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

Kanae clutched the syringe tightly.

If what this young man said was true…

Then, this small syringe was practically a second life for a person.

Even the Demon Slayer Corps members, those whose bodies were torn apart by Blood Demon Arts, could use this solution to be reborn.

If the Pillars could get their hands on this solution, they could continue fighting, continue growing stronger.

Then, even Muzan—

Haruto tilted his head and noticed Kanae's solemn expression, immediately guessing her thoughts.

"You don't actually need to worry about that."

Haruto said something that seemed completely out of place.

While Kanae was still confused, they arrived at a dessert shop. The store's exquisite decor made Kanae's eyes widen slightly. However, they didn't linger inside. Instead, they passed through and headed straight for the kitchen.

Under the operation of the staff, a section of the kitchen wall suddenly opened, revealing an internal alloy elevator.

Still in shock, Kanae was led inside the elevator.

After Haruto swiped his identification card, the alloy doors snapped shut, and the elevator swiftly descended.

The alloy elevator wasn't completely sealed off but embedded with a special type of glass.

This material was stronger than most alloys and allowed for a clear view of the outside world.

This wasn't meant for sightseeing but was a necessary design, if containment breaches occurred and surveillance systems failed, personnel needed to rely on their own eyes to assess the situation.

At this moment, through the special glass, Kanae saw an unbelievable sight.

Alloy corridors crisscrossed in an intricate yet orderly manner, resembling a massive honeycomb. As the elevator rapidly descended, the interwoven corridors grew larger, making it clear just how vast this place truly was.

When the alloy doors finally opened, it was as if another world was unfolding before her eyes.

Kanae was too stunned to speak.

"Welcome to the SCP Foundation containment facility."

Haruto said with a smile.

After that, he led Kanae on a tour of the facility, explaining along the way,

"I actually know a bit about your world, about Muzan and the Demon Slayer Corps."

Hearing this, Kanae's eyes widened.

Even though she had crossed into another world, this young man knew about her world's situation.

"Of course, that's not the main point. The important thing is—I can open a portal to your world."

At this moment, Haruto happened to lead Kanae to the Light Containment Zone.

He opened a particular containment room and pointed inside.

Kanae looked in and saw a swirling, vortex-like portal standing quietly in midair. From time to time, Foundation personnel would step through it, either appearing out of thin air or vanishing into it.

That portal led to the world of Titans, with a containment facility already established on the other side.

Seeing this, Kanae became visibly excited.

She was a Pillar of the Demon Slayer Corps, bearing the mission of hunting demons. If she had died, so be it. But now that she was alive, she had to return and fulfill her duty.

Moreover…

After observing the containment facility for a while, Kanae understood just how terrifying the SCP Foundation was.

Compared to the Foundation, Muzan was nothing more than a lowly creature.

With that realization, Kanae turned to Haruto.

Without hesitation, she dropped to one knee and sincerely pleaded,

"Haruto-kun, please help us… The Demon Slayer Corps has almost no hope of winning against Muzan. Every day, many people are killed by demons, and despite giving our all, the Demon Slayer Corps continues to suffer losses. If you can kill Muzan, I'll accept any condition, even if it costs me my life!"

The usually gentle girl was now more determined than ever.

Seeing this, Haruto quickly helped her up.

Looking into Kanae's pleading eyes, he reached out and gently ruffled her hair.

"Oh, right, I haven't told you the SCP Foundation's mission yet."

Haruto said with a smile.

"SCP stands for Secure, Contain, Protect. Our mission is to contain anomalies and protect humanity. So, even without Kanae's request, the SCP Foundation would have intervened to contain Muzan. As for conditions—there are none. We are an organization that exists for humanity, not for personal gain."

Hearing this, Kanae's purple eyes shone with hope.

The Demon Slayer Corps existed to protect humanity, fighting selflessly.

But she never expected anyone else to understand their struggle or selflessly help them. After all, the Demon Slayer Corps was just a small group, an anomaly in their world.

Most people, even in the face of life-and-death crises, only cared about their own interests.

Haruto's words reminded Kanae of the day she first joined the Demon Slayer Corps.

"Haruto-kun, if I survive after Muzan is contained, can I join the SCP Foundation?"

Kanae suddenly squinted her eyes and smiled.

Haruto was momentarily stunned, then ruffled her hair again.

"If you want to, the Foundation will always welcome you. Besides, Muzan is nothing special, nothing will go wrong."

(T/N: Murphyyy?!

Then again, Michael is just an overgrown bug, I doubt something will go wrong.)

After that, Kanae was taken to a new containment room.

Meanwhile, Haruto went to summon the Mobile Task Force—Wings of Freedom.

For this 'Demon Slayer' world containment operation, Haruto wouldn't personally oversee everything.

Leaving the main world without him could be risky in case of high-threat anomalies. Besides, as Haruto had said, Muzan was honestly quite weak.

The Mobile Task Force could completely crush him.

"You have a mission for us?"

