"If you think of it in terms of cooking, women are the ingredients—fresh, delicious, and premium-grade. And then there's the situation, I suppose. The kind where a woman is humiliated. That's the herb. It enhances the flavor of the main ingredient. Of course, some people dislike the unique aroma and taste of herbs, but I happen to enjoy it..."
At that point in the conversation, Onii-sama explained:
"What exactly is a masochist, or a maso?"
Kotoha... I'm sure I'm a maso.
That's why I'm so deeply drawn to Onii-sama's stories. The catharsis comes when a pure, beautiful heroine falls from grace, becoming lewd and depraved, uttering words she would never have spoken before. And the sheer obscenity of those words... it's what makes me feel aroused.
Onee-sama said it too. "Kotoha, you're a masochist," she said.
But Kotoha is cowardly, lacking the courage to take that step.
Though I've always wanted to be like this someday, I can't bring myself to deliberately hurt myself.
But surely, if it's with Onii-sama...
If Onii-sama does it, I believe I could accept anything.
Kotoha understands that she doesn't belong to the majority. She knows that this lewdness, this overwhelming lust that reason can't suppress, is something the world looks down upon.
But Onii-sama accepted me—my sudden visits, my naive behavior, my calling him "brother"—even though I'm a hopeless romantic who deserves ridicule. He allowed me to offer him my virginity.
He took Kotoha's hand as she was about to take her first step into the world of sensual pleasure she had long dreamed of.
That's why Kotoha believed she could accept anything her brother did.
But...
"I... I can't, Onii-sama. Are you really going to... do this?"
"You were the one who brought it up first, weren't you?"
"That's true, but..."
At the last moment, I became cowardly.
The night wind stole the warmth from Kotoha's cheeks, but her body seemed to be generating heat faster than it could dissipate, making the burning sensation only worsen. From the side, she must have looked as red as an apple.
We were alone in the park at night, but we could only see as far as the streetlights reached. If someone were hiding in the shadows of the playground equipment or behind the bushes, Kotoha wouldn't have been able to spot them.
Of course, there's no way anyone could be hiding in such a place... I know that. But I can't help but feel so nervous, imagining the worst-case scenario.
It's not just the warmth spreading through my body; my heart is pounding so hard it feels like it might burst, its rhythm echoing through my entire being. My hands and feet tremble uncontrollably.
Yes, it's all my own fault for what I said. Perhaps it was a careless remark.
My usually kind Onii-sama seems like a switch has flipped inside him, tormenting and berating my heart at this very moment.
Yes, yes—after hearing my earlier comment, Onii-sama took my hand and led me outside before I knew what was happening.
The fact that our hands touched is part of what's making my heart race, but that's beside the point.
More than anything, what made Kotoha nervous was the shame of exposing her skin outdoors.
Right now, the only thing covering her body was a long coat borrowed from her brother.
If she undid the buttons and opened it, her frail limbs would be revealed.
What if someone saw her?
Kotoha might be pinned down and violated by some nameless person.
What if someone took pictures of her?
Her naked body would be exposed in the digital sea, spread far and wide, accessible to countless strangers at any time. Worse still, it might mean that, for years to come, strangers in unknown places at unknown times might use images of her to masturbate.
Just thinking about it made her chest ache and her breath grow rough... Whether it was tension, fear, or even an unconscious arousal, Kotoha couldn't tell.
Masochistic training—I always thought it involved inflicting physical pain. Whippings, spankings—those sorts of physical punishments.
But Onii-sama wants to use these methods to discipline my heart.
This is different, Onii-sama. Even as that thought crossed my mind, my body burned with heat. I wondered if he had asked me to do this, knowing everything, precisely to make me even more aroused. But the truth of his motives remained a mystery to me.
"Please forgive me, Onii-sama... If we're inside the house, I'll show you my shameful body as much as you like. Even if you stare until my eyes burn out, it's fine..."
Onii-sama sat on the bench, illuminated by the light. His lips curved into a faint smile, but his sharp gaze fixed on me, leaving no room for argument.
My kind Onii-sama would never say such a thing aloud, but do I imagine he's implying it?
"Onii-sama, please... please, have mercy. If anyone sees me like this... if anyone from home finds out, Kotoha..."
"But Kotoha, you're smiling."
"Huh—?"
