Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/9715541.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      モブサイコ100_|_Mob_Psycho_100
  Relationship:
      Kageyama_"Mob"_Shigeo/Reigen_Arataka
  Character:
      Kageyama_"Mob"_Shigeo, Reigen_Arataka
  Additional Tags:
      Aftercare, Dom/sub, Hand_Feeding, Porn_Watching, Dom_Mob, Sub_Reigen,
      Master/Pet, Shota, Getting_Together
  Series:
      Part 3 of Dom_Shota_Mob_Oneshot_Series
  Stats:
      Published: 2017-02-14 Words: 4225
****** Before and Aftercare ******
by MerryGoat, reigenonice_(TardisType221b)
Summary
     “I… I know you like this kind of stuff,” he whispered. “I know you
     want to be dominated.”
      
     As Mob cared for his Shishou he reminisced on how it all began.
Reigen limped out of the bathroom, knees still sore from the good hour he had
spent on them. But at the least his breath now tasted of fresh mint instead of
old piss and come. Mob was already standing up beside the couch motioning
Reigen to come hither. When Reigen arrived, his little Shishou dropped a pair
of cough drops on his palm from his own desk drawer.
“Thank you,” Reigen said, nodding his head forward in gratitude. He felt it
would have been more appropriate, and more enjoyable for himself, to go down on
his hands and knees to show his gratitude for the concern from his Shishou, but
his knees were aching too badly, and he didn’t think Mob wanted him to overdo
it.
Mob plopped down on the end of the couch, and Reigen waited until he was waved
over to follow suit. He was about to sit down next to him, when Mob raised a
single hand, motioning him to pause.
“Lay down, you need it.” The boy smiled sheepishly, patting his lap invitingly.
Sometimes doing this still made him feel a tad awkward.
Not wasting a single moment, Reigen flopped onto the couch on his side like a
true dog. He rested his head on Mob’s lap and was repaid for his hard work with
small hands combing through his hair affectionately.
“Good boy.” Mob praised him. Reigen was putty in his little dom’s hands, almost
purring from bliss.
It felt like years, but they had only been in this arrangement for a few
months, everything changed the day when Mob had discovered what Reigen really
wanted.
___________________________________________________________________
It was a rather boring day at Spirits and Such Consulting Agency, a weekday
evening at work. There had been no clients in the hour he’d been here after
school. And it didn’t seem the day would bring any more, seeing as the height
of clients was usually in the morning or early afternoon right after Mob had
gotten out of school.
With nothing better to do than pass time, Mob set to entertaining himself on
Reigen’s laptop. He was always free to use it whenever he pleased, so he didn’t
feel the need to ask for permission, Reigen sitting a few feet away from him.
As with most adventures through the internet, Mob had found himself in a maze
of multiple random sites. He was quite content with his prime choice of
spending the evening until he had tried to exit one of the twenty tabs open,
and accidentally ended up closing the entire browser.
“Oops…” he muttered to himself, hitting ctrl + h to open up… browser history.
Mob was an innocent boy in an innocent world, with a kind shishou who didn’t
exist out of his little bubble of good. It only made sense for Mob that Reigen
could have no stains. No temptations of the common man, nor desires that were
unproductive. Reigen was above all of those shenanigans.
Or so Mob thought. Until he opened up the browser history, scrolling through
the sites to pick and choose which tabs he’d reopen. At first nothing was out
of the ordinary. Beyond the websites he had been scouring was nothing more than
random pop up ads that his shishou must have accidentally clicked in between
articles about ghost canines coming back for their beloved owners.
‘Cute,’ Mob thought absently, curiosity getting the better of him as he
continued to scroll deeper despite already getting what he wanted. Nothing
stood out for him, most of the searches being related to things Mob had long
known about his Shishou. It wasn’t until he arrived at last night’s searches
that things took… an interesting turn. He had to trudge through the colorful
titles of dozens of pornographic titles, all coming from the same site.
“Punishtube.”
He absently stared up at his Shishou, the man sitting on the couch with a cup
of tea, absently thumbing through a book. He wasn’t even aware of the
discoveries Mob had made about him. And Mob planned to keep it that way.
Now, the natural answer as to how Mob could accomplish that would be “just exit
out and pretend you didn’t see a thing.” But Mob was a hormone filled 13 year
old, and no matter how innocent he was, there was no denying himself of this
curiosity to learn more about his shishou.
