I transmigrated at the same time and became the King!

Chapter 216 A bunch of exploding stars, coming to a world of exploding streets... are they frying fish?!

One-Punch Man World.

House of Evolution.

After a month of in-depth research, Genus has now achieved perfect results in his study of humans turning into demons.

He discovered the secret of the demonization, found the core reason, and used his technological means to restore the demonized Nezuko back to human form.

Having regained her human form, Nezuko also awakened her memories of her human days, and that gentle nature made her regard Genus as her second parents.

After all, without Genus's help, she probably would never be able to recover from her demonic state and return to human form.

Besides using the serum on Nezuko to turn demons back into humans, he also developed an enhancer that allows humans to enter a demon-like state.

This demonic state is different from the demonic state that is entered through infection with Muzan's blood. It does not require drinking blood. The form is maintained entirely by one's own physical strength. When the physical strength is exhausted, the body will degenerate from the demonic form. It can be said to be a temporary enhanced form.

The demonization potion and the recovery serum—these are the perfect results Genos has achieved in the past month.

"Uncle Genus, hasn't Uncle King arrived yet?" Midouzi blinked, looking on with a blank expression as she asked Genus.

Road.

She still remembered what Genus had told her: if she stayed here for a month, she could return to her original world and then she could see her brother, Tanjiro.

"The appointed time has arrived. Mr. King should be arriving in a few more hours. Don't worry about the little one. You'll see your brother again soon. I'm sure he'll be very happy to see you back to normal." Genus stroked Midouzi's forehead affectionately, speaking gently.

During the month they spent together, he did not treat Mizuko as his experimental subject. Instead, because of Mizuko's purity and kindness, Genus felt a long-lost sense of family affection. He subconsciously raised Mizuko as his daughter at the House of Evolution for a month.

Not only does he check on Nezuko's body every day, but he is also afraid that she may have developed some kind of illness after she is freed from her demon form. He pays close attention to her health every day, and everything she eats and drinks is carefully selected by Genos.

"Mmm." Midouzi nodded repeatedly, her face beaming with an angelic smile that was incredibly soothing.

"Buzz~~!!" Just as the two were talking, a dimensional portal materialized in front of them.

The sudden appearance of the enormous vortex startled Nene, who instinctively hid behind Genus, peeking out half of her head to observe the massive vortex.

"Don't be afraid, Mr. King is here," Genus said to Mizuko.

Once the dimensional portal is complete, Ze Feng and Son Gohan return from the Dragon Ball world.

Ze Feng, who had just arrived, immediately noticed Ni Douzi hiding behind Genus.

Upon seeing a familiar face, Midouzi walked up with a smile and greeted them.

"This little guy is in pretty good spirits. It seems your research has been very successful." Ze Feng noticed that Mi Douzi was no longer in his previous demon form, but a real human.

"The principle of demonization in that world is similar to that of monsterization, but it is not as good as monsterization. At most, it is just cell mutation. As long as the core element is found, it is easy to develop a serum. By the way, Mr. King, in addition to developing a serum that can restore demons to humans, I have also made a brand new discovery: an enhancement drug that can temporarily put humans into a demonized state."

"The duration of this medicine depends on the user's physical strength. The stronger the user, the longer the demon transformation can be maintained. When the physical strength is exhausted, the user will revert to human form."

"Should we bring it along?"

Genos respectfully inquired about Ze Feng's intentions.

Only if the strongest hero on Earth agrees can he proceed with his experiment.

The consequences of violating KING's principles are unimaginable.

"A power-up potion that can temporarily put someone into demon mode? That's interesting. Let's take it with us, just in case we need it." Ze Feng agreed to Genus's request and then opened a dimensional portal directly to the Demon Slayer world.

"Armored Gorilla, go and get the demonization potion I prepared beforehand," Genus instructed the armored gorilla.

The contents inside were a few ghost-transformation potions he had prepared in advance; there were only a dozen or so.

After receiving the demon-transformation potion, Genus immediately set off with Ze Feng and Son Gohan into the dimensional portal.

The world of Demon Slayer.

Demon Slayer Corps Headquarters.

At Kagaya Ubuyashiki's call, the nine Pillar-level swordsmen and the three main characters have gathered together.

