Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/996757.
  Rating:
      Explicit
  Archive Warning:
      Rape/Non-Con, Underage
  Category:
      F/M
  Fandom:
      Katekyou_Hitman_Reborn!
  Relationship:
      Sawada_Tsunayoshi/Xanxus
  Character:
      Sawada_Tsunayoshi, Xanxus
  Additional Tags:
      Tsuna!slave, Dubious_Consent, Alternate_Universe_-_Gender_Changes,
      Alternate_Universe_-_Canon_Divergence, Lemon, Concubinage, Underage_Sex,
      Remix, Heterosexuality, Stockholm_Syndrome, Possessive_Sex, Possessive
      Behavior, Blindfolds, Light_Bondage, Yandere!Xanxus, Vongola_Succession
      Trial, Fluff_and_Smut
  Stats:
      Published: 2013-10-08 Words: 2930
****** Thorned Throne - The King's Concubine ******
by LadyAxisNeoluna
Summary
     Xanxus gave his all to win after witnessing the beauty of his young
     adversary's power. He will not only get the Sky Ring, but have Tsuna
     all to himself. She will always be his possession. Set at the
     conclusion of the Vongola Ring Battles and near future. Xfem!27.
     Heterosexual remix of "Thorned Throne" by Pakkizuki.
  This work was inspired by
      Thorned_Throne by Pakkizuki
The plans for the Vongola Rings were perfect, so perfect that everything went
accordingly. Xanxus can't help but share the sadistic glee Belphegor felt when
Sawada Setsuna, the girl that was chosen over him, got struck with the
realization that she killed the Ninth boss.
From there it went downhill; shock and devastation that was too much for the
young girl and would decline her abilities greatly, that not even the trusted
Acrobaleno's voice could reach her. It is easy afterwards.
At least, that's how Xanxus' plan had turned out in his mind.
It all went accordingly, until the unexpected happened: the runt snapped. The
fight for the Sky Ring started violently, with Tsuna's confused and blazing
rage unlocked her Dying Will an abnormal manner. It is in this state that
Xanxus realized why Tsuna is chosen as the successor.
The beauty the young girl depicts is surreal; raging flames that showed her
untapped potential erupted everywhere, the power she exhibits would overwhelm
even the strongest Mafioso. And the one taming it is this fragile-looking girl,
her appearance contrasting the powers she possesses, and in Xanxus' eyes, he
has never seen anything more beautiful.
All doubt clear from his mind, he finally realized; he wants Sawada Setsuna.
And he would get what he wants, be that the Vongola or this beautiful young
woman he's facing.
Xanxus neared failed in doing so, the girl’s power left anything in their wake
to collapse, her speed made everything stand still, and her hyper awareness
more easily predicts and counters his every move and breath. Their clash
actually pushed Xanxus to fight without any restraints as Tsuna figured out how
to absorb his flame to empower her own. But what Xanxus figured was that her
body still cannot sustain the already monstrous amount of flame energy without
burning out, and purposely kept feeding her his strongest attack.
Like a charm, the abnormal Dying Will Flames Tsuna emitted caused her to shut
down and fall to her defeat. Xanxus was more merciless, clear headed, and
experienced in controlling his powers than the girl. Her raw resolve just
wasn’t enough.
He quickly destroys the towers and retrieves the rings. Feeling charitable at
the time, Xanxus unlocks the antidote of the Death Heater poison to not only
the Varia but Tsuna’s guardians. Reasoning it would make the process of her
falling for him much easier if he can show some mercy.
Once Tsuna’s guardians were restrained but cured, Xanxus attaches the Vongola
Rings to his chain and put himself into a near death state. When he entered the
strange dimension, he found Tsuna accompanying him, barely holding herself
together, and reluctantly leaning against his arms for support.
Soon, glimpses of the history of crime and atrocities the family committed
throughout the generations appeared before them. Tsuna visibly cringed and shut
her eyes, but Xanxus didn’t bat an eye as he knew first hand in the slums and
as an assassin how cruel people can be. Because of this, he knew what his
resolve is.
The shades of the previous Vongola bosses appears before them, eyes blazing
intensity and authority. Xanxus felt both awe and distain for them.
