I'll kill you after I finish this game!

The demon had already revealed a ferocious grin, for its blood, powerful enough to turn a person into a liquid, was almost touching Tanjiro's head, about to vaporize the human on the spot, but...

"Bah-"

Like squid grilling on a hot plate, it sizzled and emitted a pungent and foul-smelling fumes.

Under the demon's dazed gaze, a series of blue, transparent energy barriers, resembling hexagonal honeycombs, combined to block the demon's attack.

"Bam—!"

The demon's last glimpse of Tanjiro was as he indifferently turned away, and then his gaze sank completely into the darkness, leaving no trace.

Tanjiro has a small, prismatic crystal attached to his shoulder. This crystal acts as the source of his energy barrier, automatically switching to a low-frequency, invisible mode after a dangerous attack, thus concealing the energy's color.

Tanjiro, who used to be a charcoal seller and is now a demon-slaying swordsman, silently looked at the demon who had ambushed him earlier and whose upper body had now evaporated.

Then he looked down at the exquisitely crafted yet lightweight black pistol in his hand, and the blade imbued with holy power in his other hand, and sighed with a somewhat inexplicable tone:

"It feels like Brother Lei Zhe's weapon is much more practical than swords. Is this what Brother Lei Zhe meant when he said that the times have changed, making the demons feel it?"

With a gentle pull of the trigger, there was no recoil whatsoever. A small, silver bullet struck the demon directly, instantly vaporizing half of its body. It was incredibly useful.

He wasn't the only one who thought this way.

"Da da da da da da da da————!!"

Two modified black firearms, resembling Gatling guns emitting blue flames and spinning rapidly with their barrels, were held by Inosuke Hashibira, a man with a bare, muscular upper body and wearing a boar's head mask.

The fully automated and extremely heavy firearm was easily picked up by the pig, who pulled the trigger and continuously unleashed a baptism of holy bullets that tore apart the waves of evil spirits.

"Hahaha, this thing is way more interesting than the Nichirin Blade! Boar Charge! Nobody can stop me!!"

Secured to his body and wielding a heavy, powerful firearm in each hand, Inosuke Hashibira let out an excited laugh as he chased after the demons he used to fight so hard for so long, delivering a steely punishment!

Boom——

With a thunderous roar, Zenitsu Agatsuma, who had taken the sleeping pills given to him by Reiji, held a buzzing chainsaw sword engraved with sacred runes. With lightning speed, he tore through the demon horde, appearing utterly unstoppable.

Other Demon Slayer Corps members, some wielding holy swords or demonic swords, protected their teammates who were providing firepower, and began to systematically and swiftly eliminate the invading demons!

Seeing his companions' overwhelming advantage in eliminating the demons, Tanjiro felt that his own speed was much slower in comparison.

"Woooo..."

At that moment, his younger sister, Nezuko Kamado, came to his side with a bamboo stick in her mouth. She reached out to her older brother and handed him the extra Fire Kirin submachine gun, her beautiful eyes filled with eager anticipation as she looked at her brother.

Tanjiro looked at his sister's inviting gaze, glanced down at the sword and pistol in his hand, then slowly sheathed the pistol and the sword, before taking the submachine gun Nezuko handed him.

"This thing is definitely much better than the Nichirin Blade!"

With healthy smiles on their faces, Tanjiro and his sister ran freely under the sun, holding firing submachine guns, the bullets from the guns mercilessly slicing through every demon.

This harmonious and friendly scene between the brother and sister was projected onto the screen in the command center of the warship above, which caught Rei Zhe's eye and made him exclaim:

"This is nothing like Demon Slayer. But if I hadn't come to this world, it would probably be Pillar Slayer next."

"Muzan, Muzan, let me see what you can do now that you've changed! Increase your speed and keep the battle lines widening!"

"Yes......"

Inside the warship's command center, the two stunningly beautiful ship girls, Illustrious and Belfast, who were standing on either side of Reiji's seat, nodded and responded in soft yet steady voices.

