Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/9095314.
  Rating:
      Explicit
  Archive Warning:
      Rape/Non-Con, Underage
  Category:
      M/M
  Fandom:
      モブサイコ100_|_Mob_Psycho_100
  Relationship:
      Kageyama_"Mob"_Shigeo/Reigen_Arataka, Dimple/Reigen_Arataka
  Character:
      Kageyama_"Mob"_Shigeo, Reigen_Arataka, Dimple_(Mob_Psycho_100)
  Additional Tags:
      Possession, technically_a_threesome, Rape
  Stats:
      Published: 2016-12-28 Words: 3527
****** Good Things Cum To Those Who Wait ******
by MerryGoat
Summary
     Reigen is a sick man. He can’t control the lust he feels for his
     disciple, and after years of suffering in silence, he doesn’t want to
     stop himself anymore.
     Enter Dimple. His one chance to cure himself. To finally get rid of
     all these less than holy thoughts, and at last release them all in a
     single act. All the green blob had to do was possess Mob and let
     Reigen have a single day to fulfill his urges.
Notes
     Another really snazzy kink meme prompt~ this and more really awesome
     prompts and fills can be found right over here, https://mp100-
     kink.dreamwidth.org/
     One note: this takes place just right after Reigen meets Dimple for
     the first time.
     and remember to head the warnings. RAPE AND UNDERAGE.
See the end of the work for more notes
Reigen was a bad adult.
“You really are a sick bastard,” the green snot bubble said.
Reigen didn’t need to be reminded of that fact, but it only felt so much more
silly coming from a strange little blob he had only met days ago. He had just
barely convinced himself it wasn’t some sort of strange hallucination. But Mob
confirmed is was real. So… He may as well take full advantage of this new
asset, and ask for a simple little favor….
“I know, I know,” Reigen waved off, trying his best to seem confident. “But can
you just do me a solid and do this for me? I won’t ask you for a thing again,
you have my word,” Reigen raised his palm to the air, his other hand over his
chest in a swearing in position.
“It doesn’t seem like a good idea, I don’t even know how to possess the kid!”
Dimple ranted mid air, bobbing up and down with each word.
“Look, I’m just saying to try,” Reigen insisted, “And really, worse case
scenario is he just can’t sit for a few days.”
There was a moment of silence while Dimple looked off into the sunset,
contemplating his options. And then he shrugged. “Not like I have anything
better to do nowadays,” he finally relented. It’s not like he had to take care
of Shigeo, he didn't care about him or anything… B-baka…
However there was only one very important thing left to figure out. How in the
world was Dimple going to finally break the barrier, and possess Shigeo so
Reigen could have a go at the kid’s ass.
------------------
It was just another afternoon for Reigen, typing away at his computer while
trying to pass the time. It was always incredibly boring before Mob came into
work. He had to stop himself from checking the time multiple times per minute,
and instead mindlessly searched online to pass the time.
He couldn't help but get excited when he finally heard the door open, the quiet
patter of light foot steps making their way in. He looked up from the screen to
greet his disciple, already preparing a full run over of the day they had ahead
of them. However, his words were ripped out of his mouth when Mob finally
entered his vision.
‘Oh my god…’
Mob was standing across the room, standing perfectly still, giving Reigen a
full view of himself. Reigen twitched. The kid was still in his goddamn P.E.
uniform… white shirt neatly tucked into his red shorts. Shorts which were hiked
up much too high, leaving barely anything to the imagination as his groin was
pressed against the fabric.
Before Reigen could even find his breath, Mob began to saunter over across the
room. Reigen followed each sway of his hips like a pendulum, unable to even
find the shame to stop.
“Reigen shishou~” Mob purred out, finally ripping Reigen out of his hypnosis.
Finally catching his train of thought again, Reigen forced his eyes away from
the boy’s body, and finally met him eye to eye. It was then he noticed the
peculiar red spots on each of his cheeks….
