My sister Arisu Sakayanagi is a yandere

I am honestly surprised that so many people are responding. When I go on hiatus, usually only two or four people comment, and I get a stingy 4-8 power stones, which makes me too lazy to even come back to my old story.

So, yeah, before I truly return, I will create a vote here. You need to judge what kind of writing style you prefer—my old version or the new one—based on my next chapter.

The old version has a short word count, a casual tone, and a much faster pace. But in the newer version, I write with great detail. Every gesture in dialogue, every expression, and even the sex scenes will be much more detailed than in the old version, but at the cost of a slower pace.

You get the gist—my old writing style is mostly used by Chinese authors, while my new writing style is much more professional and follows RoyalRoad's level of detail.

Read all of my chapters to judge them. I will use "Old" and "New" behind the chapter name, and once you've read both, go to the very end of the chapter and vote for the writing style you prefer!

Chapter 9: Is It Wrong for Me to Bang My Own Sister on the First Day of School? (Old Version)

Life is both boring and intriguing at the same time. On one hand, the happiness of banging my own sister and the taboo sensation from it is amazing. Yet, it sucks at the same time because I have to repeat the boredom of life—named reality—being stuck in a boring school again with boring people. Luckily, not everyone is boring. There is an interesting girl who can match my intellect. She is Shiina Hiyori, someone I can find common ground with after my sister.

I like intelligent women and their company. It's nice to find someone who has a common ground with me and can hold a back-and-forth discussion about philosophy.

She's a rare gem in a sea of mediocrity.

Hah... what a life.

"Welcome to the Advanced Nurturing High School, mina-san. Every last one of you has been chosen by this school because of your strengths and because you are the most elite among others. Congratulations."

The Council President, Horikita Manabu, began spouting the cliché lines that are spoken at every school orientation. No controversial statements—only cowardice standing up there on the high platform. His speech is cliché and filled with political correctness—subtle and weak.

Boring. Is this an elite school? If I were him, I would mercilessly tear down the hypocrisy of this school on the very first day and force the freshmen to compete against each other immediately. I'd make them wary of other classes, forcing them to fight tooth and nail rather than playing this pathetic game of "friendship." I would tell them that everyone is unequal—that the weak will drop out while the strong reign supreme. The strong can do whatever they want in this school, while the weak are nothing but slaves. That is what I would do as Council President.

Unfortunately, he is too conservative—probably a coward who only dares to pursue stability rather than thrive in chaos.

As Council President, he is supposed to promote brutal competition, not this pretentious speech. But what else should I expect from a mediocre guy like him?

At least he is morally better than me. Unlike me, he's not banging his own sister.

Speaking of banging my sister, I shift my gaze to Horikita Suzune. Her glacier-like eyes meet mine, her cold gaze so piercing that any simp web novel MC would probably orgasm from a mile away. She has jade-like skin, a frosty temperament, and the typical xianxia heroine template. It's like the Japanese author lost inspiration when creating her and just copied a Chinese xianxia heroine instead.

"You… what are you looking at?" she asks me with a condescending tone.

I ignore her without hesitation. I hate talking to narcissistic, arrogant women who are full of themselves.

"Hey, you, I'm talking to you."

I couldn't care less about her bullshit, so I leave just as the Council President finishes his speech.

Then, by accident, I slam right into my sister because I wasn't looking. Naturally, she turns the accident to her advantage and clings to my chest.

"Fufufu… you seem to be popular with women, brother." She grabs my arm and smirks at Horikita. "Are you perhaps one of my brother's suitors?"

Horikita Suzune's face darkens. Her ego must have taken a hit after being accused of being a stalker—especially when everyone around us turns their attention toward our little exchange. What a brilliant way to shift the fact that I was staring at her first into making it seem like she was stalking me instead.

I watch their little drama with interest. Like any cultured man, I love watching women fight the most.

Everyone else present seems to share my sentiment, watching my sister and Horikita glare at each other with hostile expressions. The only exception is Manabu, whose eyes are filled with disappointment as he stares at Suzune. He shakes his head and leaves.

"Your brother is the one who started it first!" Horikita Suzune spits venomously.

"I don't think so. Everyone here can see that you started the argument first. My brother was just minding his own business." Arisu tightens her grip on my arm, defending me without hesitation. There is no doubt or hesitation in my sister's voice as she refutes Horikita's accusations. She doesn't buy her bullshit and asserts our stance with unwavering confidence, leaving Horikita at a loss for words.

That's the difference between an alpha male's woman—a Stacy—and a simp's girlfriend—a gold digger.

When an alpha male is accused, his woman defends him without hesitation. But a simp's girlfriend is different—she questions him, believes the lies of others, and humiliates him in public without a second thought.

Whether right or wrong doesn't matter. What an alpha male's woman seeks is a man whose authority is never questioned in public. She will defend his reputation no matter what.

That is the difference between an alpha male and a simp. Between a devoted girlfriend and a gold digger.

And that's how you test a woman's loyalty. If she easily buys the lies of strangers and questions your authority instead of defending you, it means she isn't loyal and that her love for you is fragile. But if she stands by your side and asserts your innocence—even when there is evidence against you—then congratulations. You have a devoted, good woman who will stay by your side even in your worst times.

