Kato Hiromi instinctively took a deep breath.
From her angle, Kato Megumi had the perfect view through the large floor-to-ceiling window to see everything happening inside.
Megumi felt her body grow numb as she watched.
She recalled what her sister had recently told her—how Hiromi would even defend Nanaya, saying he wasn't that bad.
Why does she know him so well?
Because she's already gotten to know him... intimately!
Thinking of how her sister had always been so good to her growing up, a crystalline tear rolled down Megumi's cheek.
Just as her world seemed to plunge into darkness, she heard Nanaya's voice.
"What would your little sister think if she saw you like this?"
Nanaya gently stroked Hiromi's head as he spoke.
Then he felt his cock being squeezed several more times by her lips.
"P-please... don't mention my sister..."
"If your sister knew you were sacrificing yourself to save her, do you think she'd appreciate it?"
"Without your interference, I might've even become your brother-in-law."
Nanaya chuckled as he said this, his eyes glancing toward an empty spot nearby.
She definitely heard that.
"I just... I just want Megumi to be happy in her own way."
Though Hiromi's words sounded touching, her stammering tone made them seem less than sincere.
"Mmm... slurp... So please, don't talk about Megumi anymore..."
"Nnn... slurp... I'll serve you properly~"
Any words would have felt hollow at this point.
But sometimes silence spoke louder. Hiromi was gradually growing more skilled, using her mouth to pleasure him.
In the process, she was also learning about the many ways to please a man.
Perhaps this was her first proper attempt at acquiring new knowledge.
Since she hadn't fainted or lost consciousness, Hiromi's fervent desire to learn burned even brighter.
Meanwhile, Megumi—now certain that her sister was doing this for her sake—felt a bitter ache in her heart. Yet it wasn't the same as utter despair.
In this transformed state, she found herself drawn to watch her sister's "lessons," even forgetting to hide herself properly.
Due to the difference in their positions, Hiromi remained unaware of her sister's presence.
Nanaya noticed but chose not to point it out, instead openly putting on a show for Megumi.
I wonder how it would feel to have both sisters servicing me...
With Nanaya's subtle coercion and Hiromi's half-hearted resistance, the blowjob gradually reached its conclusion.
Megumi, too, began to develop a fascination with the sight of her sister choking on Nanaya's length. Drip, drip.
The hem of the apron swayed under gravity, droplets of liquid continuously falling to the floor.
A small puddle had already formed beneath.
Looks like Hiromi needs to hang her clothes properly later. Wearing damp clothes might give her a cold.
As Nanaya's cock twiched slightly from the heat of her mouth, Hiromi choked a little.
But it was nothing serious.
Under Nanaya's "concerned" gaze, Hiromi shyly opened her mouth.
It was spotless.
Not at all like someone who had just deepthroated her.
Nanaya felt relieved.
But Megumi, who had seen everything clearly, was anything but reassured.
That much... Sister had to swallow for nearly ten seconds straight. Wouldn't that upset her stomach?
And then...
Megumi caught a glimpse of something white at the corner of her sister's lips.
Though Hiromi's tongue quickly flicked out to lick it away, that momentary sight was enough for Megumi to recognize it—the same white substance she had once studied in the bathroom with her fingers.
In other words, that was Nanaya's cum...!
!!!
Megumi felt her entire being freeze in shock.
"You know what to do next, right?"
"Y-yes, Master... I've already drawn the bath..."
Seeing the two in the room stand up, Megumi hurriedly hid.
When she peeked again, she saw Nanaya leading her sister toward the bathroom.
After uncovering the truth, Megumi's resentment toward her sister's deception and her hatred for Nanaya—once so intense she'd wanted him dead—transformed into a determination to save her sister from this living hell.
From what Nanaya said earlier, it seems he still has some interest in me. Why can't I take my sister's place and protect her instead?
With this thought in mind, Megumi resolved to have a proper talk with Nanaya.
Once Megumi left, Nanaya went all out.
He tossed aside the condom Hiromi had specially prepared and pounced on her blushing figure, pressing her against the bathroom tiles.
The steam from the bath clung to their skin as his hands roughly groped her breasts through the thin apron fabric.