“Mob?” He finally coughed up, mind turned to mush.
Suddenly the little incubus started cackling, holding his stomach with one hand
as the other pointed accusingly at Reigen. “Hah! You idiot, it’s me!”
And it clicked.
“Dimple!”
“Yep, finally got a chance to wear this meat suit.” The spirit wearing Mob’s
flesh said. "Shigeo was down with the flu, hadn’t been up all day. I still
can’t believe it actually worked... And I gotta say, it’s really comfortable,”
he said, giving a twirl to show off his body. “So please be gentle on the ass.”
Reigen didn’t have to be instructed to do a thing. Mob’s body was his for the
taking, and he’d be damned if he waited a second longer to finally fulfill the
fantasy he had held on for years.
Dimple was happy with staring down at himself, flexing his arms and legs
curiously while he tried to get the hang of it. His test run was cut short when
he was suddenly lifted off the ground, body draped over Reigen’s shoulder as
the man fast walked to the couch.
“Hey, slow down! We get all day, at least treat me to a meal,” Dimple
complained, but Reigen wasn’t hearing it.
Reigen tossed Mob’s body onto couch, losing control and dropping any romantic
and slow fantasies he had playing in his mind for the past few years. With so
much excitement it was beginning to feel impossible to even try to prepare the
Mob.
“Shishou! You’re being too rough, please be gentle with me,” The possessed boy
whined as Dimple had finally gotten to playing into his role.
“I’m sorry Mob, I’m so sorry,” He muttered, dropping to his knees in front of
Mob. His student was sitting on the couch, legs spread on either side of
Reigen. He put his hands on Mob’s legs, thumbs massaging his inner thighs as he
pushed them farther apart. The boy’s small cock was soft, but visibly pressing
against the red fabric of his shorts.
“I’ll be slow, I promise,” Reigen muttered.
Mob started rocking his crotch up and down in a gentle humping motion, watery
eyes looking down at him in pure need. “If you’re going to be such a brute, at
least touch me too…” Mob said, voice higher than usual. He dropped his hand to
his crotch. “Right here....”
Reigen felt awe at the scene in front of him, and he dropped the fact that this
wasn’t really Mob to the dumpster. Even if he knew this wasn’t Mob, it didn’t
matter for him right now. He had asked for this. He finally got it. There was
no shame in indulging himself into this fantasy completely, if only for today.
For now, this was Mob. And right now, that little boy slut was practically
begging to be fucked.
Without even asking for permission, the little minx made a disgruntled noise
and dropped his hands to his shorts. He began shimmying them off himself,
panting and wiggling his hips to get them off. But Reigen was a cruel man. He
batted his hands away, and pulled those tiny little shorts right back up.
“Shishouuuu, stop teasing me,” he whined.
“Ah - ah - ahhh,” Reigen smiled, “Good things come to those who wait…”
Mob furrowed his brows in annoyance, but he crossed his arms and looked down at
Reigen. A look of annoyance was clear on his face, and it made Reigen’s heart
thump. What a desperate boy.
Eager himself to get things on, Reigen finally lowered himself. He grabbed both
of Mob’s legs, chuckling at the tiny squeak of surprise that came out of the
boy’s mouth, and propped those milk white thighs on top of his shoulder. He was
in full view of those bright red shorts, gyrating and tempting him to just eat
him alive.
Reigen dropped his face between Mob’s thighs. He paused for a moment to
appreciate the smell of young cock pressing against his nose, and he didn’t
resist inhaling deeply. Mob whined, but held onto Reigen’s head to keep him
from even daring to back away.
Reigen pressed hot, open mouth kisses on Mob’s clothed crotch. He licked,
sucked, even nipped a few times to get a funny sound out of Mob. There was a
disgusting sense of pride in himself as he finally felt that cute cock get hard
against his lips, and Mob’s plush thighs holding his face in place. He could
even taste a lingering salty tang of precum beading out of the boy’s cock.