Without thinking, my hands flew to my lips, my cheeks—I realized it.
Just as Onii-sama said.
Despite my protests, my expression had, however slightly, relaxed into a sloppy smile.
"To smile means you're enjoying it, right?"
"That's not—"
I desperately wanted to deny it, to insist that wasn't true. But I couldn't.
This face itself is undeniable proof.
I had expected my cheeks to be tense and stiff from nerves, but instead they felt soft and relaxed.
I was aware of the warmth spreading through my body, but I never imagined my body would react so strongly to this situation that it would show on my face.
Ahh... what is this?
"Onii-sama... Kotoha..."
It felt as if the ground beneath me were swaying.
Even though I hadn't exposed any skin, just being naked under my coat made me feel so flustered and aroused that my face felt like it might burst into flames. Yet Kotoha was smiling faintly, clearly pleased.
Onii-sama noticed something Kotoha hadn't.
Perhaps he now understood this body better than Kotoha herself.
Perhaps this body truly belongs to Onii-sama, not me.
"It's okay. I happen to like naughty girls."
"...That's so unfair, Onii-sama."
When my heart is wavering, vulnerable, and I hear words like that...
It's impossible not to be drawn in.
I feel a sense of relief.
Being by Onii-sama's side, I start to believe I can fall as far as I want.
I want to feel even better. I want to plunge into depravity, become a wanton woman—
Before I know it, Kotoha's fingers are reaching for the coat buttons.
"Onii-sama... I'm hiding my naked body beneath this coat... It might be a sight for sore eyes, but... would you care to see it...?"
"Of course. I'd be delighted to grant your wish, Kotoha."
"Thank you... Then... let me begin."
This time, I clearly feel a smile forming on my lips as I tremble and unbutton my shirt, one by one, starting from the top.
With each button undone, my heartbeat grows louder, and the trembling of my fingers and the burning in my cheeks worsen.
My breathing becomes rough, panting through my mouth, until I finally remove the last button.
"Oh... beautiful..."
Onii-sama lets out a soft exclamation, and a cool breeze touches my skin, trying to soothe the burning.
But as he parts the coat, exposing my bare chest and nipples, my body burns even hotter, and I feel my temperature rising.
Looking down, I see my nipples standing erect, swollen like tiny penises. Their delicate tremors are undeniable proof of my arousal and anticipation.
As I closed my thighs and rubbed them together, I felt a sticky, viscous moisture—like honey—between them. This could be nothing but proof of my aroused state, my female essence overflowing.
"Aah... we shouldn't be doing this... What if someone sees? What if a photo is taken and spreads across the digital sea? My lewdness, my shamelessness, would become known throughout the world, and my life would be ruined..."
"But doesn't that thought send shivers down your spine?"
No, of course not.
My rational mind protested against my brother's question, pushing the words up to my throat.
But no further. The words never escaped my lips, swallowed along with the sound of my swallowing.
No, of course not...
"...Yes, Onii-sama♡"
It exists.
My slack mouth, my damp inner thighs. The muscles in my face have lost their strength, my eyes barely open halfway. With my face bearing nothing but a loose, melted smile, who could possibly find any disgust or revulsion in me?
The taste of sin is like honey.
What's forbidden feels so good.
This might become a habit.
"Onii-sama... are you going to do it? Right here, right now?"
"Don't worry, I won't tell you to take off your coat. If we press our bodies together, neither of us will see anything embarrassing. Right?"
It was exactly what Kotoha had said and done that day Onii-sama turned her into a woman.
Since Kotoha had been the one to take the initiative back then, all she could do now was nod. Not that she had any intention of resisting from the start.
"Come here."
"Yes, Onii-sama."
He sat down on the bench again, spreading his arms wide.
Kotoha faced him, straddling his lap and settling onto his thighs.
The moment she did, his hand slipped inside her open coat and brushed against her breast.
"Ugh... Ah, Onii-sama... When you touch me like that... I can't help but moan..."
His fingers moved from the base of my breast to the tip, kneading the soft mounds of flesh with a rhythmic motion, like turning a potter's wheel. His nails scratched lightly at the boundary between the areola and the glans.
The sensations ranged from ticklishness to weak stimulation that made me want to writhe impatiently.
Ah, Onii-sama is so naughty.