Levi led the Wings of Freedom team in, looking somewhat puzzled.

The Foundation rarely mobilized the Mobile Task Forces unless dealing with high-risk anomalies.

Levi had actually been feeling bored while staying at the Foundation.

Haruto nodded.

"This time, the mission is in another world."

Then, he briefed Levi on the Demon Slayer world's situation.

Hearing this, even Levi's usually deadpan eyes showed a hint of fighting spirit. After all, he was from the world of Titans—

And his world had been saved by Haruto.

Now, it seemed it was their turn to save another world.

"No need to hunt every demon down. Just find Muzan and inject him with this—once he's infected, the other demons will die on their own."

Haruto handed Levi several syringes.

Inside was his own blood—

The Blacklight Virus.

Once Muzan was infected with the Blacklight Virus, all the demons linked to him would explode on the spot.

After all, every other demon was merely an inferior version of him, created from his blood.

Levi Stored the Syringe in the Crimson Armor for Safekeeping The Crimson series of armor had now developed into its third generation.

Compared to the first generation, Crimson-1, the Crimson-3 had received an all-around upgrade—higher, faster, stronger!

Moreover, it was also equipped with an Arc Reactor, making its endurance capabilities terrifying.

However...

"But according to your description, Muzan seems hard to find."

Levi frowned as he spoke.

If there was one thing Muzan excelled at, it was hiding.

He suppressed his aura and blended seamlessly into human society, leaving no trace.

Even his subordinates, the numerous demons under him, had no idea where his true body was located.

In fact, weaker demons weren't even qualified to mention his name, saying Muzan would cause them to explode on the spot.

Secrecy was paramount.

Although the Foundation had advanced biotechnology, it still needed to conduct a thorough search within the human society of the Demon Slayer world.

A carpet search would take time.

Haruto sighed and nodded.

"Yeah, he's hard to find. A full-scale search will waste a lot of time."

It was precisely because of this that Haruto didn't intend to personally intervene in the Demon Slayer world.

Wasting too much time there could lead to another abnormal outbreak in the main world, just like what happened in the Attack on Titan world when he was absent.

Seeing that Haruto had no better solution, Levi simply nodded and prepared to head to the containment area to get things ready.

But just then, Haruto had a sudden idea.

"Levi, prepare another Crimson-3 armor."

Levi didn't question it and immediately went to make the preparations.

--------------------

Meanwhile, Haruto headed toward the residential area.

"SCP-181, The organization has assigned you an Important Mission"

Kanako: ?

The girl had a deadpan expression.

"President! I recall that I've already been removed from the D-Class personnel list, right? Why am I still getting assigned abnormal contact missions? If I die, wouldn't that be a loss for the Foundation?"

Kanako complained.

Haruto pretended not to hear her.

"Don't worry, I believe in you. You won't die."

He was confident that even if he threw Kanako directly into the Demon Slayer world, she would survive on her own.

After all...

SCP-181's super luck wasn't just for show. Besides, she'd be equipped with the Crimson armor.

"No! Please don't trust me so easily!"

Kanako just wanted to slack off and live an easy life.

But in the end, she found herself being carried away upside-down by Haruto, her feet in the air.

Since searching for Muzan was essentially a luck-based task, it made sense to use Kanako, it would definitely double the efficiency.

--------------------

On the way back to the containment area, someone called out to Haruto.

It was Ai Hayasaka.

This surprised Haruto.

After all, Hayasaka was rarely at the site. She was usually on field duty.

Since the Foundation had grown in numbers, Haruto had finally been able to fulfill his promise to give Hayasaka some well-deserved rest.

So seeing her at the site now was quite unexpected.

Meanwhile, Hayasaka, upon seeing Haruto carrying a girl by her feet, couldn't help but twitch her lips.

As expected, this shameless president never failed to pull off some ridiculous stunts.

"What's up, Agent Hayasaka? Have you been slacking off for too long and now want to contribute to the Foundation again?"

Haruto asked curiously.

Hayasaka rolled her eyes.

Did she look like a workaholic?

If not for serving Lady Kaguya...

If not for saving up her own dowry...

Hayasaka would've quit a long time ago.

"This is for you, President. It's not work-related, it's a personal invitation."

Hayasaka handed Haruto a golden invitation card.

Haruto glanced at it.

It was an invitation to a party jointly hosted by the Shinomiya, Suzuki, and Sanzaemon families.

These three families, aside from the Momobami Clan, were the other members of the Four Great Financial Conglomerates.

Clearly, this party was a gathering of the most powerful figures in Japan.

Setting the invitation aside, Haruto looked at Hayasaka in confusion.

"Why should I go?"

In the past, he might've been interested in attending such an event to bring Japan's elites under his control.

But now that he had the Momobami Clan on his side...

Given time, the Foundation's power would inevitably allow the Clan to crush the other three conglomerates, becoming the sole dominant force.

So now, Haruto had little interest in this party.

"This invitation is from Lady Kaguya."

Ai Hayasaka stated.