
Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/2109840.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      F/F
  Fandom:
      RWBY
  Relationship:
      Ruby_Rose/Yang_Xiao_Long
  Character:
      Ruby_Rose, Yang_Xiao_Long
  Additional Tags:
      Rope_Bondage, Multiple_Orgasms, Half-Sibling_Incest, Enabler
  Stats:
      Published: 2014-08-09 Words: 951
****** Knots in Detcord ******
by ReasonableDaemonette
Summary
     Yang bets that she can break anything Ruby can build. Ruby interprets
     the challenge a bit differently.
Notes
See the end of the work for notes
It had started out as a simple challenge, for a simpler reason. Deep down, you
were kind of jealous. You had a combination of brute force, technique, and
speed that consistently landed you at the top of Signal's unarmed combat
evaluations But what you didn't have (probably never would have, if you were
honest) was your little sister's mind. She was a genius, even if she didn't
show it often, and you were eternally proud of her; but it still kind of
smarted that while you were failing your way through the prerequisite 8th grade
engineering courses she had already finished assembling Crescent Rose in her
6th grade AP Weapon Design course. So, after a little bit of thought, you joked
that you could break anything she could build.
You had expected a laugh, or blustering. Something along those lines. Instead,
what you got was quiet contemplation. Suddenly it was not your little sister
staring at you anymore. It was an engineer, evaluating a piece of uncooperative
material, and contemplating ways to bend it's stubborn nature into a thing of
beauty, and that sent an odd flutter up your spine that you could not
immediately identify.
Her first attempt was in rope, and while you scoffed at the idea that there's a
rope in the world that could hold Yang Xiao Long, you had to admit that the
resultant rope work was a thing of beauty. Your wrists were tied to a collar of
rope around your neck, carefully knotted at the front and out of reach of your
fingers. Rope looped through your elbows connected down to your lashed together
ankles, lifting your feet over your knees in a forced lotus position. As soon
as it was done, you started stoking your internal fires in preparation to
simply burn your way out, but you had to admit it was surprisingly effective.
And the way your elbows were pressing down on your already ample chest was
stoking a different sort of fire that you were currently trying very hard not
to think about.
"Stop."
The tone of command in the word poured ice water on the fire in your heart.
That was a tone of voice you had not heard from your sister before, and you
found yourself frozen in place, waiting to see what it said next.
"Let me guess you were about to go all 'raaaar fire puns Yang smash.'"
You spent a moment somewhat disappointed that whatever it was had faded from
her voice and she was back to standard cute Ruby, and then swallowed as it
suddenly returned.
"But let's pretend. These aren't ropes, they're chains. Not knots, but
manacles. You and I both know I could make that happen."
She leans down to whisper in your ear.
"Maybe I will, after this."
As she stands back up, she pushes you over, and you land face first on the
floor, your ass sticking up into the air. You're actually obscurely grateful,
because the look on your face would have told her that she had already found
the one way to restrain you that you would never fail; that tone of voice had
just thrown gasoline on the fire building between your legs. Obediently, you
attempted to roll your shoulders back, and the pain in your hips as your ankles
are pulled upwards curls your spine down, driving your face further into the
bed. Your attempt to recover failed when you tried to separate your elbows to
get your weight off of your face, as the rope in your cleavage cut into the
side of your breasts. Your spine arches in response, setting off an entire new
train of sensations as you tip over to side and begin to roll onto your back.
From your new vantage point, you see Ruby smiling down triumphantly at you, and
then her eyes widen as she realizes how you are about to land. Just before you
would have landed with your full body weight on a small section of your rounded
back, another order rings out in your little sister's voice.
"Yang! BURN!"
In instant reflexive obedience, you draw on your current strongest emotion to
power your semblance, and the fire between your legs leaps to a full inferno.
The pale reflection you manifest externally is still intense enough to vaporize
the rope, burn off all of your clothes, and leave scorch marks in slightly
gooey concrete. The blaze is nearly instantaneous, as you are way past your
natural levels of arousal, and it burnt its way out of you in a screaming,
spasming orgasm. Ruby, still afraid of some sort of spinal injury, jumps on top
of you to try and keep you from thrashing, but the rough impact of cloth on
extremely sensitive skin sets you off again, as you go multiorgasmic for the
first time in your life.
When you can finally see and think again, you find yourself wrapped around
Ruby, who is looking up at you from your cleavage with a blush somehow more
fiery than your own. She starts to apologize to you, but you pull her tighter
into your chest, and whisper into her ear.
"Definitely...make the chains...for next time."
A few months later, she tutored you through your engineering courses, and you
found yourself the proud owner of Ember Celica, a pair of shotgun gauntlets
composed primarily of a tungsten based high speed steel that not even you could
melt your way through.
And if a hidden compartment unlocked by a tiny key hanging off of Ruby's belt
contained attachment points for similarly high melting point chains, that was
no one's business but Ruby's and yours. You wore your manacles proudly.
End Notes
     If Ruby seems oddly serious/a bit OoC, it's because I was running
     with the idea that behind the cookies and goofiness is the highly
     skilled engineer that constructed Crescent Rose.
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