Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/8620372.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      モブサイコ100_|_Mob_Psycho_100
  Relationship:
      Kageyama_Ritsu/Kageyama_"Mob"_Shigeo
  Character:
      Kageyama_"Mob"_Shigeo, Kageyama_Ritsu
  Additional Tags:
      Omega_Verse, Alpha/Beta/Omega_Dynamics, Shota, Sibling_Incest
  Stats:
      Published: 2016-11-22 Completed: 2017-04-06 Chapters: 5/5 Words: 7267
****** A Full Moon ******
by MerryGoat
Summary
     It was no surprise to anyone, even himself, when Ritsu presented as
     an Alpha. And even more predictably, when Shigeo presented as an
     Omega.
     However, nobody expected the taboos that would be broken between
     these two brothers upon these discoveries.
     UNFINISHED. Never to be complete. QwQ omegaverse just isn't my thing.
Notes
     Thank you for the lovely request Sanctuns! Hope you enjoy this~ The
     title is basically it’s my shit pun about a full moon being slang for
     ass. And wolves which are always associated with full moons. Just…
     Just go with it.
     WARNINGS: Underage (They are both aged down) and sibling incest.
     This is heavily based on wolf breeding habits, and I researched how
     wolves get it on for a while to get a grip of this universe. So there
     will be some obvious differences between this and most omegaverse
     fics.
     MATING SEASONS: “Heat season” only happens once a year, but continues
     on from December to March.
     ANATOMY: This is really self indulgent, so omega’s still do have nice
     wet butts, and Alphas have knots :3c
     SUPPRESSANTS: Suppressants are not a one step cure for sexual need
     here. But it can subdue the symptoms enough for children to be able
     to function day to day, and eventually they can do without taking
     medication in adulthood (Especially once with a mate).
See the end of the work for more notes
***** Chapter 1 *****
It was apparent that Ritsu was going to become an Alpha ever since he was a
toddler. Despite being a year younger than his big brother, by age 6 he had
reached 7 year old Shigeo's height. By age 8, he was already showing the normal
Alpha characteristics. Naturally bold, with a strong build and personality
which often made him the shining star of the two brothers to outsiders.
And at age 9, there was nothing left to question his alpha status when he
nearly attacked an older Alpha student who gave his brother a “gross look”
while they were walking home together.
It was no surprise when he was the first to present his status in life. Ritsu
fell into his first heat just a few weeks after in the first days of Winter.
What started out as a normal morning was ruined the moment he tried to get out
of bed. Waves of nausea hit him, disorienting him back into bed. There was an
awful smell in the air, sickly musk filled his head as he struggled out of bed.
When he finally got out of his room, both of his parent’s were waiting, knowing
smiles on their face. They smelled him before he even got out of bed.
Their little boy was an alpha.
His parents were proud, his classmates were envious, and his prepubescent big
brother was just happy Ritsu had some upper hand in life.
It was proof that he was finally becoming a man! A 9 year old man. He hit
puberty a couple years earlier than his fellow classmates, even earlier than
his big brother. But this sudden development did not really change him, nor the
way he looked up to his brother. It only explained a lot of his natural habits
he had already developed.
The first heat was awkward.
He looked normal, even felt normal for the most part. His father immediately
left (but not before congratulating him) and purchased suppressants from the
pharmacy while his mother gave him “the talk”.
And the medication definitely helped. There was no issue in getting up and
about, and he didn’t want to mate with the first thing that crossed his path.
But he couldn’t control his erection every time he caught the whiff of a
particularly nice omega. Every little foreign scent annoyed him, dizzying him
with his new found sense of smell. He had rubbed himself on just about every
surface in the house, claiming it as his own (much to his Alpha mother’s
amusement). He often caught himself gnawing on his sleeves, pencils, even his
own hand. And trips to and from school with his brother became a nightmare
since he found himself seeing red every time a stranger even looked at Shigeo.
But after 3 months of hell, mating season finally ended. And life went back to
normal.
…
Until next December came around.
10 year old Ritsu was just beginning to get the hang of this whole “heat
ordeal” once the new breeding season started. Love and lust was literally in
the air, making Ritsu want to vomit when his sense of smell was at it’s most
sensitive. Hormones made every breath of air feel stuffy. It took him a few
days to finally be able to stomach getting out of the house without a medical
mask covering half his face.
A week of his own tedious heat had passed slower than a speeding microorganism.
It was quickly beginning to be old news, just a new hassle he couldn’t do a
thing about. For the huge deal most kids his age made of it all, he was sorely
disappointed with how annoying it was. Nothing but a persistent bug on his
shoulder that was useless to him for now.
A new day, a new challenge. Ritsu forced himself up, swinging his legs over the
edge of the bed. The cold floor made him wince, but he shuffled his bare feet
across the room and to the door. His eyes were lidded, a sour taste in his
mouth distracting him from his surroundings. Auto-pilot mode dictated his
actions after weeks of repeating the same school morning routine.