The warship they were currently on was in the command center of Glorious's main warship. Glorious, dressed in a pure white, beautiful low-cut dress, maintained an elegant and beautiful smile throughout. After receiving Reiji's order, a series of data flashed in her beautiful blue eyes.

Meanwhile, the ship girls, led by Illustrious and Belfast, resonated with their sisters in the mental network, responding to Reiji's orders.

"Buzzing sound—"

In an instant, all the ship girls waiting on the air transport ship showed excited smiles, and all of them uniformly manifested their ship equipment.

"Little destroyers, you're responsible for stopping those evil spirits. Make sure none of them escape!"

Wearing a white Japanese-style military robe, with her long white hair fluttering slightly in the wind, Shoukaku, a Sakura Empire aircraft carrier girl, gently reminded the elementary school students behind her who looked like they came from kindergarten.

Shoukaku doesn't look like a soldier about to launch an attack; he looks more like a group of kindergarten teachers leading a group of female teachers.

"Yes~~~"

Wearing yellow hats typical of elementary school students, a group of small, innocent-looking destroyers responded adorably to the aircraft carrier's older sister.

“Swish, swish, swish, swish—”

After clearing out the flying demons and gaining air superiority, a large number of lava incendiary bombs were dropped from the small warships in the sky.

"Boom!!!"

Numerous small mushroom clouds rose slowly from the earth into the sky, turning the ground into a cratered, scorching surface.

Thousands of demons perished in the gunfire.

However, some tough-skinned demons still survived, and the armies that attacked them naturally wouldn't just launch one wave of attacks against such tenacious beings.

Immediately afterwards, the missile silos on the battleship, which was hovering at an altitude of 10,000 meters, opened, and Frost automatic missiles were launched into the air.

"Wow—"

Hundreds of white streaks swept across the neon-lit city sky and fell into the city's urban area.

"pound--!!!!"

In an instant, a cold air mass affecting hundreds of kilometers burst forth in the city, and the originally scorching hot environment rapidly dropped to freezing point in a second or two.

Such drastic environmental changes caused even the most resilient and powerful demons to turn into dust and dissipate the moment they were hit by the cold wave; their cells had been completely necrotic and destroyed.

A visible torrent of icy air lowered the temperature of the entire battlefield to freezing point, and in an instant, tens of thousands of evil spirits had died.

Having had their severed arms and legs healed by Raize, Uzui Tengen and Shinazugawa Sanemi, along with a group of Demon Slayer Corps members responsible for the cleanup, watched in trepidation as the steel torrents that easily shattered the earth and swept across the sky surged forth.

Societies that are still in a backward state view the power called technology with awe and incomprehension.

Is it because Japan is too backward that the war in Zhongzhou has already reached this level?

If they were facing an enemy of this kind, even with their lord's foresight, they would likely still be doomed.

With this level of combat power, even if the Demon Slayer Corps members were exceptionally strong, they would be instantly overwhelmed by the steel torrent.

Especially those pretty girls, Yuzui Tengen felt for the first time that he couldn't even beat the children among them.

These entities, when brought together, reveal the brutal nature of the battlefield meat grinder.

"Sanemi, do you still think this army of women is nothing special...?"

Watching the steel torrent sweeping away the demons in a carpet-like fashion, and the savage acts of those little girls shattering the earth with every move and tearing demons apart with their bare hands, Uzui Tengen's lips twitched as he said, "I feel like I can't even defeat a little girl. Their physical strength is even more terrifying than the demons!"

"Stop teasing me. I'll admit these women are powerful if they can eliminate evil spirits. Damn it! I must go to the Central Plains to learn from their masters sometime. I'm not even as strong as those young girls..."

Shinazugawa Sanemi glanced at the Storm Demon Blade in his hand, his expression and tone filled with resentment. He was convinced of the strength of Raize's female subordinates, and his resentment stemmed from the shame of being less powerful than the elementary school-aged ship girls in front of him.

"Let's go, let's go, but let's deal with the current matters first. I never thought that we Pillars would have to do the follow-up cleaning work. It's our turn!"

Looking at the battlefield ahead, where the bombardment had ceased, Uzui Tengen gestured to the Demon Slayer Corps members behind him and led the charge with his sword.