"You nine bosses saw how our battle went. Her power is raw but could have
beaten me if she could control it." Xanxus explained dryly only to smirk, "I
can accept atrocity as a way of the world, but she is the exception I want to
test. The Vongola could either die or live on with our blood alone, but my
resolve is to see if either her influence or mine will pass to the children I
plan to have with her."
“Hmm” A voice of a young sounding boss said. Soon the shades of the bosses
surrounded Xanxus and Tsuna, their forms glowing to wisps of Sky energy onto
their recognisable beings.
The young man with the strongest Dying Will Flame blazing on his forehead
stepped before Xanxus, his mask disintegrating to reveal golden eyes before he
spoke for the group’s behalf. “It is unprecedented for anyone outside the
family’s bloodline to inherit the ring’s power. However, the state of the
Vongola is at a crossroads for a revolution.” He looks to a younger girl in his
candidate’s arms, “If you take my descendant as your cherished consort, you
will unlock power far beyond what is known about the rings and beyond, but you
ultimately decide whether the famiglia perishes or prospers, Vongola Decimo.”
“Hnn, I understand your terms,” Xanxus confirms, sure of himself.
At this, the resolve is enough for the predecessors of the Vongola Rings to
accept Xanxus, passing their power onto him. It seems that the law stating he
must have the bloodline to succeed the Vongola Famiglia proved otherwise, and
in turn gained all the rights that came with it. He then ceremoniously picked
up the other prize in his arms; the stunningly powerful girl who fought him,
still unconscious from the strain. He kisses her cheek and held her closer
before he orders the Cervello to fix the rest.
oOoOo
A few months passed since that battle. Xanxus took her and her guardians to
live in Italy without any say from the people who knew them in Namimori. Xanxus
let them see her since they were entrusted to be apprentice/servants to the
other Varia officers. Hayako, Takami, Ryohei and Chrome stayed with her in the
Vongola's main house, Lambo was thankfully spared to go back to live with the
Bovino famiglia, while Hibari stayed in Namimori. As powerful Hibari is, he
can't take on Xanxus without the risk of being completely incinerated by his
Flame of Wrath. But because of Hibari's undeniable talent, Dino had him
continue his training from time to time. There had been talk of releasing
Mukuro from the Vendice, but Tsuna didn't know if anything came out of it.
Her mother Nana finally knew what her father's real work was, and she didn't
take the news that her daughter was the heir of a Mafia Empire and taken to be
the bed partner of their deadliest assassin. But Nana had suspected her
husband's work to be suspicious even before they married and she was at fault
for this for not questioning him. She wanted to amend for her daughter's
situation by supporting her in her times of need, she moved to Italy to
properly be close to her husband's family as she should have done in the
beginning.
It is a beautiful, cool night in Italy, but it was all fire in the room of the
Vongola Decimo.
"Xa… Xanxus" Tsuna whimpers, her body overwhelmed from the fiery sensations the
scarred man is administering to her. Xanxus smirks, gazing lustfully down on
the blindfolded girl whose wrists are tied to the bedpost.
His large, skillful hands then sprawled on Tsuna's lithe, naked body, the very
body that withstood inhumanly powerful energy the Varia leader and also now
Vongola Decimo fired without hesitation. Granted, it is a whole different kind
of assault now.
The first time he took her to his bed, broken into her, and tasted her, he felt
more victorious than when he had won the battle. He is the only one who could
claim this beauty, the only one who could watch that fragile looking face twist
in pleasure and pain, and the one who held the power to give and deny Tsuna
those mix of sensations. In turn, he will have no one else but her, as no one
could or ever will compare to her.
Tsuna mewls when his fingers fonds with her nipples, pinching them, then used
his mouth to lick and nibble on them. Tsuna's breath came in short gasps as
Xanxus sucked on one of them, shuddering at the sensation. He then gripped
Tsuna's hips with bruising force, causing the smaller girl to squirm futilely,
since Xanxus is holding her down in place.
Tsuna is addictive. No matter how many times he took Tsuna, the girl never
fails in getting Xanxus drunk on her.
