Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/9499775.
  Rating:
      Explicit
  Archive Warning:
      Choose_Not_To_Use_Archive_Warnings, Rape/Non-Con, Underage
  Category:
      F/M, Other
  Fandom:
      Dangan_Ronpa_-_All_Media_Types, Dangan_Ronpa:_Another_Episode, Dangan
      Ronpa
  Relationship:
      Towa_Haiji/Towa_Monaka, Monaka_Towa/Haiji_Towa, Haiji_Towa/Monaka_Towa
  Character:
      Towa_Haiji, Towa_Monaka
  Additional Tags:
      Rape, Underage_-_Freeform, Sibling_Incest, Half-Sibling_Incest
  Stats:
      Published: 2017-01-29 Words: 2091
****** Monaca's Big Brother Domestication Experiment ******
by BlueRibbonBow
Summary
     After Monaca's announcement that Towa City will be transformed into a
     paradise for children, she goes to visit her uncooperative half-
     sibling.
     Commissioned by anonymous as a fill for the kink meme!
Notes
     This fic was commissioned by someone who wishes to be anonymous, and
     I had a lot of fun with it!
     So heed the warnings, etc. etc.
See the end of the work for more notes
When the first Monokuma model was built, Haiji thought about having a cease and
desist switch built for them in the lab that produced it. Just to be safe.
Their claws were a solid foot long and could slice metal with ease, which could
pose a dangerous problem should any of them malfunction.
But Haiji had shrugged it off back then, told himself it wasn’t his problem
since he had never planned on investing himself in the project.
If his dad was going to let Monaca do whatever she wanted and build these weird
creatures, then he could suffer the consequences when an accident happened.
It was what he’d get for being so careless. For catering to  her . Haiji
secretly hoped it happened one day, that Monokuma would maul a man on the
assembly line, if only to prove a point.
Haiji realized now that he was the careless one, and that he should have had
that switch built.
If he had, he wouldn’t have been taken so off guard by Monaca’s broadcast on
television, or by the hordes of Monokuma roaming the street murdering people.
It was something out of a children’s horror cartoon.
Towa City had never seen such disaster.
There was only one thing that he, Haiji Towa, could possibly do--get off the
island as soon as possible.
He wasted no time grabbing a few wads of cash kept in the bottommost locked
drawer of his desk, a satchel to stuff it in, and a handgun he’d bought from
the black market. He knew it’d be useless against a Monokuma, but the the gun
wasn’t for for them.
It wasn’t something that he’d wanted to do, but in times of such violent
crisis, people turned into animals.
Just as he was packing up his laptop, a prize full of anything and everything
Towa Industries wouldn’t want the public to see, his door flew off the hinges.
Standing in the middle of the two Monokuma responsible for punching it in was
no other than Monaca in her wheelchair.
“Nii-san!” She declared cheerfully, the motor in her scooter humming as she
approached him.
Haiji backed away from her until his neck touched the window. His office was a
good hundred or two feet off the ground. He wouldn’t make it out that way, and
for a split second questioned why he didn’t just throw her out of her chair and
make a run for it.
Whatever she wanted with him, he didn’t care. This was all her doing.
And he  wasn’t  her Nii-san.
“Nii-saaaan,” she repeated, puffing her cheeks brattily, curling her hands up
into fists.
He noticed that in her lap was a remote controller, one that he’d seen her use
before.
Two Monokuma trailed behind her, and ran behind Haiji before he could decide on
fight or flight.
One hit him in the back of the head--hard--and sent him tumbling over to the
floor.
Monaca stood up from her wheelchair (he knew she’d been faking!) and sniffled,
wiping her eyes. “Monaca is sorry it has to be like this…”
The Monokuma grabbed at him again and set him back in his chair, paws carefully
holding his arms behind his back.
Monaca looked away from him, her eyes actually welling up. “Monaca wanted to
tell you before, but...now she has to hurry because a few things messed up her
plans...but that’s okay!”
She reached into his desk drawer, fetched some duct tape, and began promptly
wrapping it around his mouth. “Monaca wants to build a paradise for all
children, you see, but she’d like to include you too...b-because….she loves
you...but up until now, you’ve never looked at Monaca despite liking younger
girls.”
She wiped her eyes with her sleeve and stepped away, back facing him, placing
the controller on a table. He thought that if he had any shot of getting out of
this, it would be right now.
But one Monokuma was holding him back and another had blocked the only door in
his office.
Monaca turned back to him, a smirk stretched across her face. She approached
him more closely and pointed directly down to his crotch, where Haiji’s
unwilling hard on was protruding from his pants.
“That spill about ‘Monaca loves even that about you’ defiiiinately got you
hard!” She pressed her hand into his dick, forcing him to moan behind the duct
tape encircling his mouth. “Even though you were totally looking over at the
controller and thinking about escaping from our quality time together…”
He clenched his eyes shut, and Monaca gave his cheek a hard slap with her free
hand.
It stung and reminded him that, unfortunately, this wasn't a dream.
“Hey,” her voice lowered. “You’re not allowed to pretend like you don’t enjoy
this...when I’ve seen you ogling and touching girls younger than you all the
time…Nii-san is a pervert!”
Haji didn't think he was a pervert just because he liked younger girls.
Regardless, there wasn’t enough money in the universe to pay him to ever pursue
the one in front of him right now.
Not only because she was too young for his taste, because Haiji had decided
right then and there that he would kill this brat as soon as he could.
She knew exactly what she was doing.
Monaca giggled, resuming her usual upbeat persona, and unbuckled his pants with
her tiny fingers, and the weight of her arms resting on his thighs made his
cock twitch.
To his relief, she didn’t notice or didn’t care, and was much more focused on
yanking his boxers down just enough to free his dick. Monaca seemed proud of
herself and sneered as she poked the bulbous head with her index finger.