Given that Reigen was across the room, Mob couldn’t fully indulge himself in
this new side of Reigen he had yet to see. But he did mute the laptop and open
an incognito window, typing in Punishtube to see what in the world was going
on.
Porn. Pages and pages of porn was all Mob saw before exited out with a
flustered face, closing out of all the windows and slamming the laptop shut.
“Oi, Mob! Be careful with that thing, it’s importantly,” Reigen called out,
looking up from his book to give Mob a stern stare.
“Y-yes shishou!” Mob called back, sheepishly skittering away from the desk to
instead join his Shishou on the sofa. He’d have to play it cool for the rest of
the day, and hope the growing tent in his pants wasn’t painfully obvious.
----
It wasn’t until later that night in the privacy of his own room that he was
able to dig further. Curled up in the corner of his room with his laptop on his
crossed legs, Mob typed in the website from memory. Once again he was greeted
by a page full of porn.
But oh, it was not just any porn. Now, Mob wasn’t completely innocent… Sure he
had heard talk and seen glimpses of rather raunchy things around his
classmates. But to actually have videos right in front of him, thousands upon
thousands of extremely explicit video previews.
From what he could tell this was no average pornography. A far cry from the
normal nude breasts or - most extreme by his standards - PIV
penetration…Instead all previews featured men and women alike held down by
restraints. All sorts of devices were being used from butt plugs to open mouth
gags. Most of the people in the previews were frozen in screams of agony, tears
running down their face as the rest of them look just as battered.
Was… Was his Shishou into this? Such violent pornography - akin to rape in his
young, naive mind? Mob could hardly believe it. He didn’t want to believe. And
so… he had to prove it to himself.
After much deliberation, he finally decided to go further in his research. He
made the door and window were shut before curling back into his corned, laptop
faced away from the door. He plugged in his earphones and set the volume to the
lowest possible number that he could still hear.
He clicked the first video that caught his eye with a title that looked
familiar from his Shishou’s browser history. “Post orgasm torture with Ivan
part 4.” The preview featured a man tied to a chair, blindfolded and gagged as
he threw his head back in what Mob could only assume was pain. His platinum
blond hair stuck on his forehead with sweat.
Oh… Mob didn’t want to go through with this if it meant seeing unfortunate
people being put through pain. There was no way this could be anything less of
torture for these people! But Mob was determined, and the video had already
loaded.
The video wasted no time in diving right into the action. The restrained man on
the wooden chair was completely nude, his hard cock bouncing with every
movement he made. There were splatters of milky semen covering the man’s lower
belly, heaving in post orgasmic bliss. A gloved hand entered the frame - it’s
owner anonymous to the camera - and grabbed hold of the man’s erection.
The man immediately went into a fit trying to bend over himself. His pained
moans filled Mob’s ears as the man’s hips bucked, legs opening and closing
during his fit. But the off camera person was merciless and continued to stroke
the oversensitive cock that hadn’t even gotten the opportunity to go flaccid.
It continued without mercy for minutes without pause, the off camera person
cruelly squeezing on the reddened shaft, his other hand pulling on and twisting
the poor man’s balls. Mob held his thighs closer together. It was beginning to
startle him how such videos were out in the open.
Suddenly the most unexpected thing happened. The off camera presence leaned
into the frame, a mask covered their identity. His blond hair was the only
identifiable feature. He held a possessive hand to the tortured man’s balls,
finally freeing his cock from torture. His victim was slumped back on the
chair, panting through his wet nose.
“Do we need to stop, or are you still good?” Came the hushed question from the
man leaning into the other’s ear. “Remember, just start humming the national
anthem and we’ll be done. Do you think we need to stop for now?”
Was… was this man honestly asking his victim if he needed a break?
And even more unexpectedly, a whine escaped the restrained man’s lips through
the ball gag, and he shook his head no. He didn’t want to stop. And to prove
his point, he rutted his hips forward to encourage more attention.
“That’s my good boy, you’re doing such a good job today.”
And the torture, or at least what Mob had once assumed was torture, commenced.