"Aaah!!" The younger of the two cried out, when the older man dug his nails
into the delicate skin, whilst his mouth attacked the girl's neck. He bit down
on the junction between her neck and shoulder, licking and sucking on the flesh
afterwards, then biting down on them all over again hungrily, his mouth
consistently doing all of these as it traveled to the other side of his lover's
neck.
Xanxus let go of his carnal lust, not holding back a single bit of his intense
desire, as his nails dug deeper into the now broken, bleeding skin.
"Nnnh… N-no… Ahh, Xanxus …" Tsuna kept crying. Xanxus groans, voice thick with
lust at the arousing noises and whimpers the young girl beneath him is making.
His mouth locked itself with Tsuna's, his tongue demanding entrance. Tsuna
complies meekly, not wanting to repeat what happened last time when she denied
co-operation, and Xanxus began to ravage the younger girl's mouth.
Using her obedience, Xanxus opens his mouth in the kiss, and Tsuna knows she
has to do the same in keeping her upper and lower lips connected to Xanxus'
respective ones. Xanxus lashed out his tongue unto Tsuna's, where yet again she
knows she must follow and submit to the other's lead and aggression.
Tsuna struggles to keep her mouth open, while at the same time try to not
provoke Xanxus from embedding his nails deeper onto her skin, hurting her more.
The saliva in Tsuna's mouth dribbles down her cheeks, mixed with those of
Xanxus' as the scarred man finally closed his lips over the girl's own, kissing
her hungrily, occasionally licking the trail of saliva on his lover's cheeks.
Xanxus could feel his arousal painfully hardening in his pants, wanting to be
let out. He relieves the girl of his torture for a few moments, the sting from
Xanxus' nails leaving her flesh making the fragile girl wince, mewling at the
sensation.
With her eyesight stripped from her, Tsuna wishes she could take off the
blindfold covering her eyes, because the suspense and anticipation her body is
feeling is driving her crazy. She hears ruffling noises and guesses that Xanxus
is taking off his clothes, and felt the bed shift signalling he's back.
Tsuna's body jerks in surprise when Xanxus teasingly licked her abdomen, then
sucked and scraped his teeth against the flesh. She shudders when the tongue
travels to the bleeding areas from where the Tenth Vongola leader dug his nails
in her flesh.
"Xanxus… Xanxus …!" She cries, as she choked on her voice. It all became too
much when Xanxus starts rubbing her clit as well, teasing the nub and tracing
his fingers along the lips of her saturated opening, toying with it. Tsuna's
body writhe under the man's mercy, her head lolled to the side as she came into
the man's ready hand.
"You really are sensitive, Setsuna." Xanxus say, examining the consistency of
the vaginal fluid, smirking. Tsuna couldn't help it; with her eyesight taken,
she could feel every sensation multiplied, and without her sight she couldn't
anticipate the older man's advances. It doesn't help that she's already
sensitive in the first place.
Xanxus spread Tsuna's wetness on her inner thighs and abdomen, his fluid-
covered hand traveling around those areas, before one of its fingers sliding
inside Tsuna's tight entrance.
"Aaa…. Ahhh…." Tsuna whimpers, her body jerking as Xanxus thrusts his fingers
for a time. The sight before him is intoxicating, the way Tsuna's body moves
and the sounds that she makes is enough to cause Xanxus to go over the edge.
Without warning he suddenly replaced his fingers with his member, inserting it
all the way inside Tsuna.
"Aahhh…!!" She screams, her body arching sharply at the intrusion, tears
seeping through the blindfold. Xanxus began to move, thrusting his member in
and out of Tsuna, his member rubbing harshly against her core over and over
again.
"X-Xanxus!" She wails and moans out that name repeatedly, and God how it sounds
beautiful in Xanxus' ears every time. Xanxus' thrusts began to pick up a
harder, faster pace, and he practically began to pound Tsuna into the mattress,
enjoying every screams and moans from the young girl.
"That's right… Just like that… Keep screaming my name Setsuna…" Xanxus said
huskily.
Tsuna wonders if she could last this one; she knows that Xanxus has a hell of a
stamina, and that meant that Tsuna would have to endure his vigorous, merciless
thrusts probably until morning.
 “X-Xanxus …please,” Tsuna manages to beg.
“Ah? Please what?” Xanxus uninterestedly asks while keeping pace.