Knowing this, I am very pleased with Arisu and stroke her hair as praise.

"Good job, sister. I'm happy that you trust me."

"See? Can you at least step aside? You're embarrassing yourself," I assert.

"Hmph. You won't get away with this," Horikita Suzune snorts and walks away.

I watch her retreating figure with a thoughtful look.

Most of the freshmen leave as well after realizing that there is no more drama to watch. Some remain, chatting with their acquaintances before heading to class.

"Happy, brother?" Arisu whispers. Her seductive breath tickles my ear.

I don't know why, but I get hard from just this simple gesture.

Am I really that horny?

"How about I help you, brother?"

She knows exactly where this is going.

"It would be appreciated," I reply in a hushed tone.

With that, she drags me to a secluded place, devoid of cameras.

Yeah, it's incest time!

...

Chapter 9: Is It Wrong for Me to Bang My Own Sister on the First Day of School? (New Version)

Life is boring and intriguing at the same time.

On one hand, the sheer euphoria of indulging in the forbidden pleasure of fucking my own sister fills me with an indescribable thrill—a taboo sensation so intoxicating that no words could ever do it justice.

But on the other hand, reality is utterly suck, an unrelenting cycle of monotony that drags me back into the suffocating boredom of everyday life.

The dull, lifeless routine of attending school, surrounded by uninspired fools who lack even a fraction of my intellect, makes me wonder if this existence is nothing more than a sick joke played by the universe.

Luckily, not everyone around me is completely devoid of intrigue.

Amidst the sea of mediocrity, there exists a rare gem—someone whose intellect matches my own, someone with whom I can converse on equal footing.

Her name is Shiina Hiyori, a girl who, after my sister, is the only person I can genuinely connect with on a deeper level.

I have always had a particular fondness for intelligent women. Their presence is intoxicating, their minds sharp enough to engage me in a battle of wits that keeps me from drowning in the abyss of stagnation.

It is an unparalleled pleasure to find someone who shares common ground with me, someone with whom I can debate philosophy, exchange ideas, and revel in the art of intellectual discourse.

She is a true rarity, a shining diamond in an endless pit of coal.

Hah... what a life.

"Welcome to Advanced Nurturing High School, mina-san. Each and every one of you has been carefully selected by this prestigious institution for your unique strengths. You stand as the elite among the elite. Congratulations."

The voice that rang through the auditorium belonged to the Student Council President, Horikita Manabu.

He stood tall on the high platform, his expression as lifeless and uninspired as the speech he was delivering.

A tedious, uninspired monologue drenched in stale political correctness, lacking even the slightest hint of controversy or challenge.

The very essence of cowardice in human form.

Boring.

So fucking boring.

Is this what they call an elite school?

If I were in his position, I would tear through the hypocrisy of this institution without hesitation. I would make it crystal clear from day one that this world is not a playground for the weak.

I would incite ruthless competition, forcing the students to sharpen their fangs against each other rather than deluding themselves with the foolish notion of friendship.

Let them fight. Let them claw at one another, tooth and nail, until only the strongest remain standing. That is the true essence of power. That is the only lesson worth teaching.

In my version of this academy, the weak would be trampled underfoot, expelled without mercy, while the strong would reign as kings, free to bend the rules to their will.

The strong would indulge, take, and dominate. The weak would serve, obey, and be discarded when they outlive their usefulness.

But, of course, Horikita Manabu is nothing more than a conservative puppet who values stability over evolution, content with maintaining the illusion of order rather than embracing the chaotic crucible in which true strength is forged.

Pathetic.

Not that I expected anything different from a mediocre man like him.

At the very least, he is morally superior to me—after all, unlike me, he is not defiling his own sister.

Speaking of which, my gaze shifts to Horikita Suzune, and in that instant, our eyes meet.

Her icy, unyielding stare is a weapon in its own right, sharp enough to make the typical self-insert web novel protagonist convulse in orgasm from a mile away.

Her skin, smooth and flawless like polished jade, only enhances her cold, untouchable beauty. Her demeanor—proud, distant, and exuding an almost ethereal arrogance—feels like something straight out of a xianxia novel.

Perhaps Japanese authors have run out of originality, resorting to borrowing character archetypes from Chinese webnovel.

What a fucking joke.

"You... What are you looking at?" she asked me in a condescending tone.

I ignored her without a second thought, refusing to entertain a conversation with a narcissistic, self-absorbed woman who clearly believed the world revolved around her.

"Hey, you. I'm talking to you."

I couldn't have cared less about her bullshit, so I walked away without acknowledging her presence, my patience far too valuable to waste on an arrogant woman with an inflated ego.

My attention shifted instead to the Council President, who had finally wrapped up whatever tedious nonsense he was engaged in.

As I turned to leave, I accidentally slammed into my sister, not having noticed her in my path. And, as if this was some sort of scripted opportunity, she seized the moment with ease, using it to her advantage.

Before I could react, she was already pressing herself against my chest, her arms naturally winding around me in an affectionate cling.