After a month of grueling, hellish training, the Demon Slayer Corps' high-level combat power has seen an explosive increase.

The T30 enhancement potion worked perfectly, and was absorbed into the bodies of every member present. In addition, because they had awakened their markings, the side effects were also offset by the enhancement effect of the T30 potion, and the markings became permanent. Having perfectly absorbed the enhancement effect of T30, their combat power generally reached the Demon level. There was one special guy who, due to his outstanding physique, was directly enhanced to the Dragon level!

Even the weakest Shinobu Kocho has a combat strength of around the mid-level of a demon.

The Pillar-level swordsmen whose combat power reaches the level of a high-ranking demon are: Kyojuro Rengoku, Obanai Iguro, Mitsuri Kanroji, and Tengen Uzui.

The Pillar-level swordsmen whose combat power is at the peak of the Demon level are: Giyu Tomioka, Muichiro Tokito, and Minamoto Shinazugawa.

The Pillar-level swordsman whose combat strength is below that of a Dragon is: Gyomei Himejima, the Stone Pillar.

The T30 enhancement potion not only elevated their own strength but also repaired all their flaws.

For example, Kyojuro Rengoku's eardrum, which had been damaged for many years, was repaired, and Obanai Iguro's lip nick was also repaired.

All the hideous sword wounds on Shinazugawa Sane's body disappeared.

The sight of Kyōmei Himejima has returned.

Besides these pillar-level swordsmen, the three main characters also underwent a qualitative change.

Tanjiro Kamado also drank the T30 enhancement potion, unlocked his Demon Mark, and was promoted to Demon-level strength. He mastered the Breath of the Sun and was exceptionally promoted to the Sun Pillar by Kagaya Ubuyashiki.

Hashibira Inosuke was also given the T30 enhancement potion, unlocked his mark, and his strength was promoted to the Demon level. He mastered the Breath of the Beast and was exceptionally promoted to the Beast Pillar by Ubuyashiki Kagaya.

Zenitsu Agatsuma also received the T30 enhancement potion, and his mark activated as usual. Relying on his Thunder Breathing, he could normally...

His combat power in his normal state is roughly equivalent to that of a demon, but when he falls asleep, his combat power can soar to around the level of a mid-level demon. He was exceptionally promoted to the Rank 15 by Kagaya Ubuyashiki.

At this moment, the Demon Slayer Corps has reached its peak, boasting twelve Pillar-level swordsmen. Its sheer size and terrifying overall strength far surpass what the first generation of Demon Slayer Corps members from the Warring States period could ever achieve.

"Is everyone here? Everyone, today we will finally settle things with Muzan Kibutsuji, end the era of demons, and ensure that people will never be persecuted by demons again. The future belongs to us." Kagaya Ubuyashiki was wearing a kendo uniform with a special Nichirin Blade hanging at his waist. He had asked the village chief of the sword-forging village to specially forge it. Its sharpness was such that even a slashing wave from a distance was enough to decapitate some powerful demons.

With the help of the supernatural powers that Ze Feng gave him, coupled with the sharing of Madara Uchiha's physique, his strength underwent a tremendous change.

Through simulating the sun and moon, his supernatural powers allowed him to perfectly comprehend the two extremely powerful breathing techniques: Sun Breathing and Moon Breathing.

Madara Uchiha's physique allowed his body to undergo a complete transformation during a month of intensive training. It's no exaggeration to say that his current strength is barely considered to be at the Dragon level in the world of One-Punch Man.

While it may not be as exaggerated as reaching the level of a mid-dragon or upper-dragon, it is at least a human version of a dragon-level being, similar to a water dragon.

I'd say he's a Dragon-level goalkeeper.

"Finally, this moment has arrived. Namo Amitabha." Himejima Gyomei clasped his hands together, his eyes burning with intense flames. Since regaining his sight, his pupils had reappeared; eradicating evil spirits was his lifelong pursuit, a goal he had pursued to perfect...

He would give anything to achieve this goal, even his own life.

"After a month of brutal training, I'm back from hell!! This time I'm going to kill them all without leaving a single one alive!!" Shinazugawa Mina could no longer contain his rage. He was a near-mad avenger with an almost pathological obsession with demons, and he had to kill them to temporarily relieve the hatred in his heart.

