go to sleep?”
Hiro nods. Some part of his mind vaguely registers that he now has a band-aid
on his arm where the prick was, but it doesn’t hurt and he doesn’t focus on it.
Instead, he leans against Tadashi as Tadashi reclines, holding Hiro on top of
him the entire way down. They fall asleep like that.
                                   BH6BH6BH6
This must have been the most awkward situation Hiro’d ever been in.
He and Tadashi were at the police station. The officer looked as if he were
half asleep and completely uninterested in anything they had to say, so long as
he was paid.
“How can I help you?”
Tadashi cleared his throat nervously, and Hiro sidled up next to him for moral
support. “We’re here to file for, um, helping him through his heat.” He
gestured at Hiro and extended a hand with some forms in it, filled out with
precise and neat handwriting.
“I don’t think you need to file for that,” the officer said, making no move to
take the papers.
Tadashi swallowed, and Hiro felt sick. This was so awkward. It seemed the
officer hadn’t realized they were brothers. “We’re brothers. Incest is illegal,
but this is one of the exceptions allowed, provided that participants are both
over the age of 15 and provide the state with prior notice. You need to, um,
file these.”
Hiro looked at the ground while the papers shuffled and fluttered their way
into the officer’s hands. The silence was heavy and thick, and Hiro thought he
might drown.
“I’ve never heard of this before,” the officer said eventually. “You mean you
don’t have the same rank?”
Tadashi replied, “No. It’s rare.”
“Give me a minute.”
The officer let them stew for a little longer, checking something on his
computer. He clicked a bit, read, clicked some more, then read more. After a
few minutes, he seemed to find some kind of procedure. Hiro watched him compare
the papers they’d filed out with something on his screen. A few tick marks
later, and the officer paused.
“So let me get this straight,” the officer said as his eyes bore into them, his
drawl judgmental and condescending. Hiro knew that not everyone would respond
positively to the idea of two brothers fucking for a few days, especially since
it wasn’t common. “You’re going to have sex with your little brother,
repeatedly, over the course of a few days, and you need to file with the police
because that’s illegal under normal circumstances?”
Hiro appreciated how Tadashi looped an arm around his shoulders, as if
protecting him from the harsh tone of the officer. “Yes, sir.”
The officer nodded slowly and resumed his paper-filling. Eventually, he
stopped. “I need verbal consent from both of you,” he said, his face tired and
world-weary and just barely masking his disgust. “Do you both agree to this
sexual conduct?”
“Yes,” said Tadashi.
Hiro nodded.
“Verbal,” the officer repeated.
“Yes,” Hiro said meekly.
The officer made one last note on the papers. “That’s it,” he said. He looked
away as if he didn’t want to look at them. “You’re free to go.”
Hiro couldn’t wait to get out of there.
                                   BH6BH6BH6
Hiro sits down on Tadashi’s lap. Tadashi is nearly asleep on the bed, on his
back. They’ve knotted maybe an hour ago and are still naked. Tadashi is tired,
and Hiro can see that.
But Hiro’s also as horny as fuck and needs him to get hard.
“Hiro, I can’t,” Tadashi says, swatting the younger’s hand aside and away from
him. Ever the considerate heat-partner, Tadashi notices that Hiro isn’t ready
to sleep and is ready to be knotted. “Do you want me to get you off?”
“Knot me,” Hiro answers.
“I can’t,” Tadashi says tiredly. “I really can’t, Hiro. I would if I could, and
I want to, but I – hey!”
Hiro, strengthened by his body’s crazy hormonal state, grabs both of Tadashi’s
wrists, interrupting him. He yanks them up, sitting on Tadashi’s waist.
Up until now, Hiro’s been under Tadashi. Tadashi, taking care of him; Tadashi,
touching him; Tadashi, controlling everything; Tadashi, Tadashi, Tadashi. But
now Tadashi’s tired, and Hiro needs to fill the gap or he won’t be able to have
Tadashi’s knot.
“Hiro? I said I – ” Tadashi’s words die in his throat as Hiro rocks his hips,
grinding against Tadashi’s stomach and leaning forward until their faces are a
few inches apart.
Face flushed and eyes half-lidded, Hiro whispers, “Please.”
Tadashi’s breath hitches and he closes his eyes. Hiro’s bony and lithe figure
presses flush against him, hot and flushed, and Hiro savors the way he can feel
Tadashi’s body, hot and lithe under him. He leans down and puts his lips
against Tadashi’s in a sweet kiss.
Tadashi seems compliant enough, so Hiro lets go of one arm and reaches behind
himself. Without preamble, he plunges three fingers into himself, rubbing and
slickening himself for Tadashi’s knot. Tadashi doesn’t move his arm to stop
Hiro, so Hiro slides down against him, pressing more of their bodies flush
together while kissing him and fingering himself.
