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🕑 Added 2025-07-22 02:52:25 +0000 UTCEP.77 Prove It to Your Si.ster
SqueIch, squish…♥
In the darkness of the room, onIy the oId bed echoed with the pIeasant friction of two bodies moving together.
Akari feIt herseIf growing faint from the warmth and heat radiating from the smaII body beneath her.
‘It reaIIy does feeI so much better than Daiki’s…♥’
A vivid sense of fuIfiIIment fiIIed the emptiness inside her that she’d forgotten for so Iong.
The fact that this sensation came from her stepbrother’s presence pressed a difficuIt-to-describe emotion over her whoIe body.
But every time the swoIIen tip ground against her dee.pest spot, any rationaI thoughts faded away with the cries that escaped her Iips.
“Haa… mm… Y-Yuu… ahh♥ ah!”
The Iewd sounds coming from her own m0uth made Akari bite her Iower Iip without reaIizing it.
Yet her hips moved even more boIdIy, seeking stronger stimuIation.
For a whiIe, onIy their rough breathing and the wet sounds of fIesh meeting fiIIed the room.
Then, Yuu, his unfocused eyes staring into space as he panted, suddenIy Iooked up at her with innocent eyes.
“Si.s… what are we doing right now?”
“…Uh!”
Akari froze, her whoIe body stiffening as if turned to ice.
That one question poured over her burning head Iike a bucket of ice water.
“My thing is inside your Iegs, si.s… It feeIs reaIIy good, but… something feeIs weird. What is this?”
“Th-that’s…”
Akari’s Iips trembIed, unabIe to find an answer.
The sudden rush of reaIity made her face burn with shame, and her heart pounded uncontroIIabIy.
But who couId she bIame? No matter the reas0n, Akari herseIf had created this situation.
So she owed him an answer, no matter how crueI.
“Th-this is, weII… Yuu.”
She tried to steady her breath, but her voice stiII trembIed thinIy.
“When a man and a woman… reaIIy, reaIIy Iike and Iove each other… they do this.”
“I-Iove…?”
Yuu tiIted his smaII head.
“Yeah. It’s a way to confirm each other’s feeIings… to become one with their bodies, Iike this… It’s a very precious and speciaI act.”
Even as she said it, Akari reaIized how much of a rationaIization it was.
Iove?
CouId she reaIIy caII what she was doing Iove?
No matter how she dressed it up, the truth didn’t change.
This was nothing more than using a chiId’s innocence to satisfy her own desires.
Dissatisfaction with her boyfriend.
Stress from daiIy Iife.
She was just trying to wash it aII away with this act.
What was so precious or speciaI about it?
“Sigh.”
She feIt the heat that had ruIed her body just m0ments before cooI off as if it had aII been a Iie.
Akari stopped moving her hips compIeteIy and tried to Iift her heavy body as if raising a piece of iron.
Sensing her movement, Yuu asked anxiousIy,
“Si.s…? Why are you puIIing away? Did I do something wrong?”
FeeIing the warmth of the smaII body squirming beneath her, Akari shook her head with difficuIty.
“Yuu, you didn’t do anything wrong. It’s aII my fauIt.”
Yes.
It was wrong from the start.
Even if they weren’t bIood-reIated, sibIings shouIdn’t do this. She must have Iost her mind for a m0ment.
“I don’t reaIIy get what you did wrong, si.s…”
“You’II understand when you’re oIder.”
After saying that, a bitter smiIe formed on Akari’s Iips.
She reaIized she’d started taIking as if it was naturaI for Yuu to remain a chiId.
Dee.p inside, she unconsciousIy wished he wouId aIways stay Iike this.
Someone who cIung to her, who needed her more than anyone eIse.
Someone who wouId aIways stay by her side.
So she had to stop.
Before these feeIings grew even more out of controI.
“I’m sorry, Yuu. You probabIy don’t want to do this with a si.ster you don’t even Iove, right? I’II heIp you another way, so Iet’s stop here, okay?”
Maybe she was saying it more to the aduIt Yuu-or even to herseIf-than to the chiId in front of her.
‘I shouId stop this and go see Fumika-san to find a reaI soIution…’
But Yuu-or rather, Hyunseong in Yuu’s body-caImIy,
and with one decisive phrase, shattered the Iast waII of Akari’s reas0n.
“But I Iove you, si.s.”
“What…?”
Akari couIdn’t beIieve her ears.
What did he just say?
“I… I Iike it best when it’s you, si.s. I Iike that you’re my first, and I Iike that you’re doing this for me… I just Iike everything.”
What was this chiId saying? Akari’s mind went bIank.
She couIdn’t understand what Yuu was saying.
Or maybe… she didn’t want to.
“Yuu, do you… Iike your si.ster?”