“Just…come…inside me.” This stimulation is too maddening for her to keep taking
and tries to keep her breathing leveled. But even then Xanxus didn’t let her
have that, he just smirks from her words.
“Hn, you should be grateful I have you come for me many times,” He honestly
wanted to come inside Tsuna but he enjoys observing the girl react so wantonly
from his treatment. He positions himself in a way that he rubs against her clit
and true enough, as Xanxus continues to move hard and fast, Tsuna had her
second orgasm.
“Ahhh!” Tsuna cries feeling her walls clench hard for the first time, coating
Xanxus' crotch with her fluids.
Xanxus chuckles darkly, “You can’t say I’m not generous now.”
With that, Xanxus continues on this cycle, hearing the other’s drawn gasps in
each climax, only letting them escalate instead of plateau with plenty of
methods to keep Tsuna from fainting. He uses them until he couldn’t hold his
own anymore.
With one last hard thrust, he came, spilling his satisfaction into the girl
underneath him, as he felt Tsuna clench around his intruding shaft, climaxing a
final time as well. Xanxus kisses Tsuna's lips with ferocity, the intensity of
his tongue ravaging Tsuna's mouth unwavering as they rode the feeling out.
"Xanxus …" Tsuna whimpers, said man manages to keep himself from collapsing,
removing himself from her, untying her wrists and releasing her blindfold, and
licked a trail of tears on her cheeks. By then Tsuna's whole body went lax, she
slowly opens her eyes, and the first thing she saw is Xanxus' pair of red
irises, glinting in the slightly dim room.
"Who do you belong to?" Xanxus asks possessively, locking his eyes with Tsuna's
hazy ones.
"I… I belong to you, Xanxus…" Tsuna replies.
"And?" Xanxus presses.
"And…I love you. I love you and only you." Tsuna says, causing Xanxus to smirk
and kiss her as a reward of good behavior. Tsuna still didn't resist him and
even kisses back wholeheartedly before they became breathless.
"I love you too, Sawada Setsuna," Xanxus says before he gives her a quick peck
and touch of her abdomen, "I chose you to be my future wife and the mother of
our children, and I will sooner freeze hell over before you will leave me." He
promises her lowly, though much less harsh as before. His tone became more
gentle after, "Sleep well." He pulls Tsuna into a possessive embrace, letting
himself fall asleep in satisfaction.
Having these encounters many times, Tsuna didn't need to fear pregnancy as
much. Even the first time Xanxus was thoughtful enough to use protection before
he had a doctor give her a birth control implant. She guesses Xanxus wants her
all to himself before childbearing and rearing will occupy more of her time in
the future.
Watching the older man fall asleep, Tsuna can't help but think he looks so
peaceful, even...happy.
She then thinks back at the time the Ninth passed on his memories onto her, and
when she had a dream after the Ring Battle that Tsuna disbelievingly met the
predecessors of Vongola.
From those events, she then knew everything. Why the Sky Ring didn't reject
Xanxus though he had no blood relation to the Vongola, why Reborn, her father
and Dino—though grudgingly— did not interfere in the battle despite the
outcome, and why the Ninth is smiling when he died.
Though each had various aspects to their reasons, one thing is clear in all of
them.
Win or lose, they planned long ago for her to be sent against Xanxus, and for
her to get through to him. She had the ability to match against him in a way no
other person can. It is not just because of her raw power and potential, but
her nature to forgive and even love a faulted man like Xanxus, and save him
from imminent self-destruction from relying on just power. By having mercy on
her guardians when he could have let them die was a good sign he has a
conscience, even if he did it to get her sympathy.
Xanxus continues to be possess her body, but under all of that, he knew his
heart is in her grasp. To nurture and accept it or to reject and destroy it,
she chose the former and never looked back on it.
She should be mad, maybe even furious that she is used as a tool in her
father's and grandfather figure's plans. But…she really couldn't find it in
herself to. This is her role and it is all that mattered most to Tsuna, rather
than the complicated details behind these turn of events.
Tsuna soon fell into slumber after returning Xanxus' possessive embrace with a
gentle one, snuggling into the Tenth's chest with an equally gentle smile. She
made a vow to heal all of his scars one day, "Good night, Xanxus."
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