"Tsk, I hope there are still some surviving scum I can test my knife on!"

Sanemi Shinazugawa reacted immediately, activated his breathing technique and followed, a somewhat ferocious smile on his face, as he ran towards the battlefield where demons might still be alive.

On this first day, humanity launched a fierce and unstoppable attack on the evil spirits.

As the ship girls' steel torrent advanced at lightning speed, frequently launching attacks on the small island nation of Japan, Muzan, still intoxicated by his fantasy of becoming a god in the Infinite Castle, came to the attention of the enemy.

P.S.: Please vote and recommend! By the way, is writing unconventional stories taboo, like I mentioned before? I remember Hedgehog Cat had a discussion forum about it...

Chapter 71 Hell in the Demon Slayer World

"Damn it... who are these guys?!"

The dimly lit and astonishing Infinite Castle is filled with a Japanese-style room that exudes an eerie atmosphere.

In this dark and oppressive alternate dimension, countless gates of wind are interwoven and arranged, and figures of various shapes and sizes, exuding an evil aura, fill every place.

They were all evil spirits, with fierce or cunning expressions, or ferocious and terrifying appearances, or they didn't even have a human form.

They are all powerful demons lurking in the Infinity Castle, elites gathered by Muzan Kibutsuji on a large scale. Almost every demon here has the combat power to destroy a castle and the potential and talent to advance to the level of a Gen.

Now, a powerful force that Muzan hadn't expected has appeared in Japan. Sensing something was wrong, Muzan immediately summoned these elites.

In a Japanese-style room in the Infinite Castle, a gloomy woman with long, jet-black hair, wearing a slightly worn kimono, and fiddling with a biwa (a type of Chinese lute) in her hand, kept her head down, not daring to offend the gloomy-faced Muzan Kibutsuji.

"Nakime, have your 'eyeball clones' gathered any information about these guys?"

"I'm sorry... Lord Muzan..."

The pipa player, who had been hanging her head, also known as the demon Nakime, raised her head, revealing her eerie face beneath her jet-black hair, for on Nakime's fair, oval face was only one large eyeball.

Like a one-eyed ogre from a fantasy world, or a demon from a Japanese ghost story, her eerie and terrifying face instantly erased any beauty from her, leaving only horror.

Facing those eerie and enormous eyeballs, Muzan Kibutsuji, standing with a gloomy expression in front of a paper door, remained completely unconcerned.

This demon named Nakime is Muzan Kibutsuji's close attendant, residing within the Infinity Castle and serving to assist him.

The entire operation of the Infinite Castle is controlled by Nakime.

Of course, Muzan, whose strength has greatly increased, can also control this Infinity Castle space, as long as he has the desire to devour Nakime.

However, he didn't need to. He already possessed similar spatial abilities, so he naturally had no interest in controlling the changes in the Infinite City.

"Damn it, where did this guy come from that dares to go against me? The power of those women..."

Kibutsuji Muzan clenched his withered hand tightly. This time, he had changed into a gentlemanly outfit, but Muzan, dressed in a black suit, had an extremely gloomy face that could hardly be described as a gentleman.

The twin demons remaining on Upper Moon Six in Japan were eliminated immediately, and Muzan also obtained Gyutaro's memories through his own blood.

Therefore, Gyutaro personally experienced the sacred and destructive power that the sun, which had once subdued evil spirits, possessed in the instant before his death.

This gave Muzan, who had already become arrogant and complacent, a very bad feeling. That power was indeed effective against the demons he had created, and humans had already begun to launch a fierce counterattack using this power.

The demons Muzan created were not given the potential to surpass him; one truly perfect and ultimate being is enough.

Besides, he didn't want to make a mess of his backyard.

But now, he needs to break this rule; those women who came from who-knows-where must be eliminated!

"Nakime! Summon Kokushibo and Doma, who are on an expedition, and all the demons who have reached the String level!"

Muzan, his face grim and teeth clenched, gave the order.

These ominous signs must be completely eradicated; they absolutely cannot be allowed to continue to exist.