
Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/10633179.
  Rating:
      Explicit
  Archive Warning:
      Graphic_Depictions_Of_Violence, Underage
  Category:
      M/M
  Fandom:
      モブサイコ100_|_Mob_Psycho_100
  Relationship:
      Hanazawa_Teruki/Kageyama_"Mob"_Shigeo, One_sided_Kageyama_Ritsu/Kageyama
      "Mob"_Shigeo
  Character:
      Hanazawa_Teruki, Kageyama_"Mob"_Shigeo, Kageyama_Ritsu
  Additional Tags:
      BDSM, Accidental_Voyeurism, Spanking, Clothed_Sex, Kink_Negotiation, But
      probably_not_enough_kink_negotiation, Safewords, Established
      Relationship, Plot_What_Plot/Porn_Without_Plot
  Stats:
      Published: 2017-04-15 Words: 2916
****** Paint You like a Canvas ******
by twitchtipthegnawer
Summary
     It was hard to call a hobby “harmless” when the entire point of it
     was harm. But really, Teru and Mob weren’t bothering anyone. It
     wasn’t like his parents cared if he came home injured, after all. And
     Teru knew from personal experience not to go too far.
     Neither of them had ever planned on Ritsu finding out.
Notes
     I wrote a super self-indulgent trashy sadist!Teru fic and… I didn’t
     honestly expect anyone to like it, except. Apparently people did, and
     wanted more, and I got a plot bunny, so. (Also huge thanks to my
     friends on mobtwit for giving me inspo!!!!!)
     Here we are, enjoy, please remember that these aren’t safe BDSM
     practices. (Though lord knows these are safer BDSM practices than
     what I expected. Teru just loves Mob so much… he’s so good…)
Ritsu didn’t give it much thought the first time it happened. Or, more
accurately, Ritsu didn’t give much thought to Mob’s lie. Why should he? “I got
hit by a car” was a plausible answer for someone like him. Anything less than a
car wouldn’t result in noticeable bruises.
The second time, though, when Mob walked through the door holding an icepack to
his black eye… well, how was Ritsu supposed to respond?
He thought it was injuries from work. Reigen was certainly incompetent enough
to leave Mob at the mercy of some strong, dangerous spirits. Or maybe it was
other espers? Just because Scar was gone didn’t mean that other assholes
couldn’t pop up.
Every time Mob came back limping, with a loose tooth or abrasions on his knees
or any other number of injuries, it was the day after he visited his friend
Teru. Ritsu had met Teru, and trusted him insofar as he was fairly certain Teru
wouldn’t go out and beat up his older brother at random. But he thought it was
a possibility that Teru was covering for Reigen and administering first aid to
Mob.
So he hatched a plan, and the next time Mob casually announced at dinner that
he was going to be spending the night at a friend’s house, Ritsu followed him.
To his surprise, Mob actually did go straight to Teru’s house, no detours to
Reigen’s shady office. Ritsu couldn’t very well follow Mob into Teru’s
apartment, but he didn’t have psychic powers for nothing. Hovering at the edge
of Teru’s living room window, Ritsu strained to see and hear what they were
talking about.
Whatever it was, it appeared to be  normal.  Mob was a bit twitchy, fidgeting
with his cup of tea incessantly, but he smiled almost as often as Teru did over
the course of their conversation. They sat together on the couch, slightly
turned towards one another, just  talking.  It was remarkably anticlimactic.
Ritsu was about to give up and go when Mob finished his tea and set it on the
coffee table.
It was like a switch had gone off in the room. Suddenly Teru’s expression was…
different. Ritsu didn’t know how to explain it, except that it set his gut to
churning. Mob led the way out of Teru’s living room, and for a moment RItsu
lost sight of them.
When he found the window to Teru’s bedroom, he was frustrated to realize that
the curtains were drawn. He could see a tiny sliver of the room, but that was
all. There was a flash of black - Mob taking off his gakuran? - and then white
as Mob’s t-shirt moved into view.
Then the entire world felt like it tilted on its axis as Ritsu saw Mob go up on
his tiptoes.  They were kissing.
Were they dating? Since when? Ritsu wanted to look away, knew this was private,
but his breath was coming faster and he couldn’t seem to -
A sharp cry pierced the barrier of the glass as a fist hit Mob’s vulnerable
side and forced him to the floor.