My nipples weren't hardened by cold, but by arousal, swelling and turning red.
They trembled delicately, pleading to be touched, to be tormented, but he ignored them completely, focusing on kneading the breast flesh and tracing the thin, slightly swollen areola.
"No matter how gently I touch you, Kotoha, you can't hold back your moans, can you? With nipples this sensitive and erect..."
"Hiiiiiiu?!"
Squelch.
Onii-sama's rough fingers finally pinched my eagerly awaiting nipple.
I quickly covered my mouth with my hand, but I couldn't suppress my moans. If there had been anyone else in the park, they would have heard me for sure.
"Hii, hiiii♡ Ahh, kuuun♡ Onii-sama...♡ No, not like that! Too hard, too rough—stop tormenting my nipple! It feels so good... I can't... please, forgive me♡"
Even as I tried to restrain myself, the intense pleasure from my abused nipple made my voice crack.
"Exactly as you say...♡ My nipple is so sensitive that even the slightest touch makes it impossible for me to hold back. So please... be gentle...♡ If anyone hears me...!"
"I don't think you need to hold back at all. This is my chance to show off my cute and erotic little sister. Whether you restrain yourself or not is entirely up to you, Kotoha."
"S-s-such a cruel thing...! Please don't say that... Ahh♡"
Onii-sama tightened his grip, crushing my breast.
The restrained flesh pulsed with heat, as if his passion were being channeled through his fingers. The altered shape of my nipple made it swell from its base, standing erect and now longer than the tip of his pinky finger.
Despite the chilly night air that made my naked body shiver, my feverish skin began to glisten with sweat. The air around me, confined to an impossibly small space, felt steamy and warm, as if it had been saturated by my own heat.
"How does it feel, Kotoha? Having your breasts exposed outside, being squeezed and kneaded like this?"
"I don't... understand...♡ It's so embarrassing... yet... I'm doing something so improper...♡ And yet, I feel so good...♡ Onii-sama... I'm so sorry... Kotoha... I'm far more lewd than I ever imagined...♡"
"It's alright. You're still quite cute."
Onii-sama chuckled with amusement.
The person Kotoha was being compared to, of course, was Shino Onee-sama.
Judging by Onii-sama's tone, Onee-sama must become far more wildly disheveled than I ever could.
If Onee-sama is like that... then perhaps Kotoha can be a little disheveled too?
"Onii-sama... you're enjoying my utterly shameless state, aren't you...? You're so... so manly...♡"
My breasts, having become mere toys to alleviate his boredom, remained in his large hands as I reached toward Onii-sama's crotch. His pants were stretched taut, bulging so visibly it seemed to shout, "Look at this!" Kotoha, with her different body type, couldn't tell what Onii-sama was actually feeling, but he looked uncomfortable.
When my finger touched the peak of his tent, he flinched and let out a muffled groan.
"I showed you Kotoha half-naked outside, and you even let me touch your chest. It'd be rude not to get hard now."
"Ah! Just those words alone make my chest so happy...♡"
The overwhelming joy made my head spin.
Onii-sama, who had accepted Kotoha. Being acknowledged by him, praised by him—there was nothing happier than that.
Onii-sama's feelings for Kotoha are clear just by looking at the triangular shape in his pants. A mental pleasure, distinct from the physical pleasure I feel from his breasts, fills me, and my expression softens.
"Onii-sama... may I... soothe this arousal of yours?"
"If you're willing, there's nothing that would make me happier. Are you sure?"
"Yes, of course. Your pleasure is my pleasure. When you feel good, I feel good, too. ♡"
Feeling my heart race, I slowly unzip Onii-sama's pants, careful not to hurt his sturdy erection. I take my time, being gentle.
When I finally pull the zipper down completely and spread the window of his underwear open, his meaty spear bursts forth with such force it seems to leap out.
No matter how many times I see it, I can't help but gasp at its overwhelming presence.
If something as thick as a toddler's arm is meant to fit inside a woman's vagina... then this is the equivalent of a vampire-killing stake—a flesh stake that kills women.
"Heh... So magnificent, Onii-sama... Even Onee-sama wouldn't stand a chance if she were violated by this... And Kotoha, with her limited experience, would be even more vulnerable... A single thrust might send her straight to heaven♡"
If this stake were to pierce Kotoha, she'd ascend effortlessly. With this impossibly long, thick, and hot Cock-sama, it might not be impossible to drive Onee-sama insane with pleasure—no, it's likely she's already been reduced to a mere toy by this Cock-sama. Press the "uterus" button, and she'll just moan.