By the time he raised his head back up to get a view of his work, Mob’s entire
crotch was dampened with a mix of saliva and semen. The outline of his cock was
obvious, all 4 inches of that childish erection straining against his shorts.
“Fuck, I can’t take it anymore,” Reigen grunted, throwing Mob’s legs off of his
shoulders at once.
“Hey, be careful!” The boy scolded, but Reigen drowned out any further words
with a kiss. A desperate, yet chaste kiss against the lips that sent Reigen’s
mind to heaven.
Mob gasped against Reigen's lips when he pushed himself between his hips. He
rubbed his erection against Mob’s plump ass, breathing hard against his lips.
“See what you do to me?” Reigen’s hands dropped to hoist Mob’s hips up and
directly against his crotch. “You have to take responsibility now.”
And “Mob” grinned, a haughty look in his eye for a few seconds that left Reigen
sick. But the look disappeared as soon as it came, and his little Mob was back.
Shy, bashfully looking between the both of them. “I… I will make sure to take
care of it then,” he whispered before pressing his hips down.
Able to quickly throw away the temporary lapse in character, Reigen decided to
get things over with quickly. He finally grabbed onto Mob’s shorts and pushed
them down with a single tug. He leaned away to be able to pull the shorts right
off his legs for him. There was no need to pull off the boy’s underwear. He
wasn’t wearing any.
“God, such a desperate little boy aren’t you?” He groaned, dropping Mob’s legs
on either side of himself. There was a clear view and reach for Mob’s entire
cock, balls, and ass. A holy choir played by a band of demons was circling his
mind at such a wonderful opportunity.
Mob pouted at the light insult, but didn’t waste time as he lifted a single
hand in the air. There was the sound of a single drawer opening, Reigen
flinched when a rush of air flew past him. In an instant there was a very
familiar bottle in Mob’s hand…
“So this is what you use to fuck your own hand, isn’t it ya old creep,” The
creature in Mob’s unconscious body teased. And Reigen felt his cheeks warm up
in both shame and excitement.
“Tell me, do you think about this when you jerk off?” Mob wondered out loud, a
little wiggle of his hips to show Reigen what he was talking about.
Reigen nodded his head desperately without a single second of thought, licking
his dry lips as he waited.
“God, you’re gross… but whatever,” The possessed boy sighed, turning the lube
bottle upside-down. He popped open the cap and squeezed the bottle until his
hand was dripping in the sticky substance. His hand wandered down between his
own legs, and he slathered the lube down his ass.
“Have at it,” Mob finally said, lifting his hand back up and giving Reigen full
access.
That overconfident smirk on Mob’s face disappeared the moment Reigen shoved a
finger right up his ass. The boy squealed, collapsing back to his shy and needy
facade that Reigen was in love with.
“For such a big talker, you can’t even take a finger without becoming a mess…”
Reigen murmured, the force of his hand managing to jerk Mob’s entire body up
and down with each push of his hand. He was so tiny…
“Sh-sh-shut uuup,” Mob whined, but had no complaints as Reigen curled his
finger as he attempted to find the spot inside of him that would…
“Reigen!” Mob squealed, drawing his legs up to his chest in panic at the new
sensation.
“There we go, see how fun it can be when you just let me do the work?” Reigen
smiled, pushing Mob’s legs back down so he could see that adorable flushed
expression, and his leaking dick.
Giving himself permission to be a little more reckless than he’d want to be,
Reigen introduced a second finger. Reigen worked his fingers deeper, pumping
them in and out of Mob’s hole. The lewd sounds of whimpers and squealshing
filled the room as Reigen stared at his handiwork. He couldn’t resist dropping
his spare hand down to his hips, palming himself over his pants. Carefully, he
slipped his button off and unzipped his pants. Mob let out a particularly loud
moan as Reigen pulled down his zipper, and finally got some relief from the
tight confines of his clothes.
