I'll kill you after I finish this game!

The sunlight shone on him, reflecting light as if it were on snow.

With a relaxed and carefree mood in his red eyes, Muzan Kibutsuji felt the warm sunlight through his skin, which no longer evoked any disgust. He couldn't suppress the sense of comfort and arrogance within him.

Ghost King casually picked up a steaming, incredibly fresh cup of wisteria flower tea from the small table beside him, squinted his eyes, took a few sips, savoring the bittersweet aroma in his mouth, and finally swallowed it all.

He also enjoyed the taste of food other than flesh and blood.

"Although I have long since overcome the sun, I can't help but feel an overwhelming joy when the first rays of sunlight shine on my perfect body in the morning."

A joyful smile spread across Muzan Kibutsuji's handsome yet eerie face as he opened his arms wide towards the sun in the sky, as if to embrace it.

"Soon I will become a god of this world, the ancestor of all living beings, the true ultimate being!"

With an arrogant gaze, he looked at the panel in front of him that only he could see. This treasure he had suddenly obtained, called the 'System', was the source of Muzan Kibutsuji's arrogance.

It displays various extraordinary data and powers of Muzan Kibutsuji.

This system, whose full name is Ultimate Life Evolution, is an extraterrestrial object that suddenly descended into Muzan Kibutsuji's body hundreds of years ago.

Muzan's easily agitated mind was very wary of this unknown object. At first, he thought that something strange had possessed him, and he tried desperately to remove it.

However, under the allure of the ultimate biological evolution system's rewards, his wary mind quickly succumbed.

Ultimate Life Evolution, as the name suggests, is a treasure used to cultivate a host into an ultimate life form.

After years of testing, Muzan discovered that this mysterious system would reward him with rewards that drove him crazy if he followed the special tasks it issued.

The initial task was to infect humans and turn them into ghosts, the more talented the better. After easily completing this task, the reward was a stone mask that looked like a vampire's hideous face.

This is the Stone Mask described by the system, a dark creature that can turn people into something similar to a ghost and cannot face the sunlight.

He cautiously tested the stone golem against the golems he had created, and it brought him quite a few surprises.

The demon who originally only obtained a small portion of his blood actually reached the level of a string after wearing this stone demon mask.

After further explanation from the system, Muzan also learned that the Stone Mask was created by a non-human creature, just like him, who could not see sunlight, with the purpose of defeating sunlight and becoming the ultimate life form.

Moreover, the Stone Mask he had at the time was not the complete version.

After a hundred years of letting down his guard and trying to complete those tasks, Muzan received many surprising rewards and then completely regarded the system as an extraordinary treasure.

The rewards he received for completing the mission also greatly enhanced his strength. Later, the Stone Mask with the complete Aja Red Stone allowed him to completely overcome sunlight, and all his previous weaknesses disappeared.

As Muzan continued to complete missions, he received a considerable amount of rewards, such as Blacklight Virus, T-Virus, G-Virus, and unique bloodlines or superpowers.

The system's missions are becoming increasingly aggressive and challenging, but the substantial rewards that come with them are also bringing more and more joy to Muzan.

His previous mission was to make him rule over all of Japan, and now he has indeed accomplished that, enslaving high-ranking Japanese politicians with his blood and spreading his blood wantonly.

He is now about to turn the entire neon-lit city into his ghost realm to achieve his goal.

With the system's guidance, Muzan seems to have become much braver, and he has now almost completely taken control of Japan.

At the time, all the power centers in Tokyo, whether they were the great nobles known as the Kazoku or the big capitalists and technocrats involved in the Meiji Restoration, willingly became Muzan's pawns.

There's no other reason than that Muzan, when he mustered up his courage, gave him far too much.

Power, wealth, status—temptations that even the most sagacious and enlightened emperors could not resist—that was the eternal path Muzan had laid out.

Tempted by this path, even nobles and powerful officials who usually appeared dignified instantly knelt down.

