Tokyo, being a hub for tourism and business, was full of hotels.

From budget accommodations to high-end luxury suites, there was something for everyone.

Toyoko Inn was one such chain, offering affordable business hotels. If you were on a tight budget and needed a temporary place to stay, Toyoko Inn was a solid option.

In a single room at Toyoko Inn Shinjuku Sanchome, Kasugano Sora and Kasugano Haruka were staying together.

Though it was just a single room, the bed was large, and the amenities complete. The layout was compact but comfortable.

The two weren't doing anything special—just hanging out together on their phones. Typical sibling bonding.

After staying in Sora's room until around 10 PM, Kasugano Haruka stood up from the sofa and reminded her, "Sora, go to bed earlier tonight. Don't stay up too late playing on your phone."

"Yeah, yeah, I know."

Without even lifting her head, Sora remained sprawled on the bed, focused on her phone.

Haruka looked at the girl lying on the large hotel bed.

Her long silver hair spread across the bed like lotus leaves. Her pale skin glowed under the light.

Her maturing body and doll-like features stirred something in him—an unexplainable restlessness.

"Is there something else, Haruka?"

Sora hadn't heard the door close and turned to look. She saw Haruka standing there, staring at her blankly.

"No—nothing."

Snapping out of it, Haruka turned and left in a hurry.

"?"

Sora tilted her head in confusion, not understanding what was wrong with her brother.

"Ding ding ding~"

A flood of notifications interrupted her thoughts, and she tapped on one of her group chats.

Eromanga: [Ah, I still don't know how to get along with my new brother. How do you all usually interact with your brothers?]

Komachi: [How? Just talk to him normally, I guess?]

Kotoriko: [Don't ask me. I don't get along with my brother either. Can't help you here, Eromanga-sensei.]

Nao-chan: [Ever since my brother gave up kendo at age seven, our relationship's been strained.]

Eromanga: [Stop calling me that name.]

Eromanga: [I told you, the name comes from Eromanga Island in Vanuatu, not "erotic manga"!]

Kotoriko: [Okay, Eromanga-sensei.]

Eromanga: [Ugh, I'm mad! Kotoriko, I'll draw you into my next doujin!]

Kotoriko: [Oh no, I'm sooo scared~]

Sora watched the endless stream of chat messages, her delicate lips curving into a soft smile.

As a child with fragile health who was often hospitalized, she hadn't had many friends.

It wasn't until she got online that she met this group of like-minded girls.

Among them were a doujin artist trained from childhood by her mother, a girl who modeled for TEEN magazine during middle school, a kendo prodigy who once ranked in the national top 8, a domestic all-rounder who took care of her useless older brother, and a top student at an elite private school.

What did they all have in common?

They were all younger sisters.

And they all had older brothers.

That mutual connection had brought them closer during a casual chat.

Through them, Kasugano Sora began to realize—there really were all kinds of older brothers out there.

Kasugano Sora: [Eromanga-sensei, got any new lewds lately? Drop two.]

She might be meek and quiet in real life, almost mute around others.

But online?

She was a heavy hitter.

Eromanga: [image.jpg]

Eromanga: [image.jpg]

Eromanga: [image.jpg]

...

She sent out several lewd drawings in a row.

Kotoriko: [This group is a menace! I'm reporting all of you!]

Eromanga: [If I draw, don't look then!]

Kotoriko: [Those are two different things.]

In a brightly lit room, a fair-skinned, silver-haired girl with large, clear blue eyes and delicate, youthful features—slim, petite, and nearly flat-chested—stomped her feet on the floor in frustration.

'Every time I look, I have to pretend I'm serious about it. Next time she sends pics, I'm kicking Kotoriko out first.'

Downstairs, Izumi Masamune, who was washing the dishes, heard the commotion and called out, "Sagiri, what's wrong?"

"Nothing."

…

"I'm full."