After finally being able to squeeze three fingers inside, Reigen decided it was
enough. Sure, a few minutes of rough finger fucking isn’t really ideal... But
it was at this moment that he was able to use the fact that this wasn’t really
Mob to his advantage. The boy wouldn’t feel a thing. He’d be a bit sore for a
while, but Reigen would make sure to leave Mob nice, clean, and even offer him
a free massage when he comes in tomorrow for work and inevitably complains of
soreness.
“Reigen…” He suddenly heard, just before feeling two arms reach up to wrap
around his neck. Reigen looked down at the boy clinging onto him, tears rolling
down his cheeks his face. “Please, fuck me.”
God. Damn.
“Gladly,” he answered, not feeling a moment of hesitation as he pushed down the
waistband of his boxers to release his hot and heavy cock. Mob stared wide eyed
between his own legs, a tiny twitch coming from his own erection as he eagerly
spread his legs further… Oh, this kid would surely be the death of him.
In his attempt to take it slow for the first time this night, Reigen leaned
over Mob’s body and gripped his butt tightly. He gave it a light squeeze before
finally pushing his hips forward, the head of his cock pushing between lube
coated cheeks. Reigen bit his lip, surprised how such little stimulation could
excite him so much.
But Mob was having none of this slow and patient shit. For just moments later,
Reigen felt those soft legs wrap around his hips, and push him right into the
child’s ass.
Somehow, Reigen screamed before Mob.
“Holy fuck, god, shit,” Reigen blabbered as the sudden pressure surrounded his
cock, twitching and pulling him in deeper.
“Ah, ahhhn, shishou i-is too big…” Mob moaned, but didn’t stop from grinding
his hips down. And Reigen felt every one of his fantasies rise up in his chest
as he gazed down to see mob, stuffed full of his cock, begging for more.
Lube smeared on Mob’s hips as Reigen’s wet fingers gripped his sides, angling
his ass towards himself for a deeper reach. Once in a position that made him
most comfortable, Reigen released any thought of hesitation and rammed his cock
into Mob.
Reigen groaned low in his chest, appreciating the tiny gasps and murmurs of
nonsense coming out of Mob’s mouth. He held himself perfectly still before
finally beginning to rock back and forth, Mob’s hips swaying along with him. It
was amazing.
Reigen dropped his head between Mob’s shoulder and neck, breathing in the scent
of his student. He could hardly believe this was reality. It was almost too
good to be true.
But the sudden sensation of Mob’s hips trying to bounce themselves against his
hips were enough to remind him, yes, this was real. And he had to focus to make
this time count, and fuck Mob absolutely silly.
Not even thinking about asking permission, Mob dropped a single hand to his own
cock. It was small, hard, and adorably bouncing against his lower stomach with
each thrust Reigen gave. The boy eagerly wrapped his fist around his twitching
dick, rocking his hips back and forth to fuck himself on Reigen, and fuck his
own fist.
Unable to reprimand him for such an amazing sight, Reigen instead helped. He
wrapped one hand around Mob’s fist, helping him hold himself tighter,
encouraging him to fuck himself faster. And Mob was losing it. Drool and tears
rolled down the side of his face from pure over stimulation. The boy’s body had
never experienced anything beyond the touch of his own curious hand, the
occasional helpless little ruts he’d do against his sheets. His body was so
sensitive, so easy to please.
Mob was moaning like a wanton whore and eagerly trying to bounce himself faster
against Reigen’s dick. There was no announcement as his fingernails dug into
his back, soft legs wrapping around his waist to force Reigen deep into his
ass.
“Cumming, cumming, cumming,” Mob muttered to himself, and Reigen was going
insane with the amazing contractions that tight little ass was doing around his
cock. He felt like he was melting inside of him, and he couldn’t hold back much
longer.