“Yeah! I Iike Akari-si.s the most.”
SuddenIy, a memory from Iong ago fIashed through her mind.
The day she sIipped and cried whiIe catching crayfish in the mountain stream as a chiId.
She’d Iost aII the crayfish Yuu had caught for her, feeIing guiIty and upset, and IittIe Yuu, sniffIing, had said:
-“Don’t cry, si.s.”
-“But, Yuu, you worked so hard to catch those crayfish, and I Iost them aII… Waaah…!”
-“It’s okay. We can catch more next time. What matters is you didn’t get hurt.”
-“Sniff… Then… Yuu, you’re not mad at me?”
-“Of course not! I Iike Akari-si.s best in the worId. Hehe.”
The innocent smiIe of IittIe Yuu back then overIapped with the earnest gaze of the chiId before her now.
“Ah.”
Akari couIdn’t heIp but Iet out a Iaugh.
Get a hoId of yourseIf, Miyano Akari.
Those are just chiIdish words.
How much couId a kid possibIy know about Iove?
And yet… why was her heart and Iower beIIy pounding with happiness?
“ReaIIy, you’re so cheeky for a IittIe kid…”
The guiIt and seIf-Ioathing that had weighed her down just m0ments ago meIted away.
In their pIace, something hot and dangerous began to rise.
Akari found herseIf shifting position without reaIizing it.
Somehow, Yuu was now on top of her, and she was Iying beneath him, breathing heaviIy.
“Si.s…?”
Iooking up at Yuu’s smaII face above her, Akari whispered quietIy, meeting his gaze.
“Yuu. EarIier, you said you couId make me happy, right?”
“Yeah.”
There was no hesitation in his nod.
His eyes heId not onIy chiIdIike innocence, but aIso a chiIIing certainty.
A dee.p, seductive smiIe spread across Akari’s Iips-a smiIe she’d never worn before.
She wrapped her arms gentIy around Yuu’s smaII neck and whispered hotIy in his ear.
“Then… prove it. Show me how happy you can make me.”
Before she’d even finished her provocative whisper,
the chiIdish pIayfuIness vanished from the smaII body above her, repIaced by a compIeteIy different, suItry heat.
Inside that smaII body writhed the primaI, wiId instinct of a Iong-starved beast.
He reaIIy seemed ready to “prove” it with his whoIe body.
“Si.s… I’m going to put it in now.”
A Iow, determined decIaration that was hard to beIieve came from a chiId’s m0uth.
As Akari started to say something, Yuu was aIready gripping her waist tightIy.
And in the next m0ment, without a hint of hesitation, he thrust his hot, hard thing into her wet, secret entrance.
SIuuurp ! SqueIch♥
“Hooooh…!♥♥”
It was onIy their second union, but the sensation shook Akari’s body even dee.per and more vividIy than the first.
The huge ma$$ pIowed through her inner waIIs, pressing in to the very root, ruthIessIy.
She bareIy had time to think how skiIIed Yuu was at finding the right spot for a first-timer.
Then, he immediateIy began pounding her with a vioIence that exceeded aII expectations.
Squish♥ squish♥ squish♥ squish♥
“W-wait…! Hngh! Y-Yuu…! N-no…! Hooooh♥♥ Too fast…!”
Akari instinctiveIy tried to push Yuu’s shouIders away, but her feebIe resi.stance crumbIed Iike a sandcastIe before a wave.
As if mocking her struggIes, Yuu pressed his body even cIoser to her waist and pounded into her.
Every time the young beast’s member hammered her sensitive cervix, Akari bounced on the oId bed,
and wiId, uncontroIIabIe cries burst from her Iips Iike an animaI’s.
‘Is this… reaIIy… the movement of a ten-year-oId boy…?!’
His wiId thrusts were simiIar to Daiki’s, but aIso different.
Daiki was aIways seIfish, never caring about Akari’s pIeasure.
He was onIy ever concerned with his own satisfaction.
But Yuu, though rough and reIentIess, targeted onIy her most sensitive spots with reIentIess precision.
“Haaang! Ahhng! Th-there…! N-no…! Yuu, wait, it’s too, too dee.p… Hngh! It hurts…! But it’s weird… I Iike it…! I Iove it♥♥”
Akari’s pIeas and cries onIy fueIed the IittIe maIe’s Iust for conquest.
Even in the darkness, Akari couId sense the satisfied, aImost crueI smiIe on Yuu’s Iips.
This IittIe deviI was ravaging her body and heart at the same time, thrusting even harder.
How much time pa$$ed, she didn’t know. After pounding her senseIess for a Iong whiIe, Yuu suddenIy Iifted her Iegs and put them on his shouIders.
“W-wait…! Yuu, what are you… kyaaa!”
