Because it was Nanaya's text message that summoned her.
Kato Hiromi had already wore unusually revealing clothing beneath her coat in preparation for her master.
Like a kitten in heat, she placed her hands on Nanaya's thighs and slowly slid them upward.
The loose collar of her top fell open with gravity, allowing Nanaya an unobstructed view of Hiromi's pale, slightly trembling skin and the alluring cleavage between her breasts.
A faint blush adorned her skin.
Yet the most enticing fruits remained hidden.
This very act of partial concealment was what made it all the more seductive.
Perhaps she had studied the art, for Kato Hiromi grew increasingly skilled at tempting Nanaya.
But this soul-shaking display elicited little reaction from Nanaya, who remained as firm as ever.
Seeing Nanaya's complete lack of response didn't surprise Hiromi in the slightest.
After all, Nanaya always preferred her to take the initiative.
So she traced a finger along Nanaya's chest while her other hand gently grasped the already hardened and wet tip.
The slight stickiness from mixed juices provided just enough lubrication for her movements to grow smoother.
Hiromi's long, alluring legs remained mostly exposed.
From Megumi's perspective, she could even see the plump, rounded skin near the very top of her sister's thighs.
"Sister?"
Kato Megumi couldn't comprehend what she was seeing.
By all logic, her sister shouldn't have any connection with Nanaya anymore—so why were her movements so practiced?
Before Megumi could process this, she watched as Nanaya suddenly pulled Hiromi into his arms, tilting her chin up before crushing his lips against hers.
The two began a feverish, wet kiss...
Nanaya's other hand slid downward, deftly lifting the hem of her skirt before slipping beneath.
Through the thin fabric of her panties, he kneaded Hiromi's rounded backside.
Lost in the kiss, Hiromi sucked eagerly on Nanaya's tongue, paying no mind to how thoroughly her lower half had already been conquered.
If anything, being touched like this by Nanaya only filled her with more satisfaction.
She felt his fingers slip beneath the lace trim of her underwear, tracing the smooth, elastic skin.
No matter how many times Nanaya played with her, the sensation never dulled.
His fingers trailed along the lace edge, moving from back to front until his palm cupped the warmth and wetness completely.
The short, delicate curls brushed against his skin.
The entrance to her secret garden had long since grown slick with desire.
Waves of suction pulsed from her depths, as if her body already recognized its master.
It ached for his return home.
As Hiromi's corruption deepened, the flames of her desire burned ever brighter.
She couldn't help but crave more.
As Nanaya's fingers pressed deeper, Hiromi threw her head back with a loud gasp, brows furrowing, eyes glazed with pleasure.
Drool spilled out from her lips, dripping onto her body.
Soft, sinful moans escaped her throat before she collapsed weakly into Nanaya's arms.
Just that brief teasing had already pushed her over the edge once.
"Hmph. Who gave you permission to finish?"
"I-I'm sorry, Master... This slut was wrong... P-Punish me, please~"
The shameless words and expression on Hiromi's face were utterly foreign to Megumi.
She stared blankly as Nanaya's skilled large hands roamed her sister's body.
Those same thick fingers that should have been on her now played deftly with Hiromi's tender flesh.
With the first release achieved, the floodgates had opened.
A steady stream flowed forth, drenching the ground below into muddy wetness.
Nanaya's hands traced the soft skin of Hiromi's inner thighs, his fingers occasionally brushing over both gardens in turn.
With ample experience under her belt, Hiromi always prepared meticulously before meeting Nanaya—watering herself thoroughly to ensure no dryness remained, all for his comfort.
Hiromi cried out again, her burning red face buried in Nanaya's chest as she panted, her cute tongue peeking out slightly.
Tremors wracked her body uncontrollably, every inch of her scorching hot.
Nanaya's familiar teasing left her boneless in his grasp.
Yet her restless squirming betrayed her subconscious plea—More! She wanted more!
But Nanaya had no intention of indulging her so easily.
His gaze shifted to Megumi, who sat frozen on the floor.
Her eyes were blank.
She never imagined her sister would do something like this in front of her—and with such practiced ease.
What did that mean?
It meant her sister had sought out Nanaya behind her back!
As for why it couldn't have been Nanaya who approached her sister?
Because Nanaya showed her his messages every day. Megumi trusted him deeply.
"No! Sister, Nanaya is mine!"
The normally reserved Megumi finally voiced her desire aloud.
She grabbed her sister's clothes, trying to pull her away.
"N-No, Megumi... It's too soon for you... Let me handle this..."
Hiromi refused hazily.
Nanaya delivered two sharp smacks to Hiromi's backside, sending droplets flying.
They splattered across Megumi's face.
"Heh. Did you two really think either of you could satisfy me alone?"
Nanaya stood, lifting Hiromi into his arms while using his foot to nudge Megumi upright.
"Come back when you've learned to please me properly. Then we'll talk."
With that, Nanaya carried Hiromi toward the bathroom, Megumi trailing behind.
Under Nanaya's relentless assault—
Not only did Hiromi roll her eyes back in ecstasy, pushed beyond her limits...
But Megumi, experiencing her first time being plowed in that other garden, soon found her consciousness fracturing.
Every muscle ached.
Megumi's performance paled in comparison to her sister's.
So Nanaya focused more on Hiromi.
Leaving Megumi to realize just how powerless she was... (I can't do anything...)
That bitter thought flashed through her mind as she watched her sister somehow endure Nanaya's storm.
Then darkness claimed her.
Some time later—
The sisters awoke facing each other.
None of the expected awkwardness surfaced.
Having already seen each other's most shameful states, no words needed to be said.
They had silently accepted this new reality.
Nanaya had planned to "persuade" them physically at the first sign of dissent.
But his preparations proved unnecessary.
Not that it stopped him from inventing reasons anyway.
"You clamped down too hard earlier."
"You didn't tighten properly just now, did you?"
With remarks like these, he hammered home one truth:
Alone, they were helpless.
Only together could they hope to glimpse victory's dawn.
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