"Hot, hard... It's like red-hot iron♡"
"That's how it gets into Kotoha. Forcing its way into her narrow pussy, stretching her, scraping against her, molding her pussy into the shape of my cock."
"Understood...♡ Kotoha belongs to Onii-sama, so everything is as you wish. But for now... please, let me feel your passion with my hands just a little longer♡"
From Onii-sama's perspective, it's the underside. From mine, it's the front. I extend my index finger and gently trace the vein running along the underside of the shaft from its root. Cock-sama trembles adorably, revealing a vulnerable side. Or perhaps he's angry that I didn't immediately take him into my pussy.
When I stop moving my finger, I can feel the pulsation of life, the flow of blood. It's Kotoha's lewdness that causes the erectile tissue to swell.
That makes me incredibly happy and affectionate.
What once seemed grotesque now evokes only a sense of imposing dignity and rugged strength.
I form a ring with my index and middle fingers, gently pressing the soft glans upward, then tighten the ring and rub it against my wrist. I press the glans with the pad of my middle finger, rubbing it back and forth.
"Ah... you're quite proactive, Kotoha."
"Yes. This is service. Passive service isn't service at all."
My free hand reaches for Onii-sama's crotch.
Knowing how tired his testicles must be from dealing with me and Onee-sama all day, I cradle them in my palm and massage them gently. Through the soft scrotal sack, I savor the firm, ridged texture of the male treasure—the sperm-producing organ—with hands conscious of their gentleness.
Cupping my palm around them, I feel a faint warmth, a reminder that even now, the seeds are being brewed to boiling... The moment the word "seed" registers, my uterus—the field where Onii-sama's seed would be planted—tingles with a sweet, poignant longing.
I want to insert it. Into Kotoha's depths.
"Onii-sama—"
"You can do whatever you like with me, Kotoha."
He said nothing, yet his words seemed to anticipate my every thought. It dawned on me then that both my body and heart already belonged to him.
The fact that he could see right through me was proof of how simple and shallow my heart was. Yet, the feeling that our hearts had become one with his overwhelmed any self-loathing with joy.
"Then, Onii-sama... I welcome Cock-sama into my female pot now."
I lifted my hips, guiding his cock to my entrance with my hand.
"Ah, so hot...♡"
Squelch.
The moment our mucous membranes touched, the heat surged to my brain, eliciting an involuntary moan.
My honey pot was already drenched; foreplay was unnecessary.
Having already accustomed myself through repeated masturbation, and having already taken Cock-sama into my mouth once, my slit was slightly closed, but offered far less resistance than it appeared.
Feeling my heart pounding fiercely, I took a deep breath and lowered my hips.
"Ugh...! Haaah, ah... Ahh...♡ It's so hot... Onii-sama's Cock-sama is entering my womb... Nngh...♡"
Squelch, squelch-squelch, gurgle...
With each deeper thrust, lewd, sticky wet sounds echoed as air was forced out by Cock-sama.
Simultaneously, my vaginal walls were stretched and molded by the glans, sending electric currents surging through my mind... It was incredibly pleasurable, utterly delightful.
"You're making such a cute face, Kotoha. So dazed and blissed out, your face is melting."
"H-yes... My pussy has melted from Cock-sama's heat, my face is a pussy now... This is Kotoha's shameful face, reserved only for Onii-sama...♡"
"..."
"Onii-sama?"
"Damn, that's getting me aroused."
"Eep!"
Thud!
He thrust upward violently, crushing me, driving Cock-sama deep into my uterus.
The impact shot straight up, from my uterus to the top of my head, like the shockwave was coursing through my entire body, not just my lower half. It felt as if my mind and body were merging with him.
That single strike shattered Kotoha's composure, draining all strength from her limbs. Her head swayed, and she collapsed against Onii-sama's chest.
Her entire face pressed against his hardness, his warmth, his scent. Feeling his presence directly, intertwined with the sensation of Cock-sama inside her, intensified the conviction that they were becoming one.