A haze clouded his mind while he wondered what was for breakfast. He pulled the
door open, stepping out and preparing to head to the bathroom for his usual
morning. Brush teeth, take medication, change clothes. But he only got a foot
out the door before he stopped dead in his tracks.
Groggy eyes blinked open, and his nose twitched at the foreign scent that
permeated thick in the air. A sweet, musky scent of an unfamiliar Omega. The
likes of which he had never smelled before. A smell that was so familiar and
strange at the same time, so intoxicating... It absolutely called for him.
His body reacted before he could make sense of the new situation. Before he
knew it, he was face to face with his brother’s door. There was no mistaking
it, this was the source of the new aroma. Without even wasting the time to
knock, he pushed the door open and entered the room.
“H-hi, Ritsu,” Shigeo greeted, sitting at the edge of his bed.
Ritsu struggled to answer, licking his lips as he tried to find the correct
words to continue. There his big brother was, looking so… Vulnerable. The 11
year old was curled up at the edge of his bed, arms strapped around his
stomach. He was visibly shaking, the tiniest little whimpers escaping his lips
as his toes curled in discomfort. There was no mistaking the source of the huge
wet spot on the sheets next to him.
“It’s not really a surprise, huh?” Shigeo gave a shaky smile, trying to
casually broach the subject.
Ritsu tried to muster a response, but was interrupted by incoming footsteps.
Their mother was the first to walk into the room, standing behind Ritsu with
her hands on his shoulders.
“Congratulations Shige, I’ll make sure to stop by the store right now. Ritsu,
come on,” She rushed, dragging a reluctant Ritsu by the shoulders out the door.
Their omega father took their place in the room, and shut the door behind him.
Ritsu was stuck staring at the wall between him, and the person whose very
scent felt like a drug to him. His own brother. His pupils nearly drowned out
his iris’, and he was gnawing on his bottom lip.
“Is Shigeo really…” Ritsu trailed off, looking up at his smiling mother.
“It seems we have a perfect pair, an Omega and Alpha in the house,” She
answered, patting his shoulder. “But we should leave them alone, Shigeo will
need to miss school today. You can walk him tomorrow,” She stated, pausing for
a moment when she realized what a bad idea that was.
But Ritsu didn’t leave room for follow ups. He heard what he needed to hear,
and strolled to the bathroom without turning once. He needed to get dressed
quickly. There was no real way to excuse the clear bulge at the front of his
loose pajama pants.
***** Chapter 2 *****
Chapter Notes
See the end of the chapter for notes
By the time Ritsu came home from school, the rest of his family had already
surrounded the dinner table. He was the last one to scoot into his seat, just
beside Shigeo. A celebratory feast was in order for their newest Omega! Just
what Ritsu needed. To sit less than a few inches away from his brother, whose
very scent sent a pang of arousal through him the moment he stepped into the
door.
"Ritsu, are you ok?"
Ritsu was startled out of him mindless daze, so busy focusing on trying to look
normal, that he forgot it wasn't considered normal to become entranced with his
plate without lifting a single utensil.
"Ah, yeah nii-san..." he muttered, pressing his hand against his neck
awkwardly.
Shigeo tilted his head in just the slightest show of confusion, but didn't
press on. Though it was obvious he wanted to. That much was clear by the way he
spent the rest of the dinner glancing back at Ritsu every few moments. The
younger Alpha felt a shiver through his arms each time Shigeo glanced at him,
so innocently determined to figure out what was wrong with his brother. Unaware
of how horribly sinful his brother's predicament was, that he was only making
worse with constant attention.
Ritsu had droned out the conversations surrounding him, only occasionally able
to get a bite of food in. He had taken his medication in the morning, but his
stomach was turning and his erection (which he casually hid with the TOTALLY
not obvious hand against his crotch) wasn't going to wane any time soon. It
felt like his first heat all over again. And that was nearly impossible to
hide.
"Ritsu!"
"Huh?" He turned up again, suddenly aware that all eyes were on him. "Sorry,
I'm... I'm not feeling well, may I be excused?" He asked, not waiting for an
answer. He received a quiet, concerned "Yes," when he had already stood up and
pushed his chair in.
What an annoying little predicament he got himself in. He refused to admit that
he was actually... sexually attracted to his brother. Despite what his body was
telling him and the twitch in his cock every time he thought of Shigeo, it was
obvious that wasn't the case.
Ritsu bound up the stairs with little regards of the whispering his family was
doing about him. All that mattered was that he got back to his room, and calmed
himself down. He had to put logic to something that he was sure was perfectly
explainable.
That he wanted to do very grown up things with his brothers... Things he had
only learned about the year before, yet his body seemed more than ready to dive
right into action.
Of course his thoughts were of a normal brother. Ritsu admired his big brother.
He wanted to live up to his expectations. And there was no shame in being just
a bit over protective of Shigeo! After all, it was merely in his very DNA. Just
like being an Omega was in Shigeo's DNA!