Muzan was able to take control of the entire Japan in a very short time, thanks in no small part to these two-faced traitors.

Some of the Upper Moons, one of his twelve demon moons, even went to America in Europe and began to infect humans.

The goal is to take control of the entire world. Nearly 80-90% of Japan has already fallen. Muzan recently received another system reward that made him happy.

[Genova Cytokines]

With this system introducing alien biological cytokines, Muzan's body underwent unimaginable changes once again, and he had long since transcended the low-level pleasure of cannibalism.

He eats whatever he wants; everything in the world is food to him.

Next, he will indiscriminately bare his fangs at the whole world until he turns the entire world into his backyard. This is the mission given to him by the system, and the reward for the mission has indeed made Muzan's heart burn with excitement.

[Final Mission: Conquer the world and turn all things into your 'offspring'!]

[Quest Reward: One attribute-less divine essence, and an interdimensional portal.]

After carefully reading the detailed description of the mission rewards, Muzan was quite motivated.

So, without a doubt, Muzan could become a god, and the otherworldly portal would allow him to reach a new world.

As his strength grew, Muzan's ambition also swelled.

Since there are other worlds, once he has completely conquered this world, he will go to a brand new place to show his skills!

With the possession of the System Treasure, Muzan's arrogance and conceit grew increasingly uncontrollable.

But suddenly!

"Swish swish swish swish..."

Five figures appeared out of thin air behind Muzan Kibutsuji, kneeling on one knee and bowing their heads.

"My lord, the Okinawa, Shikoku, Osaka, and Hokkaido regions have been completely assimilated!"

"Ah."

Kibutsuji Muzan sipped his tea, and after hearing his subordinate's report, he slowly put down his teacup. Then, he raised an eyebrow slightly, as if he had remembered something interesting, and spoke.

"By the way, are those guys still not willing to surrender?"

Muzan refers to the Demon Slayer Corps, their former mortal enemy and now a pack of wolves.

Now, almost the entire country of Japan has fallen, and the remaining humans have either become demons or food for them.

Although most humans will become food for ghosts now, some ghosts still crave flesh and blood and will definitely devour humans if they find them.

One of the tall male demons, with bluish-gray skin and an incredibly muscular physique, answered Muzan without raising his head: "My lord, those prey are still fleeing and fighting against the demons. Should I lead the demons to eliminate those troublesome fellows for you?"

I really don't understand why those humans who are meant to be food wouldn't turn into ghosts. They must be so happy to be like this now. They wouldn't have to suffer so much as ghosts, and they wouldn't be treated as food anymore.

"Ha, is it necessary to make a big fuss over some ants who can't even stop a chariot? Just continue doing what you're supposed to do."

Muzan Kibutsuji chuckled lightly, his words showing no concern for the remaining Demon Slayer Corps members. He figured they would die sooner or later, or end up in the bellies of other demons, regardless of whether they surrendered. He said with a chuckle, "Kuroshibo and the others have already gone to another country. You all need to get everything settled in this country as soon as possible. Then I will send another group of demons to Asia!"

The five powerful demons solemnly assured each other that if they could go to other regions and conquer them, it would surely please Lord Muzan, and they would also benefit from it.

..........

Meanwhile, Razer, who had just arrived in this place and spent his first night there, followed the people of this world to the vicinity of a misty mountain.

Meanwhile, Raizetsu also thoroughly understood the anomalies that had occurred in this world through the help of the Flame Pillar, Rengoku Kyojuro and the others.

This also confirmed that the twist in this world lies with Muzan Kibutsuji. If it weren't with that scoundrel, given Raize's understanding of Muzan Kibutsuji's personality, he would never have been able to stand in the open.

According to Kyojuro Rengoku, Japan has entered a state of near-collapse.

Yes, the human kingdom will cease to exist, and this country will become a paradise for evil spirits.

Meanwhile, Rengoku Kyojuro and Tanjiro lowered their guard somewhat after confirming Reiji's human and foreign identities.

