Let's Get It Started

Even so, Muzan wasn't skilled at educating a wayward child, and the key thing was that this guy didn't have much emotion...

Forget it, let's just let things with Douma take their course.

Then...

Two years later, as soon as Muzan arrived at Infinity Castle, he saw Douma grinning and approaching Akaza, who had a dark expression and looked like he wanted to punch Douma's head off.

Chiyo watched awkwardly. After all, Chiyo was the one who found Douma, and in fact, when they were learning to read back then, Chiyo had already recognized Akaza as his older brother.

"Lord Akaza, you're so cold~"

"Ah! Lord Muzan has arrived!"

Douma looked cheerfully in the direction where Muzan appeared.

In the original story, Muzan didn't like Douma much, and he still didn't like Douma now.

This guy had a fake smile plastered on his face.

"Lord Muzan~ It's finally been two years since I last saw you!"

Although Douma said that, Muzan could see his inner thoughts, and he was extremely disrespectful towards him.

He didn't understand Muzan's demands and even thought Muzan's actions were foolish. Why couldn't he eat people freely?

Humans were fragile and foolish; eating them was a way to free them from suffering!

Moreover, he had always thought Chiyo was childish.

And in Akaza's eyes, the act of not eating women was even more incomprehensible.

At this moment, Akaza also noticed Muzan's displeased expression and glared at Douma with a dark face. "Shut up!"

Douma immediately put on a wronged expression, though he didn't actually feel anything inside.

Besides Muzan, Douma, Chiyo, and Akaza, Tamayo and Yanagisawa Noriyuki had also come to Infinity Castle.

Compared to their antics, Tamayo and Yanagisawa Noriyuki were much more composed, watching them mess around from the side.

As for the reason they had gathered at Infinity Castle this time, it was because of Tamayo.

Since technological development was almost nonexistent, Tamayo's mission was naturally impossible to complete. She wasn't foolish either, so she discussed it with Yanagisawa Noriyuki.

The two hit it off immediately—let's develop technology!

Thanks to the influence of their boss, they already had some understanding of this field, which led them to this idea.

But everything required an economic foundation.

Thus, the two came up with a plan: through their research, they would create products and thereby generate economic value.

But this all required manpower.

When Muzan learned of this, he was surprised by their broad thinking and, out of curiosity, readily agreed.

Chiyo and Douma, who happened to be idle, were called over. As for Akaza, honestly, Muzan wasn't at ease leaving Chiyo and the others alone. He decided to have Akaza as a backup. After two years of influence, Akaza still didn't understand much, but he grasped some of it.

Speaking of which, Douma was indeed a genius, whether in combat or other aspects. He learned to read and write in just a few months, which made Chiyo extremely happy.

In short, Ryūsei Pharmaceuticals was established.

Muzan's original intention was simply that he found it interesting and wanted to play around.

Moreover, was the name "Ryūsei Pharmaceuticals" too ahead of its time?

But what he never expected was that five years later, Ryūsei Pharmaceuticals would become increasingly renowned, becoming one of the top pharmaceutical companies in the entire country...

Under Tamayo's instruction, Douma's Eternal Paradise Cult, despite his young age, was set aside. The original followers either became employees or left the cult.

As for the current situation, it seemed natural.

Among the hundreds of demons, although they couldn't be said to be of one mind, they were united in their efforts and followed Muzan's orders.

On the official side, there were Maruoka Gōnin, Maruoka Kinuko, and Asanuma Seiji. Coupled with the existing support for commerce and technology, Tamayo and the others had accumulated knowledge over a long period that ordinary people lacked, along with Muzan's support.

The current situation was a reasonable outcome.

And so, this scene unfolded.

A man in a formal suit pushed open the conference room door.

Inside the conference room, Douma, also in a formal suit, sat in the main seat with a fake smile on his face, while Akaza sat to the side, impatiently tapping his leg.

Seeing the door open, Douma stood up with a grin, displaying a business-like smile:

"Hello."

The visitor was a member of the Ubuyashiki Family—Ubuyashiki Ten'ei, who had come on behalf of the Demon Slayer Corps to negotiate the price for a large-scale procurement of Ryūsei pharmaceutical ingredients.