After seeing the lewd images from Eromanga-sensei, a girl with light brown dyed hair, earrings, and vividly polished long nails put down her chopsticks, ready to leave the dining table.

"You're done eating already, Kirino?" Kousaka Kyousuke looked at her bowl, barely touched, and couldn't help but ask.

"Mind your own business!"

Without looking back, Kousaka Kirino snapped at him and walked out of the living room.

As soon as she left the room, she rushed upstairs, locked the door behind her, and entered her bedroom.

Her room was about eight tatami mats in size, decorated predominantly in shades of red.

Lifting the bed curtain, she sat down like a pilgrim and eagerly opened the lewd images.

She didn't care for lewd drawings in general—but she did love the cute girls Eromanga drew, especially the sister-type ones.

She loved them.

…

"Eeeek!!!"

A girl with a prominent ahoge screamed when she saw the image sent by Eromanga-sensei.

Her little antenna of hair stood straight up like a radar.

"What's your problem?"

Hikigaya Hachiman, who had come downstairs to make coffee, looked at her with a frown.

"N-Nothing."

Hikigaya Komachi jumped up from the couch like a spring.

"Uh, I'm going upstairs to study!"

"Your phone—"

"Nothing's on it!"

Watching his sister run upstairs with her phone hidden behind her back—without grabbing any textbooks or notes—Hikigaya Hachiman's dead fish eyes were filled with disbelief.

What kind of "studying" was that supposed to be?

Once back in her room, Komachi panted slightly and stared at the chat group called "Little Sisters Are the Best."

She silently made a vow.

If she were ever in a car accident and about to die, she would definitely factory reset her phone.

If the chats in this group were ever exposed, she'd be utterly ruined.

Think boys talk dirty?

Wrong.

If you've ever read a girls' group chat, you'd understand what real levels of indecency look like.

Their imagination went far beyond what anyone expected.

…

"Eh? Eh??"

In a bathroom filled with warm steam, a short-haired, rather busty girl stared in shock at the image Eromanga had sent.

Weren't they just having a normal chat earlier?

How did it suddenly turn into lewd pics?

So… the true nature of all things is really just lewdness?

Should she open the image or not?

"Suguha, I'm heading to work. Don't soak too long in the tub, and remember to tell Kazuto it's his turn next!"

Hearing her mother's voice, Kirigaya Suguha nearly dropped her phone into the bathtub.

"G-Got it!"

…

Upon seeing the lewd image, Kasugano Sora didn't open it right away. Instead, she first went to lock the door.

Only then did she save the image and crawl under her blanket.

The blanket was for… viewing comfort.

After making herself cozy, Sora finally opened the image, ready to harshly critique it.

But what Eromanga had sent wasn't just a solo sketch.

These were exclusive group-only "bonus" illustrations.

There were both male and female characters in the drawings.

If she posted this stuff online, it'd probably sell like crazy.

"Eromanga-sensei's skill has really improved."

Sora zoomed in to admire the first image—the sensual quality of the stockings alone was on par with something out of a MiHoYo promo.

Even up close, it was incredibly well drawn—better than anything from recent weeks.

In fact, it was almost comparable to the top-tier doujin master, Kashiwagi Eri.

Speaking of Eri-sensei, Sora felt a bit regretful.

Apparently, the artist recently fell in love, got dumped, and stopped drawing doujinshi altogether.

Now all she did was mope online with messages like:

"If I'd met you sooner, would things be different?"

"Even if you leave me, I hope you'll be happy."

"I miss you. Can you hear me?"

Sora and her fellow fans were dying of curiosity.

Who the hell was this person powerful enough to destroy a doujin emperor?

Kashiwagi Eri quitting was a huge loss for the industry. Her girls were drawn until they looked like cream puffs, for heaven's sake. It was unreal.

Sora sighed at the loss of a legend, all while admiring Eromanga-sensei's technical brilliance.

As she looked on, Sora instinctively pulled the blanket over her blushing face, curled up with her knees together.

No good.