So it was also completely natural that he, as a full on Alpha, would begin
having some odd thoughts about the new Omega that he literally lived with.
Nothing strange about finding his big brother adorable, that was simply the
truth. Shigeo had such soft, touchable arms, neck, cheeks, lips... But that
wasn't the point. As he knew. That was simply the truth, and anyone with
working eyes would notice that!
Then there were the... "supposedly" less than normal thoughts he was
developing. Things that a few quick internet searches revealed were "wrong" and
"weird"... But surely none of these people had a brother like his.
Because if they did, they would entirely understand why he suddenly found
himself fantasizing about his big brother... How he had spent the entire school
day, day dreaming of barging into his brother's classroom. He would pull Shigeo
to the front of the room, force everyone to see. To see that his big brother
was HIS and no one else's. And there was one easy act to make the message loud
and clear.
There was nothing exhibitionist in his thoughts. At the very least, they
weren't intended to be. But how he would adore to at least be able to pull
Shigeo against his body, and leave a lovely purple mark on his neck for
everyone to see. To let the world know that just because his big brother was a
young omega, that he was NOT free and ready for the taking of the first Alpha
that dared try to court him.
Yes. His thoughts were perfectly normal, and he had nothing to worry about.
Because surely this was merely the beginning shock of having an omega brother.
Nothing but a short phase that would pass in a few days, when he got himself
used to the idea that he would have to deal with the damned intoxicating scent
every winter.
But it would pass.
----
If only Ritsu were so lucky.
Ritsu had spent just about the entirety of Shigeo’s first weak of heat stuck in
his own room whenever he came from school, avoiding any confrontation with the
object of his desires. It was part of his plan to make this temporary period of
taboo desires pass quickly, hopefully slipping under the radar of the rest of
his family.
But there was no escaping today. Not when he was woken up first thing in the
morning with a tug on his blankets, pulling the warmth away.
"Ritsu... Wake up," Came a hushed whisper.
"Nhg... Huh?" Ritsu muttered, rolling off of his stomach to lay on his side. He
opened his eyes, blurry vision just able to make out the unfocused outline of a
person. The room was dark, he couldn't make out exactly who was in his room in
the post-slumber haze. When vision failed him, his sense of smell filled in the
answer.
"Nii-san?" He questioned, blinking in confusion. His hand patted around the
bedside the table, finding the switch of the lamp. Both brothers squinted at
the sudden light.
Shigeo nodded, his small hands fisting and pulling on Ritsu's blanket. "I need
- I think I need help," His voice was shaky, he sounded so distressed.
"What do you need?" Ritsu asked, pushing himself up on his elbow. His eyes were
wide and attentive, ready to spring into action. Did his brother hurt himself?
Have some sort of accident?
Shigeo's cheeks were a deep bright red, and he refused to meet Ritsu's eyes.
Even as he gulped audibly, nodding to himself as if he had just found resolve.
He looked so vulnerable in that moment...
There wasn't a single word shared between them as Shigeo crawled onto the bed.
Ritsu offhandedly looked out to the clock on his bedside table. It was barely 4
am, not even the sun had come up.
"What happened?" Ritsu asked, pulling the covers aside. Shigeo didn't need to
be told, he immediately slipped under the blankets and huddled beside his
younger brother.
"I don't know," He muttered, hands clinging onto Ritsu's pajama shirt. "I
couldn't sleep, a-and I... I just wanted to..." He pressed his cheek against
Ritsu's chest, breathing in deeply. His eyelids fluttered closed. He seemed at
peace, breathing in his Alpha brother's scent.
And Ritsu was no exception to the natural allure. He pressed his nose against
Shigeo's hair, arms easily finding their way around his older, yet smaller
brother's body. It was intoxicating, and Ritsu couldn't bring himself to care
about how wrong this might look to others. They were just really close
brothers, absolutely no shame to be had.
Even when he could feel Shigeo's small erection poking his leg.
"You didn't take medicine last night?" Ritsu asked, getting the answer when
Shigeo shook his head against his chest.
"I forgot," Came the quiet whine as he tried to bury himself deeper into
Ritsu’s chest. “I didn’t think I needed it, I felt fine…”
“You felt fine because you took it earlier,” Ritsu sighed, a worried frown on
his face. Shigeo had always hated taking any kind of pill, be it for a cold, or
as serious as a suppressant now. Sure, Ritsu had hated it as well. But it only
took him one nasty morning to remind him that he needed to twice a day, on
time.
Shigeo only gave a one shouldered shrug, body quivering between his brother’s
arms. For both of their sake, Ritsu ignored the hardness pressing on his thigh,
and the way Shigeo whined every time Ritsu moved in the slightest.
’This is my life now,’ Ritsu thought, trying to keep as still as possible after
shifting back to his back. Shigeo immediately clung to his side, clearly just
as confused and distressed over his first heat season as anyone else. At least
he had an excuse to be a mess, eager to cling onto any Alpha for the security
his young mind instinctively desired, remnants of an ancient past where these
instincts were necessary for survival.