At the sudden revelation of consent, Mob found himself staring at the video in
a different light. No longer did he see it as a horrible situation of rape and
fear. Instead he began to see it as a scene of deviancy, and most importantly,
trust. For if this man trusted the anonymous mask man to tie him down
completely to a chair and have his way with this, as he stood helpless,
blindfolded, and gagged. It took an incredible amount of faith.
And for this aggressor to actually take the time to stop and ensure that the
victim wanted more, was still completely on the same page, it took a
significant amount of respect.
So when the screams of pleasure commenced again, the off camera man stroking
and toying with his lover’s oversensitive cock, Mob couldn’t help but get
aroused. The boy bit his lips as he watched the way the restrained man
convulsed and thrust, tried to back away and get closer at the same time, and
even downright slumped into an unmoving limp state at points.
Mob had lost himself in the video, and before he knew it the man he once took
for a victim was orgasming again. Drool dribbled around his gag, entire body
straining as his hips bucked and tried to fuck the hand around him. And when he
orgasmed, nothing but a few pathetic drops of cum streamed out. He was
absolutely spent.
Mob could feel the tent in his pants touching the bottom of the laptop. He was
left to stare at the blank screen once the video ended, reflecting his own
shamed face back at him through the reflection.
Mob had a lot more research to do. And he did. After an extensive amount of
visual research via video after video of pornography, he finally looked at the
time and realized he had found himself three hours in the future. But instead
of finding the answer to time travel, he realized he had managed to spend three
whole hours watching porn, and occasionally rubbing himself over his clothes.
With much shame, he exited out of the porn window and instead finally decided
to do some actual research. After seeing the phrase repeatedly, he began by
searching into what BDSM meant in the first place.
The boy cocked his head curiously as he read through the acronym meaning.
Bondage. Discipline. Sadism. Masochism.
(D)omination. (S)ubmission.
Unable to help himself he proceeded to spend over an hour watching over youtube
introductions, articles, even the occasional blogs to find out all he possibly
could over the new subject that apparently his Shishou was so fond of.
And during the entirety of his research, the same question resurfaced over and
over again through Mob’s mind.
Which side of the spectrum was Reigen? Was he a dom that spoke to his demeanor
and stubbornness of life and business. Or perhaps the man was one of those
people who desired release from responsibility every once in awhile, and
shifted towards the submissive side. Maybe even both?
But there was no question in his mind as to what he himself was. It was obvious
in the multiple fantasies he had played out in his mind in the past few hours,
in which he was the aggressor and guardian to a sense. He was without a doubt a
dom.
So the question still remained. Where would Reigen fall?
---
It began with Mob subtly testing out different actions that were out of the
ordinary for him. His usual meek demeanor was a constant, especially with how
shy he was to even begin in the first place. But there was no helping the
underlying need he had to dominate his shishou.
It started out with small changes in his demeanor. He wasn’t disrespectful, or
even exceedingly pushy. But he tested out the waters with simple favors. He’d
ask Reigen to go to the local store for him to buy him milk instead of going
himself. At first Reigen was taken aback by the task, but he followed it
without a complaint.
Then progressed to Mob stroking Reigen’s hair, a funny sight to most bystanders
to see the barely 5’ boy reaching up to stroke the grown man’s head. Yet Reigen
wasn’t complaining. He even leaned down to accommodate Mob, making it easier
for the boy to freely pet him. It even became a natural part of their day. Mob
would randomly stroke and caress his head in gratitude whenever Reigen did
something that particularly pleased him. Eventually Reigen went out of his way
to repeat whatever actions earned him caresses, and downright expected them. He
would get visibly annoyed when he didn’t receive them.
Many parts of their daily routines received tweaks without any form of verbal
agreement. Mob became more confident in his actions, and Reigen easily fell
into a more subservient role. Reigen opened and closed the door for Mob out of
his own volition, always walked at the same - or slower pace, and even begun
going out of his way to ensure most of his actions were approved by Mob. He
made it less of a habit to randomly yank Mob out of his routine, and instead
began relying on Mob to accommodate the time for him.
It ended with a necklace. Mob had been saving his money for quite some time by
this point, and he had enough to buy a simple chain necklace from a department
store. It was perfect! A simple chain necklace that was thin, but sturdy enough
to not fall apart at a sharp tug.
