How to Enjoy a Common Sense-Altering World

Chapter 4: An Unexpected Visitor 

Late evening. I frowned at the sudden doorbell. Though I wanted to ignore it, my family treated Jung Sahwa so politely that I reluctantly let her in. When Jung Sahwa said she wanted to speak with me alone, my family left the house without hesitation. 

'That's new. I've never seen Father so polite.' 

Before they left, I recalled Father's respectful expression towards Jung Sahwa. My usually stoic, emotionless father looked nervous for once. His deferential attitude made me realize Jung Sahwa must be quite an important person. 

'Who is she?' 

My first impression was her height. She was tall, nearly 2 meters, but that's not why she seemed big. Her enormous breasts were the largest I'd seen today, like she had two watermelons strapped to her chest. How does she even walk around with those? They must bounce painfully with each step. 

Jung Sahwa noticed my stare and spoke: 

"Please don't mind the breasts. Let's speak candidly." 

"Ah, yes." 

So she was aware. I suppose it would be harder not to notice them. But how could any man not stare at breasts that size? Only a saint could resist looking... 

"We created the common sense-altered world." 

"...Pardon?" 

For a moment, I felt a shock from my ears to my brain. Did I hear that correctly? My mind refused to process her words. But Jung Sahwa calmly continued her explanation: 

"To be precise, it was done by the former director of EPA who passed away a month ago." 

"EPA?" 

"Yes. Ero Phenomenon Administration, the government agency that manages erotic phenomena." 

The atmosphere suddenly turned serious. An erotic management agency? I couldn't help but snort at the ridiculous name. But Jung Sahwa explained in a grave tone: 

"It may sound like a joke, but we play a crucial role." 

"How crucial could it be..." 

"We protect each nation's existence and humanity itself." 

It was more significant than I thought. This wasn't just some agency with a silly name. If her words were true, they could be called gods. 

'Ah, so that's why Father...' 

I finally understood Father's reaction. This woman had an incredibly important job. To ordinary citizens like us, she was practically royalty. 

But I still didn't understand why they called themselves an "erotic management agency." Couldn't they just be called a human preservation agency or something? 

"Our original role was to secure, restrict, and protect erotic items." 

"So the common sense alteration was..." 

"Yes, it was a byproduct created by an erotic item." 

A chill ran down my spine at Jung Sahwa's explanation. This was potentially more dangerous than nuclear weapons. A tool that could easily conquer the world. To think such an incredible item was used to create this bizarre world. I was speechless. 

'Is she here to capture me?' 

If they judged me as an anomaly in this world and wanted to eliminate me, this could be a dangerous situation. An agency that created this insane world with just an item. Getting rid of one person would be nothing to them. 

'Should I run?' 

I glanced around, looking for escape routes. But I sensed we were already surrounded. There were too many presences outside to escape. Running seemed futile. 

"Please don't be alarmed. We have no intention of harming you." 

"Really?" 

"Of course. Quite the opposite, in fact." 

Jung Sahwa took a deep breath and handed me an envelope. It was labeled "EPA Official Member Exam." 

"Mr. Kim Jinwoo, would you like to become a director of the Erotic Management Agency?" 

*** 

'Director, huh.' 

Lying in bed, I pondered Jung Sahwa's offer. The director position was currently vacant. But that hadn't caused any major problems. There wasn't much work to begin with, and they spent most days just having sex. 

However, before the previous director passed away, he left an important message in his will. Along with the director position, he was passing on ownership rights to the common sense-altering device. There were other detailed conditions, but the ability to use the device was a huge deal. 

It would be possible to maintain the current world, or revert it to how it was before the change. Alternatively, it could even be used to create an even more twisted world. The EPA executives were eager to quickly appoint a new director, but... 

'Thanks to that, I regained my sanity.' 

The conditions were as follows: 

First, the executives would nominate director candidates. 

Then, they had to restore the world to its pre-altered state. 

That's how I was nominated as a director candidate. 

By the way, the executive who nominated me was Jung Sahwa. 

'I knew she was impressive, but I didn't expect her to be an executive.' 

While amazed at her importance, I pondered what to do next. 

According to her, we could revert the world to its pre-altered state. 

Whether we do that or not isn't really my concern. 

But I worried about the other candidates besides myself. 

They might be satisfied with the current world. 

But what if they create an even more horrific world? 

