Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/7185170.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Percy_Jackson_and_the_Olympians_-_Rick_Riordan, Percy_Jackson_and_the
      Olympians_&_Related_Fandoms_-_All_Media_Types
  Relationship:
      Nico_di_Angelo/Jason_Grace
  Character:
      Nico_di_Angelo, Jason_Grace, Will_Solace
  Additional Tags:
      Rape/Non-con_Elements, (very_very_mild_and_in_passing), Omega_Nico,
      Alpha/Beta/Omega_Dynamics, Alpha_Jason, Mating_Cycles/In_Heat, First
      Time, Smut
  Stats:
      Published: 2016-06-13 Words: 3498
****** Hands-On Education ******
by levirvin
Summary
     “I’m in what?”
     “You’re in heat?... Do you… not know what that is?”
     “I know what it is, but I’m not an omega. I’m just plain demigod.”
Notes
     This was originally a request for Eruri, which I also filled, but
     these two ships are honestly pretty much the same but just with
     different names, and I thought this might be a good Jasico fic, too,
     so I switched the names and I'm posting this PJO version (with some
     minor editing, of course).
     **Small spoiler: the Rape/Noncon elements I tagged are for a very
     minor part when Jason is explaining knots to Nico, who has no clue
     what they are. And of course, it's hands-on education.
See the end of the work for more notes
Fucking again.Again, Nico woke up with a fever. That had been happening several
times a year since he was 12. Why couldn’t his shitty immune system just give
him a rest for once? Groaning inwardly and ignoring the ache in his stomach, he
forced himself upright. He needed to go pick up some more ambrosia squares,
anyway.
He dressed himself enough to go out in public and set out towards the
infirmary. He noticed a larger number of kids looking at him; well, larger than
the usual zero. Did he really look as shitty as he felt? For their sake, he
hoped not, because he sure as hell felt really fucking shitty.
Why did he even get these fevers so much, anyway? No one else he knew got them
as often, and as bad, so where was he catching them from all the time? For some
reason, that particular fever seemed worse than a lot of the others. Usually he
would just take some ambrosia and sleep for a few days, but he had a feeling
it’d take more than that to comfortably get through this one.
——
Once he showered after his morning sparring session with Percy, Jason decided
he’d stop by the dining pavilion for a snack, and the infirmary for some
ambrosia. Not that he was sick or injured, of course; with health like his, it
was a rare occurrence... Well, except during this time of the year. This
fucking time of year, he always ended up catching a cold. Do demigods even
catch colds? Well, he caught whatever the demigod equivalent of a cold was. So
he figured he’d stock up on ambrosia and tissues now, so he didn’t have to drag
himself out of bed once he actually was feeling shitty.
As soon as he walked through the doors, he knew something was off. There was a
sickeningly sweet smell in the air. Oh, whatever. An infirmary as busy as
theirs were bound to have some sort of weird smell, weren’t they? He shrugged
it off and continued on to the small waiting area.
As he was standing there trying to figure out whether to sit between a sick
Ares kid or a bleeding Iris kid, he found the source of that scent: Nico, the
Hades kid, a lovely little omega talking to Will Solace, not 10 feet away from
him. The beta healer must have noticed his scent, too, from the way he was
blinking rapidly and trying to maintain focus on what the omega was saying. A
commendable act, as focusing was not easy with that delectable boy around. No,
that’s fucking creepy. Delectable? Who is he, that guy from Silence of the
Lambs? Hell no. But come on, was it really his fault if the omega at the
counter was so tiny and skinny and cute? His baggy black sleep-shirt was almost
hanging off his shoulders, and though it fell so loosely around his skinny
frame, Jason could tell his waist was absolutely microscopic. And apparently
Jason wasn’t the only alpha who’d noticed him. A few seriously creepy-looking
guys were slinking up to the counter, eyeing Nico like a bunch of disgusting
perverts— oh, wait. Wasn’t that what Jason had literally just been doing? No,
no, never mind that. These guys were— were—- grosser. Just plain grosser. And
the only right thing to do was rescue him. At that very moment, one of the
sleazeballs, an Ares boy, moved to stand next to the omega, leaning his elbow
on the wall and resting his head in his hand, looking down at Nico like a plate
of steak just waiting to be devoured. Jason saw the alpha’s mouth move, so he
drifted a little closer to hear what was being said, and he couldn’t believe
his ears. The alpha was talking about taking the little boy back to his cabin
and impaling his tight little hole on his big thick cock until he screamed and
begged for mercy so loud that Hades could hear him. Oh, hell, no. The boy paled
even more (if that’s possible) as his eyes widened and he visibly tensed. That
is to say, he looked really fucking uncomfortable with this douchebag of an
alpha leering down at him. Just then, Will came back with a pouch of ambrosia
squares for the boy. The omega nodded to him, turned back to the alpha and
managed a meek, “No, thank you,” grabbed his pouch, and started to walk away...
right into Jason. The sweet, sweet smelling omega bumped right into Jason’s
chest and let out a small sound of surprise. He looks up at Jason with his
pretty brown eyes and Jason inwardly thanked every god that ever existed for
this very moment.