"Master, the bath is—ahhn!~" Hiromi's words dissolved into a moan as Nanaya's teeth nipped at her neck.
His knee pressed between her thighs, rubbing against her soaked panties. She could feel his erection straining against her stomach, already leaking pre-cum onto the apron.
With a tearing sound, Nanaya ripped away her remaining underwear. The apron strings tangled around her wrists as he pinned her hands above her head.
"You prepared this bath for me, didn't you?" he growled, biting her earlobe. "Such a good little slave, always thinking of Master's comfort."
Hiromi whimpered as his fingers plunged into her dripping pussy without warning.
Her back arched off the wall as he finger-fucked her ruthlessly, the squelching sounds obscenely loud in the humid bathroom. "N-no, I just—ah!~ Just wanted to—nngh!~"
"Wanted to what?" Nanaya twisted his fingers inside her, making her scream. "Say it."
"W-wanted to serve Master properly!" she sobbed, her legs trembling violently. Her clit throbbed against his palm as he added a third finger, stretching her obscenely.
Nanaya smirked as he felt her walls clench around his fingers. "Already close? You really are a sex slave." With a cruel chuckle, he withdrew his fingers completely, making her cry out in frustration.
Before she could protest, he spun her around and bent her over the edge of the bathtub.
Her round ass jiggled as he delivered a sharp spank, leaving a red handprint on her pale skin. "Hold onto the rim," he ordered, lining up his cock with her entrance. "And don't you dare cum until I say so."
Hiromi barely had time to nod before he sheathed himself to the hilt in one brutal thrust.
Her scream echoed off the tiles as he set a punishing pace, her breasts bouncing wildly beneath the apron with each slam of his hips.
The bathwater sloshed violently as he fucked her, their sweat mixing with the steam.
"You're taking me so well," Nanaya taunted, gripping her hips hard enough to bruise. "Does your sister know what a cock-hungry bitch you are?" He punctuated each word with a deep thrust, hitting her cervix.
"N-no! Please—ah!~ Don't talk about M-Megumi—nngh!~" Hiromi's protests turned to mindless moans as he angled his hips to grind against her G-spot.
Her nails scraped against the porcelain as she struggled to obey his order not to cum.
Nanaya leaned over her, his breath hot against her ear.
"I can smell how wet you are. You love this, don't you? Love being your Master's little cocksleeve?"
His hand snaked around to rub her clit in tight circles.
Hiromi's vision whited out as her orgasm ripped through her, her walls clamping down on his cock like a vice. With a groan,
Nanaya followed her over the edge, filling her with thick spurts of cum. He kept her impaled on his softening length, making sure every drop stayed inside her.
As Hiromi lay panting against the tub, Nanaya casually wiped his cock on the apron before patting her head. "Good girl. Now clean yourself up before your sister comes home."
---
By the time Megumi checked the clock and realized it was almost time for school to end, she finally left the café and returned home.
The house was as peaceful and harmonious as ever.
Her sister was just as caring as always.
Seeing Hiromi in a long bathrobe, smiling at her despite her slightly unsteady steps, and hearing her sister's affectionate words, Megumi steeled her resolve once more.
I will repay my sister. I will save her.
This time, Sister... it's my turn to rescue you!
————————————
"Nanaya-san, do you have a moment?"
Nanaya glanced at Megumi, who had taken the initiative to speak to him, then pretended not to hear, not even looking at her.
Gritting her teeth, Megumi understood—this was Nanaya keeping his "promise" to her sister by maintaining distance.
But this wasn't what she wanted.
How can I save Sister if we're kept apart like this?
So, in her desperation to rescue her sister, Megumi did something she would never normally dare.
With trembling hands, she took Nanaya's hand and placed it on her thigh!
Today, Megumi was wearing white thigh-highs. Having seen her sister in over-the-knee white stockings that day, she'd naturally assumed Nanaya liked them.
After spending her allowance on a pair, she'd mustered the courage to approach him today.
Nanaya's hand rested on Megumi's absolute territory, his fingertips even slightly tucked under her skirt.
The heat radiating from just beyond seemed to beckon his fingers to explore further.
Yet Nanaya remained silent and motionless, as if completely indifferent.
Seeing him like this, Megumi couldn't help but feel a bitter taste in her mouth.
---
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