Hiro hums into the kiss and knits his eyebrows as he fingers himself as deep as
he can go.
Fingers coated in slick, Hiro withdraws his fingers and pulls back a little bit
from the kiss. He can feel that Tadashi isn’t hard under him, not yet.
“Hiro…” Tadashi says softly.
Hiro bats his eyes once and playfully draws up his hand covered in slick. He
locks eyes with Tadashi as he licks a stripe down one finger, slowly, showing
off his tongue.
Tadashi can’t seem to look away. But he’s not protesting anymore.
Once Hiro’s mostly done cleaning off his hand, he leans down and kisses Tadashi
again. He’s certain that Tadashi can taste him from his lips – there’s no way
Tadashi could miss it. Hiro lets go of Tadashi’s other hand to cup Tadashi’s
face as he Frenches him, but Tadashi doesn’t move, save for how his breath
hitches as Hiro grinds down into him.
Hiro keeps his eyes closed as he explores his partner’s mouth, licking behind
the teeth and slipping their tongues together. Mesmerized by every crevice,
every contour, Hiro hums.
Below him, Hiro can feel Tadashi getting hard, slowly but surely. He smiles
into the kiss. He knew Tadashi had another knot in him – he just knew it. It
just takes a little coaxing.
Hiro holds Tadashi’s face as he leans back a little for air. With the smile of
an imp, he scoots down and nips Tadashi’s collarbone.
“Ah!” Tadashi’s exclamation is short, but it’s everything Hiro wants to hear.
Hot hands find their way to Hiro’s sides, supporting him as he rubs their
pelvises together and suckles on Tadashi’s collarbone.
“Geez, Hiro,” Tadashi says breathlessly. His breath hitches as Hiro nibbles,
grazing with his teeth.
Hiro knows Tadashi is tired, so he takes it on himself to line up and sit down
on Tadashi’s dick. Tadashi gasps, almost as if in pain, but he doesn’t push
Hiro off. His hands slip down Hiro’s sides and rest on his thighs as Hiro sits
back to get a better angle for himself.
Hiro grins, eyes half-lidded, and pinches one of Tadashi’s nipples, savoring
the way Tadashi’s hands clench almost tightly enough to bruise. Then he
bounces, clenching his ass for Tadashi.
Tadashi throws his head back as his breathing gets unsteady, and his hands
clench and unclench as Hiro pleasures the both of them.
Up and down, up and down – Hiro rides until his thighs feel hotter than usual,
but there’s no pain as he keeps going. Tadashi even kicks in, too, hips
snapping up to meet Hiro’s bounces and arms keeping him lined up.
Hiro gasps as Tadashi decides to fondle his dick as he rides. He’s long gone
before Tadashi comes with a low groan, filling him up and locking all the seed
in him.
Thought is nearly impossible for Hiro as he keens at the bulge in his ass. He’s
thoughtlessly still bouncing a tiny bit, riding out both of their pleasure.
They’re both shaking a little bit as they come down, still locked together.
Hiro’s dick is limp, but there’s still a while before Tadashi’s will flag and
release them.
Hiro blinks and smiles fondly at Tadashi, who’s still reclined in the bed. His
face has a fleck of Hiro’s come on it, and a large pool of it on his stomach
and chest.
Tadashi smiles back, fondly and tiredly. Without saying anything, he reaches
toward the nightstand, where damp and dry washcloths wait to wipe away sweat
and semen.
With a shake of his head, Hiro stops him and stretches out himself, taking the
washcloth. He haphazardly wipes off Tadashi, who places his hands back on
Hiro’s thighs and massages gently.
They remain in that position until Tadashi’s knot is gone, and Hiro pulls off
to flop down on his chest. Sleep claims him in a moment, and he doesn’t
register Tadashi’s fond petting.
                                   BH6BH6BH6
When people say “heat”, they usually just refer to the sexy parts – the days of
marathon sex and lovey-dovey shit and mating.
They don’t usually include the weeks prior to the sex week. There’s first the
put-on-weight and stock-up-energy phase where omegas eat, eat, eat, and eat.
Then, about twelve hours before the heat starts, there’s the clearing of the
digestive tract so the ass is empty.
That’s what Hiro was experiencing.
Hiro coughed, spitting out some more vomit into the toilet. Tadashi rubbed his
lower back, gently, as if he were just sick, not emptying his digestive system
to turn part of it into his reproductive system for a few days.
“Hey, buddy,” Tadashi said, once Hiro seemed to be done. Keeping one hand on
Hiro’s lower back, he held out a cup of water. “How are you feeling?”