“Hey,” Jason said smoothly. Or, as smooth as he could be with that sweet scent
of heat wafting around.
“Um… sorry,” Nico said, but made no effort to move away.
“Do you want me to walk you back to your cabin? It seems like there are a lot
of creeps after you today.”
The boy seemed to take a moment to think about it, but soon after, he looked
back up at Jason and nodded slightly. “Thanks, Jason, I think that’d be a good
idea.”
“No problem, Neeks.”
“Don’t call me that,” Nico grumbled, but Jason didn’t miss the way the corners
of his mouth turned up ever so slightly as he stormed past him and out the
door.
——
They were a few yards from the infirmary when the ache in Nico’s stomach got
even worse. The pressure grew impossibly more intense and he made a small noise
of discomfort. Jason immediately stopped walking and turned to him with concern
in his eyes. Nico made another, louder noise, and doubled over in pain. Jason
leaned down closer to Nico’s level and wrapped a strong arm gently around his
back, but Nico let out a moan and unconsciously increased his heat scent, which
got the attention of a group of more rowdy Ares alphas standing outside their
cabin adjacent to the infirmary. Jason realized he was letting out heavy
protective alpha scents in return, so he tried to tone it down. Nico wasn’t
even his, for Gods’ sakes. Though, maybe he shouldn’t have tried to tone it
down just then, because the alphas were drifting closer to them. Even without
being up close, Jason could see the hunger in their eyes.
“Um, Nico, my cabin is closer, I think. You don’t seem to be in the best shape
to walk much further.”
“No, no,” Nico began, not yet noticing the alphas. “We’re pretty close to Cabin
13. I just need to get home, take half a square, and sleep for a thousand
years. It’ll be fine.”
“A square? Of ambrosia? For this? Ambrosia doesn’t even work this far into—”
Jason was cut off as the tallest (and fattest) of the group spoke up.
“Hey, baby, do you need a big, strong alpha to take care of you? Smells like
Grace here hasn’t even claimed you.”
Nico looks equal parts confused and scared out of his mind. “Okay, hey, Jason?”
“Uh-huh?”
“I’m gonna take you up on your offer now.”
“Uh-huh.”
——
After a short walk that felt like miles, they finally arrived at Cabin 1. As he
was unlocking his door and Nico was leaning against the marble, overly-white
wall, the latter mumbled, “Why has this been happening so much today?”
Jason held the door open for Nico and asked, “You mean all those assholes?”
“Yeah.”
The boy sat down on the base of Zeus’s statue as the taller closed the door.
“Well, you’re in heat.”
Time stopped.
“I’m in what?”
“You’re in heat?... Do you… not know what that is?”
“No, I mean, I know what it is, I’ve heard of it, but I’m not an omega. I’m
just plain demigod.”
Jason sat down next to him, all too aware of the small distance between their
thighs. “Well, obviously you are, because, let me tell ya, you’re giving off so
many pheromones right now.”
“I am?” Nico’s eyes widened as he looked up at Jason. “Wait, so does that mean
you’re an alpha, then?” Jason made a noise of affirmation. “And I’m in heat…
Aren’t you supposed to be going crazy trying to fuck me right now?”
Jason sighed. “Well, to be honest, I really, really want to, but I’m trying
really hard not be one of those douchebag alphas from earlier. I just really
want you to feel safe.”
Just then, another wave of pressure and pain coursed through Nico’s stomach.
“Jason?”
“Yeah?”
“I really need you to fuck me.”
It was almost as though those were the magic words. Jason pinned him down on
the floor of the cabin and kissed him roughly, tasting the sweet omega. After a
few moments of kissing, he broke away and placed his large hands on Nico’s
small hips, not missing the fact that his fingers spanned them almost entirely.
He easily turned Nico over onto his stomach and yanked up his hips so that he
was almost on all fours. Jason’s strong grip kept him in place as he ground
against the omega’s ass. Nico felt slick moisten his hole and heat rose to his
face. He grasped Jason’s hands around his waist tried to get out of his grip,
but Jason, smelling both the slick and Nico’s panic, wraps his arms around
Nico’s waist to hold him completely, and says, “Nico, shhh. It’s okay. That’s
perfectly natural.” He leaned down further to whisper against Nico’s neck. “And
you have no idea what it makes me want to do to you.”