Because of Reiji and his companions' amazing power against demons, Rengoku Kyojuro, as the Flame Pillar, extended an invitation to them.

They are now approaching the Demon Slayer Corps' temporary base.

[That Muzan Kibutsuji, no, the thing behind him, is probably going to turn the entire world into fuel. We should just find him and kill him.]

"What is this so-called fuel?"

Reiji asked Nep this question, but in fact he already had a vague answer in his heart.

I once used the game wishes you collected for me, as well as some souls, to heal myself. That thing wanted to turn the entire world into absorbable matter.

I understand, I completely understand. Regardless of the purpose, understanding the other party's behavior is enough to get him to take action.

Anyway, even if he hadn't encountered this kind of catastrophe in this world, he would have easily dealt with these disgusting ghosts and their scumbag boss.

"Om-"

Raise his hand casually, and Razer aimed his palm at the horde of evil spirits that charged at him like zombies in broad daylight. The holy light spread out in ring-shaped ripples, and all the evil spirits that were swept away were instantly reduced to ashes and vanished.

Kyojuro Rengoku and Tanjiro Kamado, who were standing beside him, were incredibly excited to see this. The power of this special person from the mainland was indeed as effective at eliminating demons as the sunlight had been in the past.

"Mr. Rai Zhe, you are an Onmyoji, no, I remember you were called a Taoist or a sorcerer over there. Did you come to Japan to exorcise these evil spirits?"

Tanjiro Kamado was incredibly excited to see this scene. The demons were being annihilated so easily and effortlessly, without any apparent exertion. People from the Central Plains on the mainland were truly amazing.

"Ah, this light feels so good~~~"

Hashibira Inosuke and Watsuki Zenitsu didn't feel any discomfort when they were caught in the peripheral vision of Raize Seiki. On the contrary, all the hidden injuries they had sustained while using breathing techniques to draw strength from their bodies and fighting were healed on their own.

That relaxed and comfortable feeling made both of them feel at ease without even realizing it.

"Ah, after all, these demons have set their sights on other places after taking over Japan. It can be said that this is no longer just a disaster for Japan. If these evil demons are allowed to run rampant, the whole world will probably suffer as well."

In response to Tanjiro Kamado's somewhat excited question, Reiji replied with a gentle smile.

His goal is now clear: to eliminate these evil spirits and Muzan Kibutsuji. He has no interest in the apocalypse or anything similar to Earth.

"I am very sorry, but these monsters were born in our country and are now threatening the whole world."

Rengoku Kyojuro lowered his eyes slightly and sincerely apologized to Reiji. He knew that the demons had turned their attention to other countries, but they were powerless to stop them as they were struggling to protect themselves.

After all, these evil spirits originated and spread from their country; they have the obligation and responsibility to eradicate them, but now...

"..."

Tanjiro clenched his fists involuntarily upon hearing this. The thought of so many others suffering the same fate of losing their families and homes because of demons filled him with anguish.

Lei Zhe's excitement inexplicably turned into shame.

Perhaps the ghost has already gone to Mr. Reiji's hometown, where it harmed others, which is why Mr. Reiji came here...

The kind, resolute, and gentle boy imagined it this way.

Reiji, who could read minds, shook his head helplessly at Tanjiro's wild imagination.

This boy is really hard to dislike. His gentleness isn't weakness or being a saint. Anyway, Lei Zhe likes and appreciates this boy very much.

"Don't blame yourself. Your resistance against these ghosts beyond your limits deserves my respect. The situation will not get worse because of my arrival."

With a light laugh, Reiji reached out and began to treat the injuries that Tanjiro and Kyojuro Rengoku had accumulated from their long battle.

Tanjiro looked down at his body with a dazed and incredulous expression. All the injuries, big and small, on his body had healed, and he felt much easier to breathe.

And... Mr. Razer's power is so heartwarming...