Ritsu didn’t even think. His reaction was simple, instantaneous fury. The
window to Teru’s room exploded inward, showering them both with glass.
Teru had a protective barrier erected around them in moments. Ritsu slammed his
fist into it, desperate to get to his brother, but he couldn’t even dent it.
Next to Mob Teru was nothing impressive, but Ritsu had forgotten that Mob
wasn’t the be-all and end-all of power. He gritted his teeth, unsure how to
rescue his older brother.
“What,” Mob said, his eyes wide with shock. “Ritsu? What are you doing here?”
“Rescuing you,” Ritsu spat.
“I don’t need rescuing.”
“I saw him hit you! Mob, you don’t need to protect him just because he’s your
boyfriend or whatever -”
Flushing, Mob shook his head. “I’m not protecting him.”
During their short conversation Teru had looked back and forth between them,
following the flow of it carefully. Now he dropped the barrier, though he still
watched Ritsu with no small degree of caution. “Why don’t you sit down?” He
asked as he began to gather the glass from the floor telekinetically.
Not knowing what else to do, Ritsu sat on the edge of his bed. Mob sat with
him, chewing his bottom lip absentmindedly. “I don’t know how to explain,” he
admitted.
“Maybe start with why he hit you,” Ritsu forced out through gritted teeth.
“Because I asked him to.”
The answer was so frank and unexpected that Ritsu could only stare. “Why?”
Mob squirmed a bit in place, chewing his lip again. It was more expression than
Ritsu could remember seeing on him in a long time.
Gently, Teru knelt by the side of the bed and took Mob’s hand in his own. “Can
I explain it?” He asked.
With a squeeze of Teru’s hands, Mob nodded. Teru turned to Ritsu, and his face
was much more serious than Ritsu could ever remember seeing it. “Shigeo enjoys
being hit, to an extent. We have a safeword to make sure that I never go past
the point where he’s comfortable.”
“Safeword,” Ritsu said dully. It was too much to process.
He knew a thing or two about BDSM. He’d only recently developed any curiosity
in it, but the internet was a wealth of information even when he wasn’t
specifically looking for it. What he’d seen online had been much more tame than
what he’d seen of Mob, though. Bruises were normal, sure, but on his  face?  So
thickly layered that he could barely walk?
“Are you sure it’s safe?” Ritsu found himself asking. He wasn’t sure where the
question had come from.
“We’re aware of the risks,” Teru said. It sounded like a cop out, and Ritsu was
about to say as much, but then Mob’s hand landed on his knee.
“It calms me down,” Mob said softly. “It helps me feel like my emotions are
easier to handle. Does that sound like a bad thing, Ritsu?”
“No,” Ritsu said grudgingly. “But how can you trust him to hurt you like that?
What if - I dunno, what if you try to use the safeword and he doesn’t listen?”
“Teru wouldn’t do that,” Mob said firmly. Teru gave him such a sickeningly
sweet look in response that Ritsu had to squeeze his eyes shut. He couldn’t
believe this. His big brother, so cool and powerful, in a messed up
relationship with a sadist who looked like he was practically  in love  with
Mob.
“Here, how about this. Would you feel better if we gave you the opportunity to
watch?”
This time both Mob and Ritsu turned to stare at Teru in disbelief. He shrugged,
but didn’t elaborate. And a piece of Ritsu was actually tempted. Maybe it would
help. But at the same time, if this was a sex thing, he couldn’t just watch Mob
- watch - He could feel his face heating up, but once again his mouth moved
without his permission.
“Yes, if Nii-san will let me too.”
For a long moment, Mob was silent. His voice, when he finally spoke, was even
softer than usual. “Alright Ritsu. Our safeword is poison. You can use it too,
if you need to.”
He couldn’t imagine why  he  would need to safeword if Mob was the one being
beaten up, but he nodded anyway. Mob got off the bed, pulling Teru to his feet
as he went. “Can we get started again? We were so close to…”
“I know babe, I know,” Teru said softly. “Grit your teeth.”
That was all the warning Ritsu had before Teru’s fist slammed into Mob’s cheek.