But Ritsu had taken his medication. He knew how to control his urges, and there
was no just “accidentally” giving in. So there was no excuse to explain his
erection, neatly pushed down by the band of his pajamas pressed just under the
tip.
Chapter End Notes
     After much plotting out and getting adorable ideas (shout out to user
     INLOVE, I absolutely NEED to use your idea~) I decided to make this a
     bit longer than I originally anticipated xD but don't worry, the porn
     is just as quick to come as previously planned (aka, next chapter). I
     just decided to make it longer to add on a lot more fun scenarios
     that can come of this plot.
     So hopefully nobody has any complaints xD and thank you for coming
     back to read again ^q^
***** Chapter 3 *****
Chapter Notes
See the end of the chapter for notes
Despite the awkwardness of the situation, Ritsu managed to doze off again. Be
it from either exhaustion, or just the fact that it felt safe to be with
Shigeo, he managed to sleep off the rest of the early morning. A comfortable,
dreamless sleep that was undisturbed by the alarm since there was no school
today.
Usually he would have stayed asleep for a good more few hours, not having a
real reason to get out of bed other than to get breakfast. But just as he fell
asleep in unusual circumstances, he was awoken in an even stranger scenario.
Now there was nothing out of the ordinary for waking up with Shigeo in his bed.
After all they were young, still unashamed in confessing their fears of storms,
strong winds, even nightmares. And there was zero issue with crawling into one
another's bed, basking in the protection of the beloved brother they admired.
However, it didn't take him long after waking up to realize something was very
wrong. To the point where he feared opening his eyes. Not from fear of what he
would find, but of fear of how he would react if he was right.
Because without him noticing, Shigeo had managed to hike his leg up against the
top of Ritsu's thigh. His big brother was laying on his side, creating the
perfect position where such a leg position caused his crotch to press
unabashedly against Ritsu's upper thigh.
And Shigeo was hard. So. Freaking. Hard. Hours of sleeping through his first
heat season without medication had left Shigeo an absolute mess. Ritsu had an
arm tucked under Shigeo's side, the curve of his waist fitting perfectly atop
his forearm for optimal fitting into the tiny bed. It also made it easy for
Ritsu's hand to pat down on the back of his pants, confirming the sticky wet
substance that bled through the fabric and clung to his hand.
But that was hardly on his mind as he focused on what Shigeo was doing.
Ritsu forced himself to be brave, to have enough confidence in himself that he
wouldn't throw himself on his brother at the first chance. He squinted his eyes
open, just able to make out Shigeo's face pressed against his shoulder, eyes
shut and mouth open to release tiny pants. The rest of his body was hidden by
the blankets.
But the movements were clear from even the thick layer of sheets covering them.
Small, jerky, repeated movements. The sound of wet schlicks and fabric moving.
The undeniable sensation against his skin.
He held his breath, eyes widening in disbelief. His... His big brother,
innocent as could be, was humping his leg. And he had been going at it long
enough to accumulate an excess amount of wetness, his new found ability of
creating pre-cum effectively soaking through his pants, and into Ritsu's own
pajamas.
Ritsu didn’t know what to do. There was no sex ed class in school that was
subject, “How to deal with your big brother masturbating himself against your
leg!”. Nor had he ever heard of such a situation coming up since being siblings
was SUPPOSED to mean there wasn’t a shred of lust between them.
But it was obvious that the rest of the world was either A) Lying about their
own urges and they all secretly wanted to fuck their siblings. Or B) Ritsu was
truly disgusting. And no matter the answer, it didn’t change the fact that he
couldn’t bring himself to do a single thing to stop it. He didn’t want to stop
it.
And he honestly didn’t plan to, but his little front row seat of his brother’s
natural urges was cut short when the door suddenly swung open.
“Ritsu, is Shige here with- Oh there you are!” Their mother exclaimed, leaning
into the doorway. She paused for a second, nose twitching in the air before her
eyes fell on Shigeo’s shivering form. Ritsu’s hand was locked at his hip,
keeping him from thrusting any further. Her brows furrowed as her eyes switched
between Ritsu’s owlish stare and Shigeo’s barely stirring form.
“He had a nightmare, so he came over at…” Ritsu paused to stare at the clock,
flinching when Shigeo’s head finally lifted off his chest. He could feel those
curious eyes staring up at him. “Just a few hours ago, said he didn’t want to
be alone…” Ritsu finished, looking down at his brother. It was clear Shigeo was
confused with the conversation he overheard.
“Alright, well remind him to take his medication when he gets up. It smells in
here,” Their mother said, scrunching her nose. “Your father and I are leaving
early today to take care of some bills, and then we’re both going to work. You
guys can eat some cereal, right?” She didn’t wait for an answer, “Right you
can. So we’ll see you tonight,” She said, pushing the door all the way open
before she turned around and left.
Ritsu glared at the door, “She always leaves the door open,” he muttered,
pouting his lip.
“Ritsu, I didn’t have a nightmare.”
