The world has gone wrong... Perhaps it has gone right

"No wonder you've been acting so strange, brother. Did Kaguya-sama coerce you into having sex with her?"

As soon as I stepped outside the student council room, my sister, Hayasaka Ai, fixated her sharp, questioning gaze on me.

Her tone made it clear that she demanded answers, and before I could even process her words, she grabbed my arm forcefully, dragging me away.

She pulled me into an empty room, throwing me down into a chair with a look that screamed interrogation.

"I don't understand why you'd even jump to such a conclusion, Ai-chan." I shook my head in disbelief, already having given my answer.

But despite my words, Hayasaka Ai's face still reflected suspicion, as if she didn't believe a word I said.

"Really?" she asked, her voice dripping with doubt.

"I know better than anyone else that a petite figure like Miss Kaguya's isn't exactly the ideal for most men. They usually go for the ones with curves and larger breasts, don't they? So tell me, brother—did she force you?"

Did my sex life really matter to her?

I wanted to ask that very question, but before I could, her grip tightened around my arm, as if she was afraid I'd run away.

Her hold was unyielding, refusing to let me budge an inch as she continued to pin me to the chair, trapping me in her line of questioning.

Since she was so insistent on answers, I decided to give her one, but not without mocking her a little in return.

"I highly doubt whether or not Kaguya-chan coerced me is any of your business, Ai-chan. If you ask me, it seems like you're just jealous. Jealous that your brother is having fun with her, leaving you alone—and that Kaguya is the one who took all of my precious virginity."

Her eyes narrowed, and instead of loosening, her grip on my shoulder tightened even more. Her expression darkened, and for a moment, I saw something dangerous flash in her eyes.

"Be serious, brother. Answer me—did she force you?"

"No," I sighed, exasperated. "She didn't. I enjoyed it. Now, are you satisfied with that answer, Ai-chan?"

I rolled my eyes, placing my hand on hers, which was still gripping my shoulder like a vice.

"Now, release me."

Reluctantly, she obeyed, finally releasing me before sighing deeply.

"Well, in that case, I suppose I'll bless the two of you. However," she added, her voice suddenly shifting to a more serious tone, "there's still one thing I want to confirm, brother. Will you follow me, please?"

I nodded and stood up, agreeing to follow her as she led the way.

"Now, we can talk. Take off your pants, brother," she commanded with a voice dripping in assertiveness, as she led me into a nearby empty classroom.

With a quiet click, she locked the door behind us, sealing off any escape.

I turned to face her, my eyes narrowed in disbelief, my expression a mixture of confusion and stern disapproval.

"Ai-chan, I am your brother. What exactly do you think you're trying to do?"

She didn't miss a beat.

"Did I stutter, brother? Or is there some confusion? Do you want me to take off your pants myself, or would you prefer to handle it?" Hayasaka Ai's reply was as cold as ice, her voice unwavering, almost mechanical in its intent.

"If you're feeling too shy to remove your own pants, perhaps I should give you a demonstration of how it's done," she added nonchalantly.

And with that, she began to unbutton her school uniform, shedding her clothes piece by piece until she stood completely naked before me.

My breath caught in my throat as I stared at her, disbelief and shock warring within me.

I couldn't help but feel the heat rising in my body, my erection already straining against my pants despite my attempts to suppress it.

Her exposed skin, full breasts, and pussy displayed openly before me.

Compared to Kaguya, it can be said that Ai's figure is much more well-developed. Her skin is not only flawlessly smooth, but her breasts are also noticeably firmer and plumper.

Her body, in general, could be described as perfectly designed for sex.

This is especially true when she bends over; her rear, without a doubt, is particularly well-suited for such encounters. Imagining holding her full, firm breasts while thrusting into her from behind evokes a strong lust within me.

However, Kaguya is not without her own appealing qualities.

She has a petite, huggable figure that is easy to push down, giving her a unique allure in comparison to Ai.

Subconsciously, I moved my hand to cover myself, trying to hide the visible bulge from her view, but Ai-chan only chuckled, the sound light and teasing.

"It seems I was right. You really are a pervert, brother. Getting hard just from looking at your own sister… You must have been thinking about this for a while, haven't you?"

Her words cut through me like a knife, and I wanted to deny it, but my body betrayed me.

"Now I understand why you'd accept Kaguya-sama so easily. So, tell me, brother, do you want me to help you with that erection?" She chuckled.

I wanted to say yes, but when I realized my state of mind, I wanted to slap myself for even considering it.