“Nii-san, think of how many other older brothers fantasize about playing with
their little sister like this...Monaca has made you quite the lucky man today!”
She stared at his sex for a few moments, making some comment under her breath
about how it was thicker and bigger than she’d thought, punctuated with a
devious giggle.
Haiji was sweating. He didn’t want this in the least, knew this was walking on
thin ice even for him (even with this not being his fault, he reminded
himself).
Letting go of his dick, she took a step back and kicked off her shoes, then
reached down to the hem of her dress and pulled it over her head. It took a few
tugs to get it off completely, and when she did, she loosely tossed it onto the
floor.
Monaca wasn’t wearing a bra, he noticed, not that she would need to.
Her breasts hadn’t started growing yet, but there was a slight perkiness to
them, and her skin looked milky smooth.
Her socks stayed and stretched up to her thighs, and between them was her
hairless, pink pussy. She hadn’t even been wearing panties to begin with.
He hated how soft she looked. Hated how appearances were so deceiving.
Monaca noticed his staring and giggled, standing upright with her hands behind
his back to shamelessly give her a full view of her body.
“But you know, Monaca really does love you, Nii-san,” she said. “She wasn’t
lying about that part…in fact, she wanted you to join our campaign...the
Warriors of Hope...we need a Nii-san, but if you’re not willing to play the
part...Monaca will have to earn your affection the only way you know how to
give affection to cute girls.”
She hoisted herself up onto his lap, straddling his knee, and grabbed at his
dick with both hands since she couldn’t wrap one around it completely.
Haiji watched her, the weight of her body on him and the coolness of her skin
going straight to his crotch. He was hard and he hated it, but he didn’t want
her to stop either; he settled for telling himself that it didn’t matter
whether or not he liked this, because he was powerless to do anything about it.
“Nii-san, if this goes really well, Monaca will use her mouth later if you
like!” She pulled herself even closer to him, so that she could stand on her
knees and hug his neck super tight. She sighed contently, feeling up his chest.
“You’re so handsome like this, Nii-san...so excited...Monaca wonders how long
you’ve looked at her this way!”
She giggled and kissed his cheek--just a peck--then moved onto his lap and
grabbed his dick again.
“Geez, you’re so big...will you even fit?” Monaca rubbed the head against her
pussy, which was way too soft and warm. Haiji thought that surely his dick
wouldn’t fit, and that she had finally bit off more than she could chew.
No, he  hoped  he would break her. He wanted to see her crying, pride wounded
because she was still just a spoiled kid and deserved to know that not
everything would go her way all the time.
She lowered her body, slowly, guiding him into her as she gasped too sharply to
be faking.
“Nnn…” Monaca bit her lip and continued, the tightness of her insides clamping
onto his cock and squeezing.
Haiji was moaning from underneath his duct tape, and the sweat was actively
dripping down his forehead and itching.
Monaca’s lips slightly parted as she moaned again, pushing more of him inside
of her, until finally she had half of his length sheathed. Her eyes half
lidded, there was a certain blush on her face that could have been cute if she
wasn’t such a monster.
He bit the inside of his cheek, feeling how her walls contracted against him.
Monaca tried to force more of him into her, descended her hips ever so
slightly, and immediately froze and whined when he went as far as he could.
“Aww...it won’t go any further…” She whined, swaying her hips back and forth
for emphasis, forcing him to hit her cervix over and over again.
Haiji groaned as she slowly lifted herself, slowly, only to lower herself back
onto him, then repeat, this time increasing her pace just enough to notice.
With every movement, he was fucking his half sister and she was laughing under
her breath. Monaca’s fingers latched onto his shoulders and she dug her tiny
but sharp nails into his skin as she rode him.
“Monaca...loves her Nii-san...so much…” she breathed, satisfied with how the
words made him twitch inside of her.
Despite how good it felt, despite that this was the tightest pussy he had ever
been inside, Haiji couldn’t help but wonder how this wasn’t breaking her--how
she wasn’t even bleeding (because girls were always supposed to bleed their
first time, right?). It was as infuriating as it was carnal.
She continued on like this, licked the side of his neck and even bit down ever
so slightly, and it didn’t take long for him to cum.
Haiji shut his eyes and cursed himself, the heat in his stomach unsubsiding. He
was trembling against his will.
Monaca pushed him as deep into as he would go and took a long, relaxing breath
as his cum spurted into her. She hugged his neck and rolled her hips forward,
helping him ride out his orgasm.
“Nii-san…” she mumbled. “That was great...we make a great team, don’t we?”
All too quickly, she sat up, and he watched in numb regret as she unsheathed
his cock and a thick stream of semen dripped out from her swollen pussy.
She let it stain the crotch of his pants, then hopped up and promptly started
to get redressed. He watched her, the afterglow of his orgasm subsided. His
head was filled with regret.
It’s not like I wanted this...it’s not like I wanted this…
Monaca, now fully clothed again, approached him and ripped the tape off his
mouth, taking a few stubbles from his chin with it. “So, Nii-san...what do you
say? Will you stay in Towa City and help Monaca build her paradise?”
She awaited his answer with big, yearning eyes and a loving smile.
Haiji gasped, breathing in through his mouth for a few seconds.
He spit at her. “Go to hell.”
Monaca’s face darkened. “You’ve left Monaca no choice, then.”
She pranced over to the table just as cheerfully and retrieved the Monokuma
controller.
With a press of a button, the Monokuma holding Haiji back took a paw, wrapped
it around his forearm, and snapped the bone in half.
End Notes
     Thank you for reading!
     (If you're at the end notes here because you're gonna leave me a smug
     comment or tell me I'm gross, I don't care and your resistance makes
     my penis harder.)
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