He had gone straight into work after purchasing the necklace. He was smiling to
himself in anticipation as he walked the streets he’d memorized, the quickest
route to work. When he had arrived, Reigen was already waiting for him at the
lounge. The man was slumped back in one of the seats, a bag of bottled juice on
the coffee table between the seats.
“Hello Shishou,” Mob had greeted, shuffling over to Reigen’s side. The older
man immediately sat up to attention, straightening his back and smiling at the
child as he walked over.
“Hey, you ready for this evening’s job? I got some juice for you to take, but
we’re supposed to be there in an hour. It’s a long ride, so…” Reigen trailed
off, furrowing his brows as Mob stood beside of him instead of sitting down.
“Mob?” he asked, cocking his head.
“Shishou, I got something for you.” Mob dug into his sweater pocket, pulling
out a fisted hand with the necklace interlaced between his fingers. He held the
chain out for viewing, light reflecting off the edge as it swung.
“A necklace?” Reigen leaned in closer, bottom lip jutting out. He studied the
gift for a few moments before Mob pulled it back.
“Uhuh, just something I thought would look nice on you. Can I put it on for
you?” Mob asked, sheepishly smiling as he stared at Reigen’s neck.
Unsure of what to make of the gift, Reigen saw no wrong in accepting. “Sure…?”
he asked more than told.
Receiving all the consent he needed, Mob unhooked the chain and leaned forward
to wrap it around his neck. Reigen was face first in the boy’s upper chest as
Mob fumbled to re-hook the small connector at the back. After a few failed
attempts, the boy gave up and used his powers to instead fused the ends of the
chain together.
Reigen squeaked pathetically as he felt the sudden heat at the back of his neck
that only lasted for a moment, but was enough to fuse the necklace closed.
“Hey!” Reigen flinched away from Mob. He grabbed the necklace and held it out,
feeling it stuck around his necklace. It wasn’t short enough to be considered a
choker, but he wouldn’t be able to simply pull the chain off over his head.
Enough was enough. Reigen was able to play off just about every other
interaction, but this was just too glaringly obvious that something was up.
“What are you doing, Mob?”
Mob’s cheeks flared up and he paused, confidence dropping as he backed away.
But that was short lasted before he fisted his little hands up and stood his
ground.
“I… I know you like this kind of stuff,” he whispered. “I know you want to be
dominated.”
Reigen sputtered, backing into the couch and away from the child that was
literally coming onto him. “W-what!?” He finally blurted.
Mob swallowed the lump in his throat, “I saw… I didn’t mean to, but I saw the
type of videos you like to watch.” Mob hesitated for a brief moment before
stepping closer to Reigen, causing the man to sink into the back cushion
deeper. They both stared at each other with flushed cheeks, hesitating to speak
for different reasons.
“Mob, I have no idea what you’re talking about,” Reigen tried to laugh it off.
But his student was a stubborn boy when he wanted to be, and didn’t back off.
Instead he only got closer, leaning down to be face to face with him.
“Don’t lie,” the child said, reaching out to hold onto Reigen’s shoulders.
“It’s OK, because… Because I like it too, and I want to try it with you
Shishou.” And he had the audacity to climb onto Reigen’s lap, spreading his
thighs on either side of him to straddle the shell shocked man.
The boy pressed his hands flat against Reigen’s chest, sitting his butt down on
his lap. Mob could feel Reigen’s erection pressing against him. He relied on
his little physical strength to hold Reigen down, knowing that the man could
shove him off the second he wanted to, but he didn’t.
Mob pressed his ass against Reigen’s crotch, curiously wiggling his butt before
sheepishly smiling up at Reigen. “See, you want this too.” Mob leaned closer to
bump his nose against Reigen’s.
Reigen’s fearful eyes blinked slowly, and he couldn’t help giving the tiniest
rut upwards to rub himself on Mob’s butt. Mob noticed what he was trying to do
and didn’t give him the opportunity to, instead lifting his hips up along with
each rut Reigen gave.
“No, not until you admit it,” Mob said.
Reigen bit his bottom lip nearly drawing blood, shutting his eyes when he
realized just what he was doing. He slumped back into the couch and blinked at
the ceiling. Mob nearly thought he had gone too far, managed to ruin the
perfectly good companionship he had going on here, until-
“I… I want this, so bad.” Reigen held his hands over face, panting lightly
before doing a final pathetic rut up, this time rubbing right against Mob’s
crotch as the boy was too stunned to move away.