Oh right. He had a whole other issue to deal with. “I know you didn’t, but it’s
just better if she thinks so,” Ritsu sighed, “She’ll get mad at both of us if
she finds out you didn’t take your medication. You for not taking them,” And
him for not making him take them. But he didn’t voice that, and instead started
sitting up.
He pulled his arm out from under Shigeo, trying to escape the situation with
his dignity before a sudden hand gripped his retreating wrist.
“Ritsu, was that me?”
A shiver ran down his body as he turned, eyes immediately dropping to his
forearm. He was hoping Shigeo wouldn’t notice, but apparently he underestimated
just how big a mess it was… But no more would he ever question the fact that
his brother was a human lube container, as the dramatic shine of the morning
dawn gleamed off copious amount of slick Shigeo had rubbed on him.
Shigeo wasn’t the best at reading between the lines. But he’d have to be blind
to second guess what exactly his brother’s arm was covered in, and he wasted no
time in scrambling off the bed. He stood over the empty side of the bed that he
just laid in, wide eyes staring at the huge wet spot he had left on the
mattress.
Ritsu was quick to save his brother from further embarrassment, and crossed his
legs together to cover the wet spot on his pants he had rubbed on him.
“I’m sorry,” Shigeo’s voice was shaky, distressed at the mess he had left
behind. “I’ll clean it up, get up and I’ll do the sheets and, I-” He shut his
mouth, shaking like a leaf in his spot.
“Don’t worry about it nii-san,” Ritsu quickly waved off, “This is nothing, it’s
a lot less worse than the time you puked in my hoodie at least,” He forced a
laugh.
Shigeo’s face only grew redder at the reminder as well, and Ritsu wondered if
he had chosen the right words. But there was no time to contemplate it,
especially with the especially sharp pangs in his lower tummy as instinctual
arousal filled him. He just had to focus on getting Shigeo out.
“Ritsu, just get up so I can wash them,” Shigeo whined.
“Honestly nii-san, it’s fine,” Ritsu smiled, half leaning against the pillow.
“Just take a shower so I can take one too, you can do the work of setting up
the bath for me,” he stuck out his tongue.
Shigeo seemed reluctant, but he was turning around to leave. Until of course
his eyes widened with a bright idea. Oh, this should be interesting.
“Why don’t we just take a bath together?” Shigeo smiled, “It’s been so long,
and we can play with our old toy boats!”
Oh how the gods were truly tempting him now.
“Nah, I’ll wait,” He said, mourning at the loss. But there was no way he could
shower with his brother. Not with the major hard on he’d been sporting since…
Well it’d be safe to assume it had never gone down since his brother presented
as an Omega.
Looking dejected, Shigeo’s shoulders slumped and he nodded. But it was enough
to finally get him out of the room. EVEN IF HE DIDN’T CLOSE THE DOOR EITHER.
But that was the least of Ritsu’s worries as he kept his head up, silent as he
tried to hear for the tell tale…
Shhhhhhhhhhhhhhhhhhhhhhh
Ritsu fell face first into the pillow when he heard the shower run, breathing
in the scent of his brother. And he couldn’t resist it for a second longer,
dropping his hand to spread his fingers in the damp sheets. It was still fresh,
still wet enough to spread through his fingers. It didn’t matter if it was cold
already. He could use his imagination to picture just how hot it’d be straight
from the source.
He grunted, biting the side of the pillow his brother used as he brought back
his slick covered hand up to his waist, and pushed it into his pants to hold
his own aching member. Ritsu had wanted nothing more at that moment than to
mate. To bite into, mark, and absolutely fill his brother to the brim in his
seed.
Instead he rutted like a beast into his own palm, growling and gnawing on the
pillow as he tried to make up for his need to fuck with the poor substitute of
his hand. Thoughts passed through his mind in glimpses. Memories of how his
brother looked naked, bathing, changing in front of him. How vulnerable he
looked just hours ago, crawling into bed with him. So needy, already ready to
be taken. And how he woke up with his own brother humping his thigh, even sleep
unable to deter him from his natural urges.
Not more than a minute later he could feel his knot, a lump rising up the
length of his cock. A tiny, pathetic little knot that had yet to fully mature,
but was eager to plug up a mate. And he tightened his fist around his dick, a
last thrust into his hand before his balls finally twitched and forced out a
rope of cum with every pulse.
It was without a doubt his most shameful, quickest, and powerful orgasm.
Chapter End Notes
     Writer's block is a horrid curse that has been plaguing me lately.
     But GOAT WILL PREVAIL!
     Thank you for reading! Hopefully the chapter was at the very least
     interesting to read. All feedback is super appreciated ^q^
     Since I've been using it more often, feel free to titter about
     horribly sinful things on twitter @Octo_piss
***** Chapter 4 *****
Chapter Notes
     Long wait for such a short chapter, but I finally have the entire fic
     plotted out at least, so the rest of the updates should be weekly or
     so ^q^
     HUUUGE THANK YOU TO USER "INLOVE". You inspired about 5 new chapters,
     and I had so much fun plotting around your amazing ideas.