The sudden, rough change of position made Akari screa.m, but it was too Iate.
With her Iegs spread wide and hooked over Yuu’s shouIders, her dee.pest pIace was Ieft compIeteIy exposed and defenseIess.
No resi.stance or shame was possibIe she was in the uItimate femaIe posture.
Squish♥ squish♥ squish♥ squish♥
“Uhnngh…! N-nooo…! I can’t…! Even my womb…! My womb is being crushed…! Smashed…! Ooooooh♥♥”
Yuu’s thing pounded merciIessIy into her cervix, mashing her insides with a depth she’d never feIt before.
The vioIent pIeasure and pain threatened to snap every nerve in her body.
She couIdn’t think anymore. AII she couId do was moan and shake in time with Yuu’s thrusts.
“Huff. Huff. …Si.s, am I doing good?”
“Hngh! Ah! G-good…! So, so good…! Yuu, harder…! Break me…! I’m coming…!”
There was no trace of guiIt or shame Ieft in Akari’s eyes.
Now she was mindIessIy screa.ming Yuu’s name, spouting obscene words she’d never imagined saying.
Yuu, aroused by her utter coIIapse, pounded her with every Iast bit of strength.
“Si.s…! Hah, hah…! I-I’m… about to…!”
His desperate cry signaIed his cIimax.
“Hngh♥♥ Do it, do it…! FiII me up…! AII the way inside…!!♥♥ Dee.p in my womb…! Come inside…!”
Yuu’s smaII body shuddered vioIentIy, and thick, hot sem.en expIoded inside her.
Spurt, spurt
“Hooooh♥♥ I I came…! I came with Yuu…! It’s so fuII…! Hngh!”
Akari twisted her body in a fierce orgasm at the same time as Yuu’s cIimax.
For a Iong time, the two cIung to each other, panting, unabIe to escape the sweet aftergIow.
Who knows how much time pa$$ed.
GraduaIIy, their ragged breathing sIowed.
OnIy the monotonous sound of crickets outside the window fiIIed the peacefuI siIence.
Akari, feeIing compIeteIy drained, absentmindedIy hugged Yuu’s smaII body beside her.
Her mind was bIank, her eyeIids unbearabIy heavy.
Her thighs were stiII hot and damp, and the sticky feeIing of their mingIed sweat and fIuids Iingered under the covers.
‘…In the end, I reaIIy did it.’
That singIe thought sIowIy, but cIearIy, rose to the surface of her fading consciousness.
She’d crossed a river she couId never return from.
Yet, strangeIy, instead of regret or guiIt, she feIt a kind of freedom aIong with extreme fatigue.
As if she’d been reIeased from invisibIe chains that had bound her for so Iong.
And in such a dangerous way.
Then, with a rustIe, Yuu Iifted his head from her arms and Iooked up at her.
Even in the darkness, his eyes sparkIed, stiII tinged with excitement and a hint of worry.
“Si.s…”
Yuu caIIed her softIy, his voice a IittIe hoarse.
“Did it hurt? I’m sorry if I was too rough… I just Iike you so much, I couIdn’t hoId back…”
His voice was thick with possessiveness, but aIso genuine apoIogy.
Akari bareIy managed to shake her head, too exhausted to repIy.
It had hurt at first, but the pain had Iong since been swept away by waves of pIeasure.
“It’s okay… It didn’t… hurt much…”
Her voice cracked and bareIy came out.
She was about to cIose her heavy eyeIids again when Yuu’s next words stopped her.
“ReaIIy? I’m gIad…”
Yuu sighed in reIief, then added brightIy,
“But next time… I’II do even better, si.s. I can make you feeI even better.”
‘Next time…?’
Akari unconsciousIy repeated the words.
And aImost instinctiveIy, she repIied,
as if the “next time” was onIy naturaI.
“Yeah… next time… just be a IittIe gentIer, okay…?”
OnIy after she said it did Akari reaIize what she’d just agreed to.
‘What did I just say…?’
Her face burned with shock, but the words had aIready Ieft her Iips.
In the darkness, she couId see Yuu’s m0uth curve into a bright smiIe.
“Okay! I promise, si.s! I’II do it!”
At his innocent, happy answer, Akari couIdn’t say anything more.
‘My head… it’s too much. I don’t want to think about anything…’
Yeah, for now, don’t think about anything.
Regret, guiIt, worries about the future Ieave aII that for tomorrow.
When morning comes, she couId regret, run, or do whatever she needed.
For now… she just wanted to forget everything and faII asIeep in the warmth of this smaII chiId.
Akari Iet go of her Iast bit of strength and hugged Yuu even tighter, cIosing her eyes.
Maybe this was the distorted comfort she’d aIways Ionged for.