This was too lewd.

She had to see it again.

Because this time, the protagonist was a silver-haired pretty boy—Sora's ultimate weakness.

She adored characters like that.

To her, silver hair was like thigh-highs to boys.

But after staring at the images for a while, she began to frown.

Normally, Eromanga-sensei's characters had generic or abstract faces.

The male leads might be athletic dark-skinned boys, pudgy bald teachers, or even faceless silhouettes.

But this time… the man had a defined, chiseled face, a tall frame, and a pair of flirtatious, upturned eyes with a wicked smile.

Why… did he look so much like her cousin—Kitahara Takashi?

In her hotel room, Sora was already half-hiding her face under the blanket.

Now, upon realizing the man in the image wasn't just similar, but was definitely Takashi, she buried her whole face under the covers.

'Am I seriously looking at a doujin of my cousin?!'

Once the thought took hold, everything changed.

Her pale cheeks turned crimson.

She curled into a tight ball, legs squeezed together.

She slammed her phone shut, determined to forget the image.

But memory is a strange thing.

The more you want to remember something, the harder it is.

The more you want to forget, the more vivid it becomes.

Like when a teacher tells you to memorize a textbook paragraph—you blank out.

But when your friend talks about a light novel you both read? Boom, you recite the entire chapter like you wrote it.

Sora was now in exactly that situation.

Each lewd image was burned into her memory.

Eromanga-sensei wasn't just some average illustrator—she was a near-Emperor-level doujin artist.

A half-step away from the peak of the industry.

The better the artist, the more lifelike the drawings.

And since Sora had just seen Takashi in person today, the mental link between the man and the art was unbreakable.

She was experiencing true 2D-3D fusion.

Stronger than any video.

Never underestimate a girl's imagination.

Curled under the blanket, Sora couldn't tell whether it was too hot, too stuffy—or something else entirely—but she suddenly felt short of breath.

What did it feel like to see your cousin as the lead in an adult doujin?

A shame spiral of cosmic proportions.

Even worse—Sora had kind of gotten into it earlier.

Not because she liked Takashi—her first impression of him was terrible.

She just liked silver-haired boys.

But after realizing the boy in the picture was her cousin, not only did she not lose interest… she felt even more excited.

Maybe it was just her hormones acting up.

Or maybe…

She was just a bit messed up in the head.

Because, come on—he was her cousin.

…

Elsewhere in a cramped Tokyo apartment, a silver-haired beauty with striking features frowned as her phone buzzed again and again.

Opening it, she saw yet another lewd image posted to the group. Her face turned to stone.

When they first met, the "Little Sisters Reign Supreme" group had been normal.

They'd complain about their brothers, share daily life stuff—it was all pretty wholesome.

But someone had started posting lewd stuff.

And slowly, one after another, the whole group got corrupted.

As everyone knows: once a single person in a chat starts going lewd, that group is doomed.

Shirogane Kei absolutely hated this behavior.

She believed girls weren't supposed to be like this.

Just as she was about to scold them and post some study materials to purify the group, she suddenly saw:

Komachi: [Huh? Is it just me, or does the male lead this time look like that super popular guy lately?]

Kotoritori: [You mean Takashi.]

Komachi: [Ah, yes, that's right!]

Eromanga: [Yep, I drew him as the reference. It was a commissioned doujin this time.]

Naonao: [So the male lead had a model this time. No wonder the art looks so good.]

Kitahara-senpai?

This is a doujin of Kitahara Takashi?

Shirogane Kei's typing froze, her pupils flickering like candlelight.

Eromanga: [Ah crap, Kei's online! Did you all save the images? I'm deleting them—otherwise she's going to lecture us again!]

Just before Eromanga could delete the image, Shirogane Kei quickly hit save.

But because her internet was slow, the download didn't complete.

Shirogane Kei: "...."

Five minutes later, Izumi Sagiri received a private message from Shirogane Kei: [You there?]

___

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