See the end of the chapter for more notes
The Monday back to school was definitely not at the top most of Ritsu's
favorite moments. Despite the sudden changes in their lives, they continued on
as nothing. They woke up, got dressed, took their medication at the same time -
which Ritsu now insisted on seeing Shigeo take it in the morning, a school day
being the LAST place he wanted his big brother to fall into the throws of a
heat…
But aside from that last addition to their everyday lives, everything else was
perfectly normal. Down to their walk to elementary school, arm to arm as they
walked the few blocks together.
Scratch that last part. Their walk to school was perfectly normal to Shigeo.
Ritsu, on the other hand, was an entirely different case. He was able to put up
a good front of normalness beside his brother, but he couldn’t help darting his
eyes between every single human they saw. Logically, the little old alpha woman
walking with a bag full of fruit shouldn’t have been a threat. But to Ritsu’s
hormone ridden conscious, she was as much of a danger to Shigeo as the teenage
alphas who spent much too long staring at his brother.
‘Sick, all of them are sick,’ Ritsu cursed, lip twitching as he glared down at
the passing herd of middle schoolers walking to school just feet away from
them. It never occurred to him that maybe, just maybe, they were staring
because the tiny alpha boy was practically snarling at everyone - taking away
all the attention from the 11 year old omega who walked beside him.
For the most part, Ritsu was able to control himself at home. His need to mate
was held down by medication, which made it a tad bit easier to return to his
normal free days of adventuring with Shigeo, playing games, helping their
parent’s cook, etc.
That didn’t mean he didn’t have his fair share of close calls, however… Namely,
Shigeo waddling back into his room, hair dripping wet from the shower, but
still fully dressed. “What’s that smell,” he had asked innocently, sniffing at
the air while Ritsu viciously tried to wipe his cum slick hand on the back of
his shirt, hiding the evidence that he had just humped his own hand while face
first in the pillow that was covered in Shigeo’s scent.
Or how the day after that, just yesterday, when Shigeo took another shower. Oh
don’t worry, RItsu didn’t try jacking off to his brother’s scent again. He had
much more dignity than doing such a desperate act TWICE. Nope, never… he merely
snuck into Shigeo’s room, pulled out his futon, and rubbed his entire body -
rolling around, patting it everywhere, nuzzling it - on the futon, to leave it
covered in his scent. See? Much more proper.
Of course he was caught in that too. But there was no cum to point to any
perverted intentions, so he was able to explain to Shigeo how he merely wanted
to sleep on the floor to straighten up his back. You know, to cure back pain
and all. Because it’s perfectly normal for a 10 year old to be suffering from
chronic back pain.
So to all those who cry, “Trying to scent your own flesh and blood is creepy
enough!” or “It’s not proper to drool and gnaw on your brother’s futon!”, Ritsu
asks…
“But did I fuck him?”
And the answer to that is NO. Therefore, the opinion of anyone else was null,
and he’d feel perfectly normal for these rising feelings he had for his
brother. They were all easily explained by the fact that Shigeo, had it going
on.
__________________________________
A good 20 minutes before school had begun, they entered the open gate into the
yard. Ritsu could feel a school field full of children staring right at them,
even though it was nothing more than the few ordinary turns to see who just
came in. But logic had no place here, not when Shigeo was literally ready to
get fucked, and prancing around as his usual cheerful self.
Ritsu kept his head up high, refusing to let anyone believe they even had a
chance of getting near Shigeo. HE was the alpha in charge, in all his 10 year
old power, and would be the only one allowed near his brother!
“Hey Mob!”
No! His extremely powerful protection had failed to keep everyone at bay!
Someone had passed his barrier of glares and slipped right through the cracks,
and was much too close...
It was Tsubomi, an Alpha, and one of the first to present in her entire grade.
She stood there, hip cocked to the side and eyes twinkling like the night sky…
full of pollution and unable to see through their thick smoke of lies!
Disgusting, Ritsu thought.
“Hello Tsubomi!” Shigeo practically glowed as he greeted her back. He was
clearly elated over the attention, so Ritsu didn’t interject. Instead he
decided to watch Tsubomi instead, who was way too close to Shigeo for his
comfort. He was hardly paying attention to their exchange, but the girl’s
posture was enough of a threat to send blaring alarms to his mind.
That little girl (who, to be fair, was older than him. But I digress.) Was
honestly trying to be sneaky… But Ritsu saw the way she leaned in, hands behind
her waist as he bowed forward. Her nose twitched a few times, taking in
Shigeo’s scent. And he saw the immediate change of her expression when she
noticed his new status, eyes widening just long enough for Ritsu to feel
defensive. She didn’t even have to ask. Shigeo’s scent was like a basket of
holiday pines, almost too strong to take in.