Mob went down hard, kneeling on the carpet with a surprised noise. Ritsu almost
expected him to shout  poison  right then, but all he did was wrap his arms
around his head.
Grunting with exertion, Teru grabbed Mob’s hair and kneed his face. Ritsu
jerked as the blow landed almost as though he’d been hit himself. He was
breathing hard again, a counterpoint to the way Mob’s own breaths had gone
wheezy and thin. Teru released him to let Mob fall prone, not sparing even a
single glance for Ritsu as he did. It was clear that all his focus was on Mob
even as he kicked at his stomach.
Next Teru went onto his knees, rolled Mob onto his back, and straddled him.
Mob’s hands went up to cover his face (Was it instinct? Fear?) and Teru caught
his wrists, pushing them back into the carpet roughly. “No, no,” he murmured,
all loving and cutesy, the way someone would talk to a baby animal. “Keep your
hands out of the way for me.”
To Ritsu’s shock, Mob swallowed hard and nodded. Ritsu decided he wasn’t going
to make any more assumptions about how things would go. He was clearly out of
his depth in all ways.
Still moving far too calmly, Teru pulled Mob’s shirt up and over his head.
There was a crazed light in his eyes, Ritsu thought, but he couldn’t really get
a good look at his expression. What he could get a good look at was Mob’s belly
and chest, and this time he was the one swallowing.
Red and yellow mottled the surface of his skin like carelessly splashed paint.
He was all half-healed bruises and brand new marks that hadn’t had the chance
to turn deep purples and blues yet. Despite himself, Ritsu kind of wanted to
know what he’d look like when the bruising really set in.
Teru was tutting while Ritsu stared, almost mesmerized. “You didn’t let
yourself heal up properly,” he admonished. “You know the rules.”
Miracle of miracles, Mob actually  whimpered.
“No more blows to your belly. And I’ll bet your legs aren’t ready yet, either.”
Mob averted his eyes. Teru nodded, as that was all the answer he needed, and
backhanded Mob across the face.
Gasping, Ritsu covered his eyes. He didn’t know why he felt the need to do
that. He’d seen worse. Hell, he’d  done  worse. But never to Mob.
When he dropped his hands they landed in his lap, and he realized he was hard.
He didn’t have any time to feel mortified before Teru was slapping Mob again.
And again. And again. Each blow rang out with a  crack  so loud Ritsu couldn’t
think around it. All he could focus on was the sound, and the dazed look on
Mob’s face.
The slapping stopped and Ritsu almost thought Teru was giving Mob a break. He
knew better than that, though. So he watched with nothing more than fascination
and a bizarre feeling in his belly as Teru dragged his nails down Mob’s sides.
They left raised welts behind, neat little sets of five that stood out angry
red on Mob’s milky skin. “You look adorable,” Teru said exactly what Ritsu was
thinking. He could feel the blush in his cheeks heat up even more.
Once again Teru scratched Mob’s skin harshly, making him squirm. He was wearing
blue nail polish, Ritsu realized; the color complimented the marks he was
leaving on Mob. Had that been intentional? How long had they been planning
this?
Suddenly, Ritsu had a feeling he was intruding on something important.
“Poison,” he blurted.
All at once Teru was off of Mob, helping him sit up and looking at Ritsu with a
worried expression. “What’s wrong?” He asked. “Do you need me to stop entirely,
or just a break?”
“A, um, break, I think.” His hands were shaking just the tiniest bit. He was
less put together than Mob, and he hadn’t even been hit once. Fuck, he was
pathetic.
“Ritsu,” Mob said. “It’s okay. Come here.” His words were slurred, but Ritsu
was helpless before them. He got off the bed and crawled to Mob, holding onto
him carefully. He didn’t want to aggravate any of his injuries.
Up close, he could see that Mob’s nose had begun to drip blood and his eyes
were teary. He felt a little better about being so affected, and he felt  much
better when Teru draped a blanket over the two of them.
“Do you want some water?” Teru asked. Ritsu shook his head, but Mob nodded, so
Teru handed over a water bottle. He sat across from them, watching Ritsu
carefully. “What made you safeword? I need to know so I don’t do it again.”