"Hello."

Admittedly, Douma was quite capable. Under Tamayo's deliberate guidance and the influence of Muzan's blood on the demons' personalities, although his demeanor was still annoying, his worldview gradually became more normalized.

And within Ryūsei Pharmaceuticals, through years of learning, he gradually took on significant responsibilities, becoming one of the leaders of Ryūsei Pharmaceuticals.

However, some of his thoughts remained unchanged. For example, he still believed that all humans were foolish and laughable. He also yearned for emotions and felt a sense of disdain for almost everyone except himself.

Muzan's expression grew strange when he learned Douma was discussing drug prices with someone from the Demon Slayer Corps.

So the Demon Slayer Corps came to an Upper Rank to buy medicine?

Interesting!

No, he had to see this for himself!

Muzan excitedly ran to the corridor outside the meeting room. Accompanying him in his enjoyment of the spectacle was Chiyo.

As Douma smiled and saw the Demon Slayer Corps members out of the meeting room, Ubuyashiki Ten'ei walked past Muzan and Chiyo, glancing at them.

Muzan smiled in response.

"You have a good atmosphere here. We can cooperate long-term…"

Ubuyashiki Ten'ei and Douma conversed as their figures receded down the corridor. This internal environment of the so-called Ryūsei Pharmaceuticals left him with a very good impression.

Muzan and Chiyo exchanged glances, wanting to laugh.

Akaza was still inside, unhappily tapping his leg. He suddenly caught sight of Muzan and excitedly stood up. "Lord Muzan!"

He practically bolted out of the meeting room, his face a mask of suffering as he pleaded, "Lord Muzan! Let me do something else! That Douma guy is just too annoying!"

Ah, this…

Muzan could understand Akaza's feelings.

After all, he had seen Akaza's experiences in his memories.

Even if the current Douma wasn't Akaza's match and his worldview wasn't as twisted, the problem was, he was still annoying.

Every day, he'd put on a fake smile, and as soon as he saw Akaza, he'd swoop in, "Akaza-dono~ I missed you so much."

And Akaza wasn't very good at understanding certain things, so Douma would always butt in, "Akaza-dono, you can't do it, let me~"

"Akaza-dono, you definitely won't be able to learn it."

Unabashed mockery!

With a fake smile, he acted like they were close friends, but his eyes were full of disdain!

Things like this were incredibly infuriating.

He now wanted to go back to Maruoka Gōnin's side and kill some troublesome individuals for him!

To vent!

Muzan mused that it did seem appropriate to have Akaza change locations. With Tamayo watching Douma, he probably wouldn't do anything too outrageous.

"Lord Muzan, I missed you so much~"

Around the corner of the corridor, Douma walked over with a wide smile. In his hand, he held a female corpse missing an arm, bloodstains around his mouth and on his arm. He walked over and tore off an arm.

"Lord Muzan, would you like to try? A girl's body is very nutritious."

Muzan's expression soured. "Can't you be more mindful when you eat?"

There were more than just demons in Ryūsei Pharmaceuticals!

Douma pouted aggrievedly and looked at Akaza.

"Akaza-dono, do you want some?"

Akaza shot him a dark glare.

He knew perfectly well that Akaza didn't eat women!

Muzan didn't actually mind Douma eating people casually. It was just that Douma, as a demon, still didn't want to die. Coupled with a slight change in his thinking, he was actually following the rules.

The corpse in his hand was just a piece of scum he'd killed incidentally. However, his male accomplice had already been devoured in a few bites.

After all, his diet had shrunk somewhat, and being picky was a luxury. He could only save the girls he liked for later enjoyment.

Douma openly eating as he walked made Muzan somewhat unhappy.

Eat however you want when you're alone. Eating here like this can easily cause trouble for Tamayo and the others.

Douma wasn't completely ignoring Muzan's words. He quickly finished eating in a few bites and pulled out a handkerchief to wipe his mouth.

"Lord Muzan, please don't worry. All the humans have gone back to rest. Only we demons are left."

"Akaza-dono!"

As soon as he finished speaking, an anxious shout was heard.

The four demons present all looked over.

Douma smiled.