Accepting the water, Hiro rinsed and spit before flushing the toilet. Then he
swallowed shallowly and leaned back from the toilet. He shook his head.
“I don’t feel hot yet,” he said, “but I do want to use the bathroom, if you
don’t mind…”
Tadashi smiled a little and stepped out. Once Hiro finished, he wandered out to
find Tadashi sitting on his bed, waiting for him. Baymax stood in his charger,
watching them silently. Knowing that Baymax was probably logging everything he
could tell about Hiro, Hiro couldn’t help but feel a touch embarrassed.
“What do you want to do?” Tadashi asked. Hiro shrugged. “We could watch a movie
on your computer, play video games, design something… It’s up to you.”
Hiro nodded silently, feeling sluggish and tired. “Um… I guess a movie sounds
nice.”
Tadashi smiled his ever-lovable smile, and Hiro flushed, returning a weaker
smile. They traded places as Tadashi set up a movie, rearranging the monitor so
that they could watch from the bed.
It was some superhero action thing, but Hiro didn’t really care. As they
watched he found he couldn’t focus properly and had to ask Tadashi who the main
character’s friends were. His attention was actually on Tadashi, who had an arm
around his shoulders and held him against his side.
Tadashi was really hot – not temperature wise but physically, Hiro thought. He
could feel the result of semi-regular gym activity through their clothes, and
Tadashi’s face was handsome. Hiro unthinkingly turned his face to Tadashi’s
chest, just thinking that he wanted to snuggle.
Tadashi laughed and stroked his hair with his free hand. “Are you even
watching, Hiro?”
Hiro shook his head, suddenly apprehensive.
Tadashi, ever perceptive, turned his head so that they were looking at each
other. “What’s going on?”
Hiro blinked, then turned away and onto his side so that there was space
between them. “I just… I just want this over with.”
Somehow, Hiro could hear Tadashi’s smile in his voice. “Hey – I got this.” Hiro
relaxed as he felt Tadashi roll over and spoon him from behind, sliding an arm
under him so he could hold him securely. "Baymax and I will take care of you.”
It felt like there was a baseball in Hiro’s throat as he tried to swallow. “I’m
scared,” he whispered.
Warm hands held his torso, and hot breath ghosted over his ear as Tadashi
whispered back, “I got you.”
They stayed like that, the movie ignored by both of them, until Hiro had to
throw up again.
                                   BH6BH6BH6
Hiro wakes up to find a hand between his legs. He jerks away, only to find that
there’s a body behind him.
“You’re awake!” Tadashi says with surprise. “And you’re not hard,” he says,
mystified. Hiro vaguely wonders why Tadashi would comment on that before
deciding that that can wait.
He pulls on Tadashi’s hand, and Tadashi moves it to his midriff. The smaller of
the two turns around from where they’d been spooning, and looks at Tadashi
straight-on.
“Hello, Captain Obvious,” he says, nonplussed.
Tadashi studies him for a half second, eyebrows knit. “How are you feeling?”
Blinking slowly, Hiro says, “Tired. Hot.” He yawns once, big.
Despite Hiro’s calm, Tadashi scrambles to sit up and says, “Baymax, what’s
Hiro’s temperature?”
Hiro’s surprised that Baymax doesn’t say anything before he remembers that they
temporarily reprogrammed him to use the display to communicate more than his
voice. Curious, Hiro too sits up, eying Baymax’s bright stomach.
It’s displaying a graph, one that is fairly level and then starts curving down
halfway through.
Hiro grins and turns to Tadashi. “Looks like my heat’s almost over.” Sidling up
to Tadashi, he hugs him close, ignoring their nakedness. It’s not like Tadashi
hasn’t seen any of it before. “Thank you.”
Warm arms encircle him, snug and secure. “You’re welcome. Baymax, could you go
downstairs and tell Aunt Cass Hiro’s almost done?” They settle into the bed
again, wrapped around each other as Baymax toddles down the stairs.  
A few minutes later, Hiro laughs. “You know, I’d’ve thought that having sex
with me would make you want to put some distance between us for a bit. Or that
I’d want some.”
“Do you?”
Hiro shakes his head, knowing Tadashi could feel it under his chin. The elder’s
arms circle him and pull him closer; Hiro melts into the hold, perfectly
content.
Tadashi decides that explanations can wait.
End Notes
     Eheheheh Hiro WAS SO OUT OF IT HE DIDN'T CATCH IMPORTANT CLUES
     MUHAHAHAHA ~~~ Aftermath next chappie :-)
     Anyway, I hope you liked this!! Leave kudos, I appreciate them lots.
     :-)
Please drop_by_the_archive_and_comment to let the author know if you enjoyed
their work!