"Ugh, heh, ah... Onii-sama...♡"
Every time I wriggled and sought him, the ridges of my inner walls would rub against Cock-sama, sending spikes of pleasure into my brain.
"Getting used to being outside? Or has my cock made you forget where we are?"
"I... I don't know... Yes, I suppose... This isn't home, is it?"
"That's right. So focused on my cock you can't even see what's around you... Kotoha, you're such a slut."
My cheeks flushed even hotter.
But I knew that was a compliment from Onii-sama. And anything he meant as praise was praise to me as well.
As I raised my head to express my gratitude—
"Shh! Quiet!"
His large hand clapped over my mouth.
I obeyed his command, and silence fell. The wind whispered through the leaves, branches creaked, and fallen leaves rustled.
Is that all I can hear...?
"No, that's not it. Just now, Kotoha's ears picked up something else—another sound."
"O-Onii-sama..."
"Yeah. Someone must have passed by."
Someone is nearby.
Overwhelmed by fear, Kotoha pressed her front against Onii-sama, clinging tightly to him as if trying to hide herself.
Glancing sideways, she spotted a figure slowly approaching beyond the shrubbery that marked the park's boundary.
Please... please don't look this way.
Just keep walking straight ahead and get out of this park.
She squeezed her eyes shut, clung to Onii-sama, covered her skin, and prayed.
If they were seen... the terror made her want to cover her face and hide.
Agh—what is this?
Even in this situation, Kotoha realized her lips were softening, her expression melting, as she savored the thrill of danger.
Even with self-awareness, I never imagined things would get this bad.
"Kotoha... your pussy is clenching down so hard..."
"Ah! I'm so sorry, Onii-sama! Kotoha... haaah...!"
Kotoha is a masochist with a depraved penchant for humiliation, an utterly shameless woman.
Despite the risks, I can't stop my pussy from squeezing tight, can't stop grinding my hips to crush my uterus against him.
"Aah... haaah... Onii-sama... Onii-sama... I'm so sorry... I can't... I can't hold back... I can't stop myself from feeling good...!"
As our bodies press closer, the angle of his cock inside me shifts upward, my weight pushing against my cervix.
What the hell is happening?
My slender body was crushed by Onii-sama's arm, my cervix by Cock-sama.
The pressure was so intense I felt short of breath. Who would have thought such overwhelming force could feel so good?
"Kotoha, this feels amazing... I can't hold back anymore!"
"Huh? What? Nngh... Ohhh!"
A sudden, blunt impact struck me like a heavy blow to the head.
But it didn't stop there—two more times, five, ten. Repeated strikes of intense pleasure.
Onii-sama was thrusting his hips, seeking Kotoha. Seeking to pleasure himself through her.
The bench creaked softly with each movement. The junction between us sang a lewd melody, schlick schlick, while Kotoha couldn't stop herself from trilling.
The pleasure of meeting each of Onii-sama's thrusts, of devouring him, was amplified by the forbidden thrill of potentially being seen. This pushed Kotoha's last shreds of rationality to the brink.
My womb ached with a pulsating pain, craving warmth and white fluid as my lips clung to his glans.
The contracting vaginal muscles, gripped by the same desire, wound tightly around his shaft.
It was a clinging gesture, like a child tugging at a sleeve, begging to be held back. A sweet, feline whine, a feeble resistance.
But against his powerful thrusts, it proved futile. In fact, the deeper and harder he pushed, the more violently his movements tore at my mucous membranes, plunging me into a madness of pleasure.
I wanted to scream—needed to scream. If I could just voice it, I might be able to release some of this ecstasy.
"Fuu... Ahh... Hii...! Uwa... Nnghuuuuu...!"
I gritted my teeth, burying my face in Onii-sama's chest to muffle the sounds.
My mind, scorched by the heat of pleasure, could no longer form coherent thoughts.
My body writhes relentlessly, seeking the boiling semen within my testicles, the movements of the wanton woman unstoppable.
The lingering fear of making a sound only intensifies the pain. How blissful it would be if I could simply let out a cry without reservation.
But I can't. Clutching desperately to Onii-sama's clothes, soaking them with my overflowing tears, all I can do is endure.
"Mmm...! Kuu, fuu...!"
"Kotoha, it's alright now. He seems to have left."
"Huh—?"
As gentle words accompany pats on the back, I turn my face toward the world outside and indeed, no one is there.