Jason readjusted his grip so that while one hand was holding his waist, the
other was wrapped around the boy’s ribcage, the muscled forearm completely
wrapped around the front of his chest. He lifted up the boy’s upper body so
that he was kneeling in front of him. The hand that was holding his waist
unbuttoned and yanked down Nico’s pants, and they somehow managed to get them
completely off. Then Jason manhandled him into facing towards the alpha and
slung him over his shoulder.
Jason stood and carried him like he weighed nothing (which, comparatively, was
true) and swirled a few fingers of his free hand around his rim. He roughly
shoved in two at once and Nico cried out, but Jason just continued to pump them
in and out of his tight hole. Finally, Jason felt the lump of nerves and rubbed
over it nonstop to a chorus of Nico’s moans. After a few attempts, the alpha
managed to fit three of his thick fingers inside the boy and stretched him,
rubbing against Nico’s walls until the little omega is just quivering and limp
over Jason’s shoulder, finally succumbing to his omega weakness.
Jason finally reached his bed on the other side of the cabin and laid Nico down
on his back and crawled over him. He placed the backs of Nico knees on his
shoulders so that his pretty pink hole is completely exposed and vulnerable for
Jason to do whatever he wanted to it. Nico’s hand drifted to his cock, so Jason
caught both of his slim wrists with one hand and pinned them above the omega’s
head. When Jason leaned down to kiss him, the boy went completely pliant
beneath him. The alpha lined up the thick head of his cock with Nico’s hole.
Jason broke the kiss to ask, “Are you sure you want to do this? Just because
you’re in heat doesn’t mean you have to let me fuck you. You can back out, I
won’t be mad.”
Nico looked him in the eyes and breathed, “Fuck me, alpha. Please.”
With that, Jason pushed in. He felt Nico tense and watched him squeeze his eyes
shut tight. Jason let go of his wrists to cup the side of the boy’s face,
searching within those features to find whether that tenseness was from pain,
being uncomfortable, or just the strangeness of having a cock in his ass. Nico
was so tight around his cock that he was finding it incredibly difficult not to
just pull the boy the rest of the way onto him and pound him into oblivion.
After a few moments, Nico gripped Jason’s wrist as he tried to relax his body.
“Are you okay?”
“Yeah, it just hurt a lot at first. You’re not exactly small.” Jason looked
apologetically at him, not ever wanting to hurt this tiny little omega in his
arms. “You can— ah— move now.”
The alpha pushed in slowly, inch by inch, until he was finally seated inside
the little omega’s hole. After a few moments of adjustment, Nico nodded and
Jason let loose. He pushed in and out with such force that the bed creaked. He
fell into a moderate pace and made sure to angle himself to that he hit Nico’s
prostate with almost every thrust, judging by Nico’s whimpers.
Now, Jason wasn’t the type of alpha who went around fucking every omega he saw,
but having this tiny little omega beneath him, squirming on his cock, was one
of the most delectable feelings in the world, even if they were barely even
friends. Though, he guessed they’d be a lot closer than that once they were
through.
The sounds of Nico’s whimpers and moans as Jason moved inside him brought the
alpha back out of his thoughts, and for the first time since they started
mating, Jason really took a look at the omega he was inside of. He was so
small; short, and painfully skinny if the prominent ribs and hipbones were
anything to go by. Nico’s soft, dark hair was currently in an arousing state of
disarray, framing his sharp, pale cheekbones now painted with a soft glow of
pink. His eyes traveled down to Nico’s puffy pink lips. With every thrust of
Jason’s cock, Nico was letting loose wanton gasps so debauched that Jason had
to concentrate hard on staving off his orgasm. Jason’s eyes were drawn down to
the omega’s stomach, where he could see the bulge of his own cock every time he
thrusted in fully. The alpha reached out to touch it, which made Nico open his
eyes and look at the same spot. He gasped.
“It’s in my tummy…”
“Yes it is, omega. Can you see it?”
“Mm, yes, I can feel it, too.” Nico dropped his head back onto the pillow and
moaned.
“You can feel it deep in your little tummy? You feel my cock thrusting so far
in?” Nico moaned again and nodded his head as Jason thrusted in even harder and
deeper than before. “You feel it in your insides?” Again, the omega nodded his
head, this time accompanied with a long, soft moan. “Does it hurt?”
“A little, but— ah—” The omega moaned as Jason pressed his palm hard into the
bulge in his belly. Nico shuddered and gasped even louder, his insides
clenching beautifully around Jason as he came. He went limp and spaced out,
letting his knees fall off of Jason’s shoulders as the alpha continued to fuck
his sensitive, used hole as hard and fast as he could. The feeling from his own
palm being pressed against his own cock through Nico’s stomach coupled with the
image of the tiny omega so blissed out and at his mercy was what drove him to
his climax. His thrusts grew unsteady and erratic as he clenched his teeth and
growled low in his throat. Finally, after the deepest thrust of all, he groaned
and stilled inside the small boy. He gathered the omega in his arms, still
kneeling, and they remained embracing each other, sated. Well, almost.