It was so hard to find the words to explain. Ritsu thought he understood how
Mob had felt being put on the spot, now. His mouth opened and closed silently a
couple of times before he straightened out the sentences in his head. “I felt
wrong watching. Like this wasn’t for me to see, even though you guys gave me
permission.”
“You didn’t have a problem watching when we didn’t know about it,” Mob pointed
out mildly. Ritsu bit his tongue and didn’t respond.
For his part, Teru had on a thoughtful look. “Maybe it would help more if you
watched from my closet? You might feel more hidden. Or, hmm.” He seemed to be
going over options in his head.
Something occurred to Ritsu, and once again he was speaking before he could
think better of it. “Hit me instead. It doesn’t have to be a lot, just. Let me
try it.”
As amusing as the complete bafflement on Teru’s face was, Ritsu couldn’t bask
in it. He was too busy stewing in nerves. But the question was out now, and
there was no way to take it back. He could only wait for Mob and Teru to give
him their answers.
Mob held Ritsu’s hand and nodded decisively. Teru huffed out a sigh, but said,
“Alright, let’s all get on the bed.”
That  did nothing to help Ritsu’s nerves, but Mob didn’t hesitate before
obeying, so he followed suit. Once he was on the mattress, he realized that it
was a much softer surface than the carpet. Teru was probably planning to be
gentle with him. Probably expected his pain tolerance to be totally weak.
Sitting at the edge of the bed, Teru gestured to his lap. “Lay across my knees.
You might want to hold Mob’s hand, too.”
Don’t underestimate me , Ritsu thought bitterly. But he kept his mouth shut and
did as Teru said.
Nothing could’ve prepared him for the blow to the back of his thighs. It was
muffled by his clothes, and he could squeeze Mob’s hand to alleviate the pain,
but that didn’t matter. All that mattered was that it  stung  and it wiped his
mind clean even more effectively than the sounds of those slaps had. He was
breathless, and didn’t realize that it was because he was making noise until it
abruptly cut off as he breathed in.
“Okay?” Teru asked. Ritsu could only nod. Apparently that was answer enough,
because then Teru was smacking his ass, hard enough to leave a lingering ache.
The strike rocked Ritsu forward in his lap, and -  oh no oh no his dick was
pressed against Teru’s leg, he would notice -
“Shh,” Teru soothed. “It’s alright. You’re doing well.”
His entire body felt too tense, his legs were trembling waiting for the next
blow, he was decidedly  not okay.
But he thought he understood the appeal, now.
If they kept going, there was a good chance Ritsu was going to come. He
realized it when Teru’s hand hit his thighs again, and his skin felt like fire
was racing under it. It was completely disproportionate to the blows he was
used to. A schoolyard brawl where he could protect himself with his powers was
one thing, but here he was expected to lay there and  take it.
“D-do you want to switch places?” Ritsu asked Mob, when there was another lull
in blows.
“Yes,” Mob answered immediately. He sounded almost  hungry . It was perverted,
and it made Ritsu shiver.
Teru was only too happy to let Ritsu crawl into his lap, and let Mob take his
place. He wasn’t shy about pulling Mob’s pants down to expose his ass either,
which made Ritsu wince just watching. Mob’s spanking was going to  hurt.
In the end, though, Ritsu didn’t need to safeword again. Mob actually moaned a
couple of minutes later (judging by the way his eyes rolled up, Ritsu almost
thought he’d come in his pants - but he needed not to focus on that right now),
and Teru decided that the scene was over. He took Mob into the bathroom to
administer first aid, then led both Ritsu and Mob into the living room for more
tea and blanket cuddles.
It wasn’t embarrassing like Ritsu had expected. It was almost natural, and he
thought some of that was the number of times Mob and Teru had done this now.
But some of it was also the way Mob was relaxed, the brightness in his gaze,
the freedom with which he reached out to touch Ritsu’s shoulder or Teru’s hair.
Ritsu didn’t think he was going to ask to participate ever again. And just the
thought of asking to watch made him squirm with embarrassment. But he also
knew, beyond a shadow of a doubt, that he wasn’t going to try to stop them
again. Whatever it was they had between them, it worked. And if it prevented
the monster inside his brother from coming out, well, all the better.
Maybe he could come back to watch without them knowing. Maybe.
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their work!