Or what if they kill all men except themselves? 

'I have to prevent that at least.' 

To prevent such things from happening, 

I need to become the director or help another candidate. 

For that, I first need to be recognized as an official member. 

'Let's use this first.' 

Having decided on a direction, I took out a glass marble from my pocket. 

Before Jung Sahwa left, she gave it to me as a gift. 

It's an erotic item. 

Infinite stamina. 

A B-grade erotic item that grants literally infinite stamina. 

Following Jung Sahwa's instructions, I rubbed the marble on my testicles. 

It slowly melted and was absorbed. 

With this, I can ejaculate endlessly without getting tired. 

I want to test it right away, but... 

It would be a waste to just masturbate alone. 

I'll check it out during tomorrow's membership exam. 

I put on the underwear I had taken off and lay back down on the bed. 

Then, a knock broke the late night silence. 

"Hey, are you sleeping?" 

"Sis? Why at this hour..." 

"I'm coming in." 

My sister nonchalantly entered the room as if it were her own. 

Though I'm not usually surprised by her actions, 

Her outfit as she entered was quite shocking. 

Bunny girl cosplay. 

The original bunny girl outfit taken to the extreme. 

An unbalanced outfit that covers what should be exposed and exposes what should be covered. 

It's not an outfit you'd normally wear in real life. 

But my sister proudly shook her breasts, showing off her bunny girl cosplay. 

"What's going on?" 

"I said I'd come earlier, remember?" 

"Ah..." 

I had forgotten because of Jung Sahwa. 

I remembered she said she'd come to my room during dinner. 

'But why?' 

Even so, this doesn't answer my questions. 

I've been shut in my room for a year. 

During that time, my sister never once entered my room. 

Not even once. 

But now she suddenly visits, and so late at night too. 

Something doesn't add up. 

As I quietly watched my sister standing with folded arms, 

She suddenly sighed and bowed her head. 

"Let me lick your ass one more time." 

"..." 

"..." 

"I said let me lick your ass! Like before!" 

When I didn't respond, she pleaded as if shouting. 

It's not that I didn't hear her. 

I just doubted if I heard correctly. 

In this common sense-altered world, maybe this is normal. 

But my sister's rimming request still made me dizzy just hearing it. 

I quietly pressed my brow, and my sister, after gauging my reaction, stood up and mumbled: 

"It was my first time." 

"Well, rimming isn't usually preferred..." 

"No, I mean it was my first time cumming." 

She came for the first time. 

It's not just about going somewhere. 

Climax. 

My sister is saying she reached her first climax while licking my ass. 

"Have you tried masturbating?" 

"Of course. What do you take me for? I've never cum, it just hurt." 

When I asked just in case, I got an unexpected answer. 

It's a bit confusing, but this was an issue from before the common sense alteration. 

Anorgasmia 

A sexual dysfunction where you can't feel sexual arousal. 

It's clear my sister is in a state of anorgasmia now. 

"Did you go to the hospital?" 

"I did. But they don't know the cause." 

Anorgasmia of unknown cause. 

Even the hospital must have been at a loss. 

But to think my sister's first orgasm was from rimming. 

And not just anyone, but my ass. 

It's a shocking situation, but I guess we've found a clue to treat her anorgasmia. 

"Then if you do it to a boyfriend later..." 

"No. It won't work." 

I offered a plausible solution, 

But her reply was filled with certainty. 

How can she be so sure without trying? 

Her voice carried the confidence of someone who couldn't possibly be wrong. 

"Because I've already tried." 

"You did? When?" 

"Just now. But Mom was the partner." 

Oh god, Mother. 

Even if it's your daughter's request, isn't that going too far? 

I smacked my forehead at this unwanted information. 

Who on earth went wrong first? 

My sister asking to lick ass, or my mother offering hers at her daughter's request. 

Either way, it seemed strange to me. 

Apparently she first tried to ask Dad, but he was already asleep so she asked Mom instead. 

Anyway, let's erase the rimming story from my mind. 

Back to the anorgasmia discussion. 

"So you've never felt anything until now?" 

"That's right. Until I licked your ass." 

"Hmm..." 

It's hard to believe without seeing it myself. 

Maybe she came from some other factor. 

Perhaps she misunderstood due to the situation at the time. 

With that thought, my sister's breasts came into view. 

My sister's breasts, proudly shaped like water droplets. 