Nico noticed that Jason hadn’t let loose any cum, and he didn’t ever see him
put a condom on. He started to ask about it, but just then, he noticed the base
of Jason’s cock was even harder and more swollen. This confused him even more
because the rest of the thick cock inside him was still slowly softening. The
mass started moving towards the end of Jason’s cock and further into Nico,
swelling even more as it went. Nico cried out and tried to get away but Jason
held him in place. “No, let me go, please, just pull out, Jason, I don’t want
this anymore!”
But the alpha just shushed him. “I need to stay inside you for a while longer
or it could hurt you.”
“Wh— what? I don’t— ah!” As he was speaking, Nico had tried to move and had
managed to slip out of Jason’s grasp somewhat, but this benefited absolutely no
one, as the knot in Jason’s cock was yanking at the rim of Nico’s hole, causing
him more pain than nearly anything he’d ever felt in his life. He tensed and
curled in on himself, tears forming at the corners of his eyes. It was then
that Jason realized that if Nico didn’t even recognize his own heats or his
omega status, maybe he wasn’t familiar with the process of knotting, either.
“Do you know what’s happening?” Nico shook his head, looking up at Jason, eyes
wide. “Well, when an alpha fucks an omega and he climaxes, he gets what’s
called a knot. Do you know what that is?”
“I’ve heard of it…”
“Good. It’s where there’s a part of his cock that swells up and moves into the
omega and locks them together until the knot goes away, and then they’ve
finished mating. Unfortunately, it isn’t easy to just pull out before the
knot’s released. I’m really sorry, Nico. I know you said you don’t consent
anymore, but I can’t stop or else it’ll hurt you really bad, especially with
how tight you already are.”
“No, no, it’s fine… I guess I was just… scared.” Nico seemed to think for a
moment. “How long until it goes away?”
“About forty five minutes for me, usually.”
“So we just have to lay here?”
“That’s the idea.”
Jason then tried to gently maneuver them onto their sides but in doing so, he
jostled Nico a bit too much and the boy cried out again, trembling in his arms
ever so slightly. Once again, the guilt of having hurt this beautiful little
omega washed over him, so Jason held him even tighter and laid a sweet kiss to
Nico’s cheekbone. The omega settled into the warm space just below the alpha’s
chin, his arms folded up against his own chest like a child cuddling with a
parent. Fuck, it is not a good idea to compare Nico to a child when he’s balls-
deep in his ass.
At some point during their join, Nico had fallen into a light sleep and Jason
was teetering on the edge of snoozing when he noticed that his knot had finally
started going down. After a few more minutes it released enough that he could
pull out without hurting the boy, though the drag on his insides did manage to
wake him up.
“Is it over?” Nico asked.
Jason hated how Nico asked that as if he had been miserable the whole time,
though, now that he thought about it, maybe he really had been during the
knotting at least. “Yeah, it’s over. Do you… wanna stay here, or should I take
you back to Cabin 13? Because I totally don’t mind you staying here for a
while, but if you wanna go back, I don’t mind that either.”
“I think I kinda wanna sleep for a while. Even though you were the one doing
all the work, I still feel kind of exhausted.”
“No, yeah, I totally understand.” Jason flicked off the lamp light as Nico
turned over. “So I’ll… be outside, I guess…” Jason started walking slowly
towards the door.
“Um, Jason?”
“Yeah?” he answered, too quickly.
“Could you stay in here instead?”
“I’d like that, Nico.” Jason crawled back into bed behind Nico and pulled the
covers up over both of them. He held the boy tight in his arms and caught
himself thinking about how perfectly they fit together, that it was almost like
they were made for each other. But no, that was crazy. Nico’s just small and
Jason’s just big. It’s not that rare. He was sure Nico could fit ‘perfectly’
with half the other alphas in the city. Thinking about Nico in the arms of any
random alpha made him start to get angry when he reminded himself of those
sleazebags outside the bar earlier. That negative energy couldn’t have been
translating well through his natural alpha scent judging by the way Nico’s
sleeping form tensed in his arms, so he forced himself to stop thinking about
it and just went to sleep. In the morning, he couldn’t quite recall his dream,
but he knew there was no way it measured up to the reality of holding this
dark-haired angel in his arms.
End Notes
     Thanks for reading!
     I have a tumblr where I post mostly Eruri with a dash of Nico di
     Angelo. Requests are always open, of course!
Please drop_by_the_archive_and_comment to let the author know if you enjoyed
their work!