“Alright, just wanted to ask you about that assignment,” Tsubomi nodded,
finally backing away. And good timing too - for had she stayed even a second
longer, Ritsu would have surely challenged her to a duel! But alas, she must
have sensed his hostility, and ran away… at least it gave Ritsu comfort to
think so.
“See you later!” Shigeo called back, waving excitedly.
Ritsu twitched, but managed to push away his sour expression.
“We have to go to class, Nii-san,” Ritsu reminded, tugging on Shigeo’s sleeve.
His brother jolted at the sudden touch, being flung back into reality and out
of the strange bubble of thoughts he had been caught in.
“Right, but can we stop by the bathroom first?” Shigeo asked.
“Of course! The one in the office hallway is the closest,” Ritsu suggested,
waiting for his nod of approval before grabbing onto Shigeo’s sleeve, and
pulling him towards the bathroom. No way was another stinky kid going to get to
his brother this time!
________________
Ritsu washed his hands in the sink, absently rubbing his hands together as he
waited for Shigeo to finish his business at the urinal, just a few feet away
from him. It was difficult to keep his eyes to himself, the temptation to sneak
a peek at his brother’s exposed skin was almost too much.
He was dealing with this mental dilemma, wondering about what type of excuse he
could use to look, when the bathroom door swung open. While Shigeo was
completely oblivious to it, more focused on being able to pee without splash
back, Ritsu was immediately at attention.
It was a teacher. Another Alpha of all things. Of course on Shigeo’s first
public appearance as an Omega, all the Alphas decided to crawl out of their
caves and seemed to always be around!
The teacher, Mr. Mitsuura, strolled in as natural as can be. Didn’t even notice
Ritsu’s piercing glare after him, making sure he kept his distance. But of
course as fate would have it, of all the stalls in the bathroom, HE PICKED THE
ONE RIGHT BESIDES SHIGEO!
Already practically foaming from the mouth, Ritsu scrubbed his hands harder
under the running water. His entire posture changed, prepared to strike at any
moment.
And then it happened…
It started with a simple sniff, as Mr. Mitsuura first caught a whiff of the
Omega in the room. A look of realization crossed his face. And then, the
finishing blow, a curious look. He had turned his head, looking at Shigeo over
the short urinal dividers. And then looked DOWN.
…
Ritsu ended up missing lunch for the rest of that week, having been forced into
his first detention for having bitten a teacher right on the face, drawing
blood. From his protagonist assigned detention seat, at the back corner of the
class beside the window, Ritsu was forced to watch as Shigeo’s classmate Alphas
finally took notice of him, and tried to gain his trust with gifts of their
pudding cups, or home snacks.
Ritsu learned a powerful lesson that day. And that was to aim for a sneak
attack from behind, and avoid the inevitable reprimand that came with
assaulting a teacher.
Chapter End Notes
     Thank you for reading! All feedback, especially constructive
     criticism or ideas, is appreciated!
***** Chapter 5 *****
Chapter Notes
See the end of the chapter for notes
It was your average Sunday night, AKA the day all school kids spent the
majority of their time rushing through their weekend homework at the last
second. And these two siblings were no exception.
Ritsu and Shigeo laid across each other, bellies down on the floor as the did
homework. Every once in awhile Shigeo would ask Ritsu for help, and in turn,
Ritsu would ask Shigeo for training hours - time Shigeo spent trying to teach
Ritsu how to use psychic powers. Because despite the fact that Ritsu was seen
as the “lucky” one for his status, the younger brother truly envied Shigeo’s
natural psychic abilities.
“Ritsu, how do you do this one?” Shigeo asked, tapping his pencil against his
jutted out lip.
The Alpha looked up to assist him, eyes on the paper as he explained the math
problem step by step. It was until they both came up with the answer that Ritsu
finally looked up, and stared at Shigeo’s face that was illuminated by the
ceiling light.
A faint shimmer covered Shigeo’s lips, becoming impossible not to stare at once
he noticed. Ritsu looked back down at his work, trying to pass it off as a
trick of the eyes, or perhaps even saliva. But curiosity got the better of him
as he once again looked up and focused solely on Shigeo’s lips, the older boy
pursing his lips slightly as he hummed in thought. And there was no denying it
this time. There was a genuine shimmer on his lips.
“Nii-san, why are your lips…” He paused, wiggling his fingers. “Shiny,” was the
word he decided on
Shigeo looked blank faced for a moment, cocking his head curiously before he
opened his mouth in a “Ahah!” moment. He smeared a finger across his lower lip
and held out his finger to show Ritsu the pinkish shine on the pad of his
finger. “Lipstick!” He casually explained, looking back to his homework as if
he didn’t just say something so strange.
Ritsu blinked, the gears in his mind coming to a complete halt at the
revelation. “Why are you wearing lipstick?”
Shigeo smiled, looking at his finger with the cutest flush on his cheeks. That
site alone would have been enough to send Ritsu into lalaland - had it not been
for the words that came out of his brother’s mouth.
“The other alphas in class were talking about how it’d make me more popular if
I start wearing it. They said it’s super cool!” he chirped, pursing his lips.