Mob licked his lips, releasing a sigh of relief at the positive reaction.
“That’s my good boy,” Mob praised, prying Reigen’s hands off. He dropped both
of their hands before leaning in for a simple, chaste first kiss.
___________________________________________________________________
 
During his reverie, Reigen had nearly fallen asleep on Mob’s lap, eyes shut and
breath slowing, nothing but his occasional blinks showing that he was still
awake. But Mob’s legs were starting to go numb, and he didn’t want to be stuck
here for the next couple of hours.
“My legs are falling asleep,” he muttered, prodding at Reigen’s cheek.
Reigen stumbled up immediate, hopping back onto his feet. Mob followed suit,
stretching as he rose off the couch. “How are your knees?” The boy yawned
absently, fists rubbing away at his eyes.
“Doing better, thank you,” Reigen answered, stretching out as well.
“And your throat?”
“A little more water and I should be okay. But how are you feeling?” Reigen
asked.
“Good,” Mob nodded, interrupted by the sound of his own growling stomach before
he spoke another word. Reigen stifled a laugh at the adorable look that crossed
Mob’s face, and absently looked at the clock.
“Oh man, it’s been awhile since we got back. We should eat something before you
get an upset stomach.” Reigen went to the grocery bags left beside the doorway,
carrying the plastic bag over to the coffee table before sitting down on the
couch. He looked at Mob expectantly before patting his lap as an invitation.
Having done this time and time again, Mob didn’t need to be told twice to
scamper over to Reigen and plop himself down on his teacher’s lap.
Reigen wrapped his arms around Mob’s waist and pulled him back until they were
back to chest. Mob relaxed, leaning against Reigen’s body as the man’s hand
were in front of him fumbling with the bags. Once he has managed to pull both
of their food and drinks into easy reach, Reigen unwrapped Mob’s nikuman,
prodding it against the boy’s lips until he took a good bite of it.
They fell into an easy interchange of eating, Reigen feeding the both of them
by turns, Mob occasionally reaching out to feed Reigen instead. Reigen loved
these days. To be able to spend the day just taking care of his little student,
master in it’s own sense, was one of his favorite past times. It means allowing
himself to fully sink into a subservient state and giving Mob everything they
both desired.
He allowed himself to preen under the peaceful lull that fell between them,
body on autopilot as he fed Mob. After much practice he had been able to
complete this action to near perfection - without the clumsy spills and drops
that came with the first few times. Sure, he himself was still a messy eater.
But he was good at feeding Mob. And doing such an excellent job always earned
him some praise.
Soon enough Reigen had finished his sandwich first, but Mob was not far behind.
Reigen rested his chin on Mob’s shoulder as he held up the bottle of milk to
Mob’s lips, watching him occasionally lick his small lips of milk drops. So
cute...
When Mob finally motioned Reigen to pull the milk away, Reigen capped the
bottle and set it back on the table. He absently stuffed the trash into the
still open bag on the table and checked his surroundings to ensure no mess was
left. But before he could complete a full scan of his own face of spare crumbs,
Mob had wiggled off his lap.
“On the floor,” Mob said, straightening himself out once more before pointing
at the floor. And not one to be slow with orders, Reigen didn’t question it as
he dropped to his knees. He winced at the initial sting of being on his knees
again, but it was nothing serious. Any thought of pain was over ridden by the
heavy realization that he had not been praised this time.
“You did fine just now, but you were acting up earlier when I specifically gave
you an order,” Mob accused, looking down at Reigen. The man’s eyes narrowed in
confusion, trying to figure out what he meant. “I asked you earlier to let go
of me when you were…” Despite all this time, that same childish charm remained
where he found it difficult to articulate perverse actions directly. “When you
had your mouth on me, and I needed to use the bathroom,” he settled on.
Oh… Realization dawned on Reigen’s features, and Mob shook his head.
“I don’t want you to get the wrong idea, so we need to teach you a lesson
before it becomes a habit to defy me.”
It would be a complete lie to say that Reigen didn’t feel himself get excited
at the threat. But he swallowed the lump in his throat, and put on a good face
of anxiety if only to stroke Mob’s ego. He was fully prepared for any
punishment.
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