Mob held his breath as he finally came, small erection twitching with each rope
of cum that hit Reigen’s shirt and dripped down to his belly. He was winded,
and lost all his strength at once as he released his tight hold on Reigen.
He could have cried at the amazing view he had. Mob, tuckered out and watching
him through narrowed eyes after being well fucked. It only encouraged him to go
harder, faster, forcing all kind of wonderful sounds out of Mob who was
struggling to keep his eyes open. But Reigen didn't let him rest yet, and
instead continued to fuck his hole raw. Luckily for Mob's body, it didn't take
much longer for Reigen to finally cum inside of his disciple, plunging himself
deep inside. His hips stuttered with each pulse of cum that shot out of him.
Reigen wasn’t able to held himself up much longer either. He was spent after
the most amazing orgasm of his life, and had no need to do anything else. He
collapsed on top of Mob, careful not to crush him, and took a deep sigh.
“Mob,” Reigen whispered, “You are so good to me…” All that was left was to get
up, and treat Mob’s body to a nice bath and meal. Maybe he’d even beg dimple to
stay inside mob until night time. He could treat the boy to a cute little date,
full of kisses and cuddles. Just something to remember for the rest of his life
since he wouldn’t have a chance to do this again.
As Reigen came down from his haze, he suddenly felt Mob’s hands touch his
shoulder. They were slow, hesitant... he was shaking. Mob's slow, satisfied
breathing came to a complete halt against his ears. And even if he hadn’t
looked yet, Reigen was nearly entirely sure those rosy spots on his cheeks were
gone as well.
“What… What’s going on?”
Fuck.
The hands which were just embracing him were suddenly digging claws into his
shoulders, desperately trying to cling on and push at the same time. Reigen
didn’t resist. He let the squirming boy under him push him off, and finally
slid his wet cock out of the kid’s abused little hole.
The screams were immediate.
“Shishou! Shishou, it hurts, it hurts so much,” Mob sobbed, eyes shut as the
legs which were just wrapped around Reigen’s waist, begging him to go harder,
were now curled up to his stomach.
“Mob, wait, don’t move,” Reigen tried to help. He scrambled up to his feet,
rushing to pull his pants back up. He ran to his desk to collect tissues, the
only thing he could get his hands on that would help. Or at least, clean the
mess up a little.
When he came back to the sofa, Mob was staring right at him. He was curled up
on the couch, holding his own stomach as his wide eyes studied Reigen.
Confusion was replaced sudden understanding. And that turned into pure fear.
“What did you do to me…” He whispered, shaking in a puddle of lube, semen, and
blood.
“It’s not my fault, I didn’t… I…” Reigen scrambled to find the words in his
brain to correct the situation. But it wasn’t needed. It was clear Mob knew
what happened. There was no way to back off now.
“I’m sorry Mob,” He apologized, dropping to his knees again in front of Mob.
“You… You weren’t supposed to…” He was expecting an entire day to correct his
actions. To be able to lovingly clean Mob back up, massage and heal his tender
ass, maybe even get him a gift. He wouldn’t know, and he’d come out of the
experience with something nice.
Mob didn’t respond. Tears were streaming from his face, but there wasn’t a
single readable emotion on his face. Reigen had gotten better at noticing Mob’s
tiny facial cues, but now… He couldn’t see a single thing.
“Look, just… Let me clean you up, you can take a bath at my place even, I’ll
buy you some dinner… Yakiniku even!” He tried to bargain, desperate to get some
kind of reaction.
Instead he was met with silence.
But despite this, much to Reigen’s surprise, Mob let go of his legs. He stared
right at Reigen as he unfolded himself, and sat down on the couch in a normal
posture. His face was screwed in an expression of pain, and his tummy was
visibly convulsing. But he didn’t say a word. And neither did Reigen, as he
finally tried to clean Mob up.
End Notes
     And then they lived happily ever after... o.<
     thank you for reading! Titter with me on twitter @Octo_piss
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