But he can't have gone far yet. Besides, there's no way a loud cry like that wouldn't have reached the neighbors.
Even Onii-sama should understand this, but...
"Ah... Onii-sama... Not yet... No...♡"
He thrusts even harder, tormenting me. Not only that, he resumes fondling my breasts. The pleasure from our connected flesh alone is overwhelming, but the added sensation of my nipples being plucked by his nails sends my mind into a chaotic whirl.
Does he trust me not to make a sound? Or does he want to see me writhing in anguish, my face contorted in tears? I don't know. The only certainty is that even in the absence of witnesses, I mustn't scream.
The dam holding back my cries is already on the verge of collapse. Cracked and splintered, it can barely withstand a few more thrusts.
The moment I understood, I acted instinctively—without thinking, my body moved on its own.
"Mmm—♡"
I pressed my lips against Onii-sama's.
And in that instant, my nipple was pinched hard, and Cock-sama exploded at the entrance to my uterus.
"~~~~~~Ngh!?"
With each burst of semen flooding into me, my body jolted violently.
It felt like being struck on the head with a blunt instrument—the sensation of semen being ejected into my uterus was exactly that.
Yet there was no pain, only a violent, head-shaking impact that shook my entire body. Or perhaps it was the world that was shaking? I couldn't tell.
"Ooh♡ Ohh♡ Deep inside...♡ My uterus is dripping with semen♡ I'm drowning... My uterus is drowning in semen♡"
The continuous sparks before my eyes nearly make me lose consciousness, but the sensations I feel deep within my womb flood my mind. Though liquid, it never flows smoothly, instead thick and viscous, pulsating. It's so hot I fear I might be burned.
The semen, having struck my uterus and then surged back, overflows from Kotoha's folds. It's as if every inch of my vagina, from the entrance to the deepest recesses of my uterus, has been utterly saturated. As if the semen clings to every ridge and fold within me... This must be what they call growth, right?
"Chu, amu...♡ Juru, chu...♡"
It feels as if all the heat in my body has been absorbed by the semen. The warmth in my abdomen is so intense, it's a delusion.
Come to think of it, that was my first mouth-to-mouth kiss—the kind where lips meet.
The fever subsided smoothly, and my chilled body hungrily devoured Onii-sama's lips, carving the sensation of the kiss into my brain and heart.
Since I carved it into my mind alongside the lingering afterglow of orgasm, every kiss might make my body climax.
That, too, would be entertaining. Since Onii-sama loves lewd women, he'd probably appreciate such a body as another object of desire.
"Puhaah... Haa..." I parted our lips, gasping in a lungful of air.
Released from the shackles of restraint, my body felt light despite the weight of fatigue.
"...Onii-sama, you're so cruel. Toying with me like that in such a tense situation, where anyone might walk in..."
"Sorry. You looked so cute, trying to hold back... I couldn't resist."
"So cute..."
The lingering warmth had left a flush on my cheeks.
Thinking about what's to come, I feel I should probably mutter a few grievances, but nothing comes out. It's as if the heat burned them all away, reducing them to ashes.
"But Kotoha, you've been gripping me so tightly ever since you realized someone might be here. Weren't you aroused?"
"T-That... That was just... my body tensing up from nervousness..."
Trying to gloss over it, I forced my weakening body to move, lifting my hips to break the connection. Kotoha's crotch and Onii-sama's pants were both sticky and dirty.
Most of the mess wasn't white semen, but my own secretion—the proof of my arousal. A female's nectar—
"...Nervous?"
"I... I'm so sorry..."
A different kind of heat surged through me, making my head feel like it was boiling.
Onii-sama placed his large hand on Kotoha's bowed head and stroked her hair as if combing it.
"It's okay. I like naughty girls."
I didn't know how many times he'd said those words that day, but they were my greatest comfort.
Holding back the tears welling up in my eyes, I bowed deeply to Onii-sama.
"Thank you so much...! I'll strive to become the kind of naughty girl you love, Onii-sama! I, Kotoha, will work hard!"
My fervor made me shout unintentionally. Onii-sama hurriedly covered my mouth, and I couldn't shake the guilt for days afterward.
He spent nearly an hour reassuring me that it was really okay, but I kept apologizing over and over.
*****
Tsurugi Kotoha, I will strive to improve.