Even with nipple patches covering them, they aroused male desire. 

"Then can I touch your breasts?" 

"Huh? Why are you asking? Just touch if you want to." 

"R-really?" 

"This is common sense, isn't it?" 

Common sense 

It's already altered common sense, but my sister doesn't question it. 

She probably wouldn't mind even if her brother like me touched her. 

-I'm taking some money. Huh? You're complaining about just this much? 

-Hey, make me some ramen. 

-This is why you're no good at studying. 

Memories of the humiliation I suffered from my sister before the common sense alteration flashed by like a kaleidoscope. 

Yes, this is revenge. 

It's definitely not crossing a line out of lust. 

Burning with anger in the name of desire, 

I grabbed my sister's ample breasts. 

"Wooaahh!" 

"Huh?" 

Splurt! Splurt! Spluuurt! 

As if proving her anorgasmia was a lie, she sprayed intense fluids. 

*** 

My vision turned white. 

Like fireworks exploding in my head... 

My mind is hazy from this first-time sensation. 

What on earth just happened? 

With my barely recovered vision, I looked at my brother. 

Always so clumsy and useless. 

The brother who locked himself in his room a year ago after fighting with Dad. 

And now he's worried about me as I spray fluids for the first time. 

"Are you okay? Does it hurt anywhere?" 

"No..." 

Nothing hurts. 

My body was just shocked by its first real orgasm. 

How did I cum? 

Despite countless attempts, I've always failed before. 

I've never had an orgasm even once. 

At most, I barely came when I licked my brother's ass. 

That's why, late at night, 

I came to my brother's room to ask. 

Just once, please let me lick your ass again. 

But my brother's reaction wasn't very good. 

I knew it. 

After all I've done to him until now, 

He wouldn't agree just because I suddenly asked. 

Just as I was about to give up, 

My brother suddenly asked if he could touch my breasts. 

Why ask that? 

He could just touch if he wanted to. 

My brother hesitated for a moment. 

Then he reached out to my breasts. 

And I came. Very intensely at that. 

Why? 

This time I didn't even lick his ass. 

I came just from him touching my breasts. 

My body, which never reacted even to electrical stimulation before, 

Reached climax from a single touch of my brother. 

'Then maybe I...' 

Kyuung 

Just thinking about it made my womb react. 

I guess that was the right answer. 

"Hey." 

"Huh? What?" 

"Touch me again." 

I revealed my bare breasts, removing the nipple patches. 

My nipples were in an inverted state. 

I showed him my shameful parts, which are called hamori, as I begged. 

My brother looked at me with surprised eyes. 

"Uh, uhh?" 

Maybe it was my brother's gaze. 

My nipples that had been hiding shyly until now suddenly popped out. 

Even though there was no stimulation at all. 

No wonder my brother was surprised. 

He caressed my breasts, then grabbed them roughly, deforming their shape. 

"Woaahh! I'm cumming! Cumming again!" 

Splurt! Spluurt! Spluurt! 

I came again, spraying fluids uncontrollably at my brother's touch. 

I finally understood. What my true nature is. 

'I love my brother. My blood-related brother. I desire him as a man.' 

Why did I realize this so late? 

All those days I wasted sending him away. 

Why did I take so long when he was right next to me? 

If I had known, I would have given my virginity to my brother, not a dildo. 

As I became honest with my feelings, 

I clearly knew what I had to do now. 

I spread my legs as I sat on the edge of the bed. 

When I spread my swollen pussy, the love juices that had built up overflowed. 

This is the best courtship I can do now. 

The rest is up to my brother's choice. 

'Ah...' 

I looked into my brother's eyes. 

Those aren't the eyes of someone looking at family. 

They're the eyes of a beast about to devour its prey. 

His dick was rock hard, visible above his underwear. 

When he took off his underwear, his lovely brotherly dick stood tall, throbbing. 

"Come here. Fuck your sister's dirty, perverted pussy that desires her own brother." 

"Huff... huff..." 

I came lightly just from my brother's rough breathing. 

As he grabbed my shoulders roughly, 

My womb trembled as if all preparations were complete. 

Then his dick aimed at my pussy and started to push in. 

"It's here0! My brother's extreme dick0 has come to a place it shouldn't0!" 

Splurt! Spluurt! Spluurt! 

I sprayed fluids all over my brother's stomach like I was peeing.