Mash-up Anime World: Creating the SCP Foundation to Contain Anomalies

Haruto already had a fairly comprehensive understanding of Tendo Kisara's situation from the anime and light novels he'd seen before crossing over.

Now, as Kisara talked about her past, there was no doubt she was trying to draw closer to him.

She wasn't lying. She didn't even try to hide her desire for revenge.

She was completely sincere.

Trying to win over Haruto's help.

If someone with Haruto's terrifying combat strength were to assist her, the odds of a successful revenge would increase dramatically.

But unfortunately, even after they arrived at the hospital, Haruto didn't give any kind of response.

When the nurse in the dialysis room saw Kisara, she immediately rushed over with familiarity.

"Kisara-san, you're finally here. You're already over an hour late for your appointment. This is a life-or-death matter, and we couldn't contact you. I was really worried!"

Kisara responded with an apologetic smile.

Then, the nurse's attention quickly shifted to Haruto.

"Is this Satomi Rentaro? You're finally here to accompany Kisara-san to her dialysis session. If you're not busy in the future, please come with her more often! She's a patient, you know!"

Obviously, this was a misunderstanding.

Kisara gave a wry smile.

"He's not Satomi."

The nurse immediately froze in place.

After an awkward silence, she quickly supported Kisara and whisked her into the dialysis room.

Inside, Kisara lay down on a hospital bed with the nurse's help.

While prepping the equipment, the nurse started gossiping cheerfully:

"Kisara-san, so he's not the Rentaro-san you mentioned? Is he your boyfriend then? Well, that makes sense. That Rentaro guy never seemed to care about you. He's never even come with you to such an important treatment. But this man is so gentle. I mean, the way he looks at you, it's full of warmth. And that princess carry...

Wow, it's so romantic!"

Kisara wanted to explain.

But the nurse was rattling off at full speed, leaving no room for interruption.

And once the dialysis machine was connected, Kisara no longer had the energy to speak.

She closed her eyes.

Her mind was in turmoil.

Satomi Rentaro had never accompanied her for dialysis—not because he didn't care, but because Kisara had refused him.

It was part of her stubborn pride.

Just like when she insisted on attending a prestigious girls' academy, despite not having the money—out of sheer dignity.

Undergoing dialysis symbolized the pain of losing her kidneys.

And that pain reminded her of the hatred she bore for the Tendo family.

Kisara didn't want to drag Satomi Rentaro into her revenge.

After all, he was adopted by the Tendo family.

Even after all the suffering, he still held a light in his heart.

He had always maintained a neutral stance toward her revenge.

Because what Kisara wanted was to destroy the entire Tendo family, to kill everyone within it.

Something Rentaro could never accept.

That's why Kisara rejected his help.

But Haruto...

Kisara felt he was a good man, though perhaps not the same type as Rentaro. Of course, it didn't really matter since Haruto hadn't shown any sign of wanting to help.

In her tangled thoughts, Kisara drifted off to sleep.

Today, her strength had been thoroughly exhausted.

Both physically and mentally.

—

Meanwhile, Haruto stood just outside the dialysis room.

He gazed at the people walking down the hallway.

"Seven, eight, nine..."

With every person that passed, Haruto counted silently.

Earlier on the street, because it was late and the sun was setting, there hadn't been many people around.

So he hadn't noticed.

But now, looking carefully...

Haruto realized—

The people of this world... were practically extinct.

From the moment he arrived in this world, Haruto had felt a nauseating sensation.

Mental contamination accompanied the Gastrea virus.

It was widespread throughout this world.

After meeting Kisara, Rentaro, and the little Cursed Children girls, Haruto had assumed the mental contamination was too weak to affect the populace.

But reality proved otherwise.

He had simply experienced survivor bias by only encountering people who weren't yet affected.

Now, when he looked again...

Almost everyone he saw had already been severely eroded by mental pollution.

Their perception had been twisted beyond recognition.

Courage, hope, all wiped out.

Even AA-level memory erasure wouldn't work on them anymore.

Because the pollution wasn't just attached to isolated memories—It infected almost all of their cognition.

And cognition is mostly composed of memory.

To erase all that would be the same as erasing the person entirely.

In the SCP Foundation's world—where human bodies, genes, even atomic structures could be altered—the standard for defining a human was cognition.

By that measure...

Most people in this world were no longer human.

Realizing this, Haruto suddenly understood everything.

No wonder things felt off before.

With such widespread loss of cognition, the hatred and rejection toward the Cursed Children made sense.

After all, these people had lost what made them human—like empathy, courage, and compassion.

Now, only a small number remained truly human—Those with high cognitive levels or those still young enough to have avoided long-term exposure.

From his coat pocket, Haruto took out an industrial-use steel pen.

He removed the cap and held it in hand.

His irises shimmered with rainbow light.

The pen tip drew across the air—

And a crisp shattering sound echoed across the world.

In an instant, the gray filter over the world vanished.

But this did nothing for the people already contaminated.

There was no restoring them.

And so, Haruto made his final judgment about this world.

At that moment, the dialysis room door opened.

The nurse poked her head out.

She waved Haruto over.

When he approached, she pointed toward the bed where Kisara had fallen into deep sleep.

"Kisara-san seems really tired. Could you do us another favor?"

Haruto was speechless.

The nurse was giving him a look that clearly meant "You know what I mean".

Obviously, she was trying to make up for her earlier mistake.

So Haruto walked over and gently picked up Kisara.

After nodding at the nurse, he walked out.

The nurse watched him leave.

And sighed in relief.

"Thank goodness I didn't ruin Kisara-san's relationship. Phew~! To make a super gentle and handsome boyfriend angry... I'd be a sinner for the ages! Wah! Kisara-san, you have to be happy! Waving~~!"

After numerous dialysis sessions, this nurse had gotten quite close to Kisara.

Even though Kisara never spoke of her past or troubles—After so long, the nurse could feel the heavy burden and loneliness Kisara carried.

That was why she had complained so much about Rentarou earlier.

Deep down, she just wanted Kisara to meet someone good and live happily.

—

Now, with Kisara in his arms, Haruto quietly walked through the streets.

His gaze swept over passersby from time to time.

With each person he counted, the conclusion he had come to was more and more confirmed.

Perhaps due to the cool night breeze—

Kisara shivered slightly and curled a little deeper into Haruto's embrace.

Moments later, she opened her eyes.

When she realized her current position—

Her ears flushed red.

It was different from before—she had regained her strength. This wasn't involuntary.

And... she might have just snuggled on her own.

As Kisara opened her mouth to say something—

"Where do you live?"

Haruto's calm voice rang by her ear.