“One of them, hum… Mezato? Even bought me lipstick she said she thought would
look the coolest on me. She said all the omegas like wearing it!”
Somewhere, middle school boys and one girl across seasoning city would tell the
tale for years to come of how they felt a demon looming over them all at once.
Their very souls shaking in fear they could only describe as, “a truly vengeful
spirit cursing us for unknown reasons” as the legend would go.
But back in the Kageyama household, Shigeo didn’t notice the twitch in his
brother’s eye, nor the intense aura that was practically hanging over him.
“Nii-san…” Ritsu swallowed the lump in his throat, unable to deny that a tiny
(hah) part of him liked it. “You don’t have to wear lipstick, it’s just
something a lot of people think Omegas should wear. If you don’t like it-”
“But I do.”
Huh. Well there went Ritsu’s lovely speech about masculine omega acceptance.
“They make my lips a lot softer, and I think they look nice,” he smiled,
resting his chin on his hands. He had dropped the pencil the second Ritsu gave
him an excuse to ignore his homework.
“But don’t you think…”
“What?” Shigeo asked, cocking his head.
‘Shoot, shoot, shoot!’ Ritsu cursed in his head, unable to even imply that the
lipstick was a bad thing. But it was an absolute double - no - triple edge
sword.
1. Ritsu really liked it. He wanted to stare at it, take pictures of Shigeo in
it to stare alone in his room at night when he’s doing less than holier things
to himself, touch it, just… Appreciate how great his brother looked in it.
2. Because he really liked it, he felt himself instantly get hard. Yes, Ritsu
found himself getting hard over a lot of things nowadays. Some extremely
concerning things at that, like a squirrel standing on it’s hind legs at just
the right angle to look like a furry phallus at sprouting out of the earth at
first glance. BUT. This did a lot more than make Ritsu’s body react. It made
the air leave the room, his cock begin to pulse, and hormones go on a rage
trying to stink up the whole place like an aroma bomb.
3. He wouldn’t be the only one to like it.
And that last fact nearly threw Ritsu into a fit. It was far too tempting not
to invest his savings on a cage to keep his brother in, just for himself. But
that would be selfish, and Shigeo would be sad… So instead he set to marking
his territory in the most innocent way possible. A method that would at least
put himself at ease, knowing he was the only one to be able to do this.
Ritsu licked his lips shakily, scooting closer to Shigeo until they were nearly
forehead to forehead. “Nii-san,” he called out innocently, staring up at his
big brother. And the moment Shigeo turned up head up, Ritsu captured his lips
in his own for a small, chaste peck on the lips. Shigeo froze in place wide
eyed, gears in his mind coming to a halt.
“Yeah, you’re right,” Ritsu nodded, turning back to face his homework. “They
are really soft now.”
Now, kissing one’s family on the lips was hardly something taboo. In fact up
until a couple years ago it was exclusively how these two brothers kissed one
another. Innocent, tiny pecks on the lips that meant nothing but “I love you
brother”.
This… this was something entirely different. At it’s face, it was no different
that the hundreds of other times they had done this as younger children. But
somehow the general air in the air felt different. Even their reactions were
completely different. Usually Shigeo would giggle, peck him back and return to
whatever his task was. And Ritsu was nothing short of smug for being able to
catch a fast one on his.
This time they were both red faced, unable to even look at each other in the
eyes after the little act of affection. They felt different somehow, and no
matter how much they tried to mask it by acting casually, any anybody else
would see the shift in the room clear as day. Even if neither of them dared to
acknowledge it to themselves.
And just a floor below, both of their parents grew mildly concerned at the
eruption of hormones in the air.
Neither of them could quite focus on getting back to homework that night, and
eventually both managed to fall asleep head - to - head on their pile of papers
on the floor. Pencils still in hand, frozen on a question that would never get
an answer by the time these boy begun drooling, the brothers slept. An easy
thing to do at this young age, children seemingly able to sleep on surfaces
that would make adults cringe in phantom back pain. And for any other couple of
children, a harmless little nap.
But for these two, a disaster. For it meant a pair of brand new alpha and omega
had fallen asleep in the same room without their medication.
Chapter End Notes
     hummm... I realize kissing on the lips is not really common in all
     cultures? But that's how I grew up with my siblings so it was normal.
     Just tiny pecks for affection are normal. So I shoved that here,
     except a little extra feeling due to their less-than-holy destiny :3
     Shout out to the lovely INLOVE who gave the amazing idea of adorable
     lipgloss on this boy. I love it and love you :'D
     that being said, incredibly short chapter, but only because this was
     originally one chapter broken up. so the next part is already
     written, but felt awkward adding it without a chapter break. It'll be
     up in a few days and a good deal longer because... *winkwonkwinkwonl*
     ^q^
End Notes
     Thank you for reading! Any and all comments are super appreciated.
     Hope you enjoy it so far Sanctuns~
Please drop_by_the_archive_and_comment to let the author know if you enjoyed
their work!