As much as I lusted after Ai-chan, she was my sister in this world, and it felt so utterly wrong.

Yet, despite the clear moral reprehensibility of it all, I couldn't fully comprehend why I still entertained her proposition in the back of my mind.

I fought against my urges, attempting with all my might to resist this overwhelming lust, but no matter how hard I tried, I found myself teetering on the edge of giving in.

I struggled to prevent myself from thinking with my dick, especially now when I had already promised Kaguya-chan a special night.

I shouldn't allow myself to betray her trust like this.

This is wrong—so deeply wrong.

But the words that came out of my mouth were entirely beyond my control.

"Please do, sister."

The moment I realized what I had said, I cursed myself internally, my hand tightening around the waistband of my pants as I fought the urge to give in.

But Ai-chan's teasing smirk never wavered.

"Then take off your pants, brother. How can I help you if you keep covering yourself? Or… would you rather stop here?"

She stepped closer, her lips brushing against my ear as she whispered, "What's it going to be?"

Her breath sent shivers down my spine, and I fought against the overwhelming urge to give in to her advances.

My mind screamed at me to resist, but my body… my body wanted to surrender.

Before I could answer, Ai-chan leaned in, pressing her lips to mine in a sudden, forceful kiss.

Her hand found its way to the bulge in my pants, her fingers tracing along the length of my erection through the fabric.

Inch by inch, she kissed her way down my neck, her lips leaving a trail of heat in their wake.

"Really, brother?" she whispered, her voice soft and seductive. "Even now, when you're this hard, you're still going to refuse me?"

"Enough, Ai-chan. I don't know what's gotten into you, but I think you should leave now," I asserted, forcefully pulling her hand away from me.

Since I made a promise to give my virginity to Kaguya, I am determined to see it through to the end, so I forced myself to stay calm despite everything.

Her eyes slowly regained their clarity as she bowed her head in apology.

"Sorry, brother. I shouldn't have done that."

"I'll take my leave now. Goodbye, brother," she said softly, beginning to gather her dress to cover herself before unlocking the door and hastily slipping out.

I watched my sister for a moment, wondering to myself:

Did she really just escape naked and streak outside?

This world seems to grow stranger by the day.

I shrugged and began to follow her out, trailing behind.

She was no longer a threat, and besides, I still needed her to guide me to my class, as I hadn't yet memorized its location.

Finally, I managed to catch up with her, watching as she slipped into the restroom at school.

When she stepped out moments later, she was no longer naked; instead, she was fully dressed in her school uniform.

But when her eyes landed on me, a wave of panic washed over her, and she instinctively attempted to flee.

However, I quickly grabbed her hand, refusing to let her go.

"Ai-chan, you owe me something, don't you think? It's a little rude to try and run away without paying your debt first, isn't it?" I asked, keeping my voice calm but firm.

"I'm sorry, brother. I know what I did earlier was terrible, and I have no excuse for it." She bowed her head deeply, her eyes filled with a mix of regret and remorse as she acknowledged her mistake.

Her apology softened my heart, and I gently helped her stand upright again.

"There's no need for that, Ai-chan. Now, I need your help. How about this—if you're truly sorry for your actions, you could take me out for a treat?" I offered her a chance to ease her guilt, giving her a way to make amends.

"Thank you, brother. You're the best." She smiled warmly and hugged me tightly. I reciprocated the embrace, sighing quietly to myself.

How had the once cold and strict Hayasaka Ai ended up like this?

Had the world gone mad, or was it just me?

I wasn't sure anymore why both Kaguya and Ai were acting so differently.

They seemed to behave like the men from my world, not like the women I knew.

Could it be that I had somehow ended up in a world where gender roles were reversed?

Where sexual morality was flipped?

I didn't know for certain, but I needed to find out.

"Ahem... Let's head to a karaoke room, Ai-chan. I'd like some peace and quiet, and maybe I could catch up on the news while we're there. Do you think they'll offer that kind of service?" I asked, trying to sound casual yet curious.

"They will, and I'll make sure of it, brother," Ai responded with a firm tone, her usual composure seemingly returning. "For now, let me lead the way. I'll also bring you some ice cream and your favorite cold drink."

I nodded as she began to walk ahead of me, leading the way. I followed from behind, leisurely crossing my arms behind my head as if the earlier encounter hadn't fazed me at all.

The more I acted nonchalant, the more Ai seemed to relax, and the distance between us gradually shrank.

With a soft mutter under her breath, she mustered up the courage to reach out my hand and I understood her struggle and accepted her suggestion as she hold my hand and continued to guide me forward.