"Fufufu... You seem to be quite popular with women, brother." Her voice carried a teasing lilt as she snaked a hand around my arm, her fingers gripping me possessively.

She then turned to Horikita, her gaze sharp and smug.

"Are you perhaps one of my brother's suitors?"

Horikita Suzune's expression darkened immediately, her pride clearly bruised at my sister's words.

To be mistaken for a love-struck admirer—worse, a stalker—while surrounded by our peers was likely an unbearable insult to her ego.

And the way the attention of the crowd had suddenly shifted toward us only made it worse.

What a brilliant way to flip the script. A moment ago, I had been the one observing her, but now, thanks to Arisu's quick wit, the entire situation had been reframed—Suzune was the one under scrutiny, as if she had been the one fixated on me all along.

I watched the unfolding drama with keen interest. Like any cultured man, I enjoyed watching women clash, especially when pride and ego were on the line.

The energy of a good rivalry, the fire in their eyes, the sharpness of their words—it was a sight worth witnessing.

And I wasn't the only one. Every person present seemed just as enthralled by the tension crackling between my sister and Horikita.

Their gazes were locked in mutual hostility, neither willing to back down.

The only exception was Manabu, whose expression was laced with sheer disappointment as he observed the situation.

With a shake of his head, he turned and left, clearly unimpressed with Suzune's behavior.

"Your brother was the one who started this," Horikita Suzune spat venomously, her voice dripping with indignation.

"I don't think so," Arisu countered smoothly, tightening her grip on my arm. "Everyone here can see that you're the one who initiated this argument. My brother was simply minding his own business."

There was no hesitation in her defense—no doubt, no second-guessing.

Unlike the fools who waver when someone accuses their loved one, my sister saw through Horikita's pathetic attempt to twist the narrative and immediately shut her down.

She didn't buy into Suzune's self-righteous nonsense for even a second.

Instead, she stood at the forefront, unwavering, and asserted our stance with absolute confidence, leaving Horikita speechless and at a complete loss for words.

This was the difference between an alpha male's woman—a true Stacy—and a weak, pathetic simp's girlfriend—a gold-digging parasite.

When an alpha male is accused of something, his woman will defend him without question, standing firmly by his side, shielding his reputation, and maintaining his dominance.

But a simp?

A simp's girlfriend will hesitate. She will waver, doubt him, question him. She will believe the lies of others and turn against her own man in public, humiliating him without a second thought. She will strip him of his authority, expose his weakness, and shame him before everyone.

Right or wrong? That was irrelevant.

A true alpha male's woman understands that her loyalty must be absolute.

She doesn't entertain baseless accusations, nor does she allow anyone to challenge her man's position.

What matters is preserving his dominance, ensuring his reputation remains untarnished, and never allowing others to see even the slightest crack in his authority.

That is the difference between an alpha male and a pathetic simp. Between a devoted, loyal woman and a self-serving gold digger.

And that is precisely how one should test the loyalty of their woman.

If she is so easily swayed by the lies of a stranger, readily questioning your authority instead of standing by your side and defending you, then it only proves that her devotion is weak and her so-called love for you is fragile at best.

However, if she defends you with unwavering resolve, asserting your innocence even in the face of evidence laid bare on the table, then congratulations are in order—you have a truly devoted and exceptional girlfriend.

A woman who will remain steadfast by your side, even in your worst moments, is a rare treasure indeed.

Understanding this, I felt immense satisfaction with Arisu's response.

A pleased smirk played on my lips as I reached out, my fingers sliding through her silky hair in a gentle yet deliberate stroke—a gesture of both approval and praise.

"Good job, sister. I'm truly happy that you trust me," I murmured, my voice laced with pride.

"Tch. See? Can you at least step aside now? You're embarrassing yourself," I asserted, eyes narrowing as I addressed Horikita Suzune.

"Hmph. You won't get away with this," she scoffed, her sharp glare lingering on me for a moment before she turned on her heel and stormed off.

I watched her retreating figure with a contemplative look, my mind briefly wandering.

The spectacle had drawn quite a crowd, but as soon as the drama fizzled out, most of the freshmen lost interest and scattered.

Some lingered, chattering among their acquaintances before heading into class.

"Are you happy now, brother?" Arisu's voice dipped into a seductive whisper, her breath tickling the sensitive skin of my ear.

A shiver ran down my spine at the unexpected sensation.

I didn't know why, but my body responded instantly. A simple action, just a teasing breath against my ear, yet it was enough to make me hard.

Was I really that fucking pent-up?

Arisu giggled, her knowing gaze flickering downward before she leaned in even closer, her lips just a hair's breadth away from my skin.

"Shall I help you with that, dear brother?" Her sultry tone left no room for misinterpretation.

She knew exactly what she was doing—what her words implied—and I damn well knew where this was headed.

"It would be greatly appreciated," I replied in a hushed voice, my breath hitching slightly.

A sly smirk graced her lips before she took my hand and led me away, guiding me toward a secluded area, far from prying eyes and devoid of any surveillance cameras.

Yeah. It's incest time.

...

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