"I've waited for so long—too long—" Giyu Tomioka was lost in his memories. His fate had been changed because of demons. His family, his most respected senior brother and sister, had all died because of demons.

This time, as long as Muzan Kibutsuji's head is severed, this era will come to an end, and they can finally retire.

"Sister, we'll be able to meet again soon." Shinobu Kocho's mind conjured up the image of her older sister, Kanae Kocho. After two years apart, they finally had the chance to see each other again.

She always remembered the promise she made with Madara Uchiha.

If she can kill one of the top three Upper Moon demons, the other party promises to help her revive Kanae Kocho.

The other Pillar-level swordsmen had different thoughts, but they all looked forward to the final battle.

Once Muzan Kibutsuji is defeated, the era of demons will come to a complete end, and the demon slayers will have no reason to exist. Everything will return to peace.

"It seems the children's morale is very high." Kagaya Ubuyashiki was very satisfied with everyone's performance.

This is a game you can win, unless something unexpected happens.

No! Even if something unexpected happens, they will definitely win. Not to mention that they have Uchiha Madara by their side, the strongest on earth, KING, is also quietly watching this place, and we don't know when he will arrive.

That guy is a true god-level fighter; as long as he takes action, there is no disaster in this world that he cannot handle.

"Judging by the time, we're almost there," Madara Uchiha reminded him.

[Ding! The strongest man on Earth has used dimensional travel, target world: Demon Slayer.]

The moment he finished speaking, the mechanical notification sound of the Dimensional Mutual Aid Group rang in Kagaya Ubuyashiki's mind.

"Buzz~!!!"

In the center of the courtyard, a dimensional portal appeared out of thin air, and powerful figures, led by Ze Feng, emerged one after another from it.

Ze Feng, Son Gohan, Genus, and Kamado Mizuko.

[Holy crap!! He's here too?!] Kagaya Ubuyashiki's heart trembled violently the moment he saw Son Gohan.

How could anyone not recognize him? It's Son Gohan, the strongest single warrior from the Dragon Ball world!!

Top-tier fighters from three major shonen anime—Naruto, One-Punch Man, and Dragon Ball—gather in his Demon Slayer world.

You scoundrel!!

[How worried are they about things going wrong? Having me here isn't enough, so they even brought Son Gohan along?] The moment Madara Uchiha saw Son Gohan, his eyelids twitched wildly, and the corners of his mouth twitched uncontrollably.

No one dared to underestimate this newcomer who had just joined the dimensional mutual aid group.

The power levels in the Dragon Ball world are well-known and far surpass those in the One-Punch Man world.

Is it really necessary to deploy such a powerful lineup to fight Muzan, whose combat power is at most comparable to a Demon-level monster?

"Nezuko!!" Tanjiro immediately locked onto his younger sister Nezuko, completely losing control of his emotions, and quickly stepped forward to check on Nezuko's physical condition.

Even he himself was stunned when he saw it.

The Nezuko in front of me has completely returned to her human height, and all the characteristics left by her demon transformation have disappeared.

"Brother, it's been a long time." Nezuko greeted Tanjiro with a faint smile.

"You—you've recovered?! That's wonderful—Uncle Genus succeeded." Tanjiro had been living in fear for the past month, worrying every day that something might happen to Nezuko, or that Genus's research might fail and cause Nezuko to die.

But after seeing that Midouzi was safe and sound, he finally felt relieved.

"Kid, are you questioning my technological prowess?" Genus, standing nearby, darkened his face and questioned Tanjiro with obvious displeasure.

"Uh—how could such a thing be? Uncle Genus, you must have misheard me." Tanjiro was embarrassed and could only make up an excuse.

"Is this the world of Demon Slayer? The air quality is good. I haven't seen a complete building in a long time." Gohan took a deep breath and exhaled after arriving, relaxing his tense nerves.

In his future timeline, Earth was almost completely destroyed. For many years, no intact buildings had been seen, and the air quality was perpetually filled with the stench of gunpowder and corpses.

Arriving in the world of Demon Slayer now gives Gohan a somewhat surreal feeling.

"Everyone's here. It seems your training has been quite effective. Well then, it's time to put an end to this world for you." Ze Feng turned his gaze to Ubuyashiki Kagaya, indicating that he could begin his operation now.