People in Demon Slayer: The Journey That Began with Demon Slayer

Based on this, the Ubuyashiki clan formed a demon-slaying organization, hoping to kill Kibuy Muzan and Yosuke.

However, the Demon Slayer Corps did not find Muzan Kibutsuji and Yosuke Kibutsuji, who were the instigators of all the chaos. Instead, a large number of demons created by Muzan Kibutsuji ravaged the human world. Even the demon slayers who did not know the Breathing Technique suffered heavy casualties despite having Nichirin Blades that could kill demons.

Many years later, a legend circulated among the people about a wandering samurai who could slay demons and fought against them.

Inside a guesthouse in Kyoto, Yosuke gazed out the window at the brightly lit streets, which were even more bustling than during the day, despite it being nighttime.

Countless years have passed, and Yosuke has become accustomed to the habit of being active at night and hiding during the day. Through continuous demon slaying and training, his strength has greatly increased.

Host: Yosuke Ubuyashiki.

Constitution: Origin of the Demon.

Abilities: Super-fast self-healing, three minds and two brains, blood endowment, blood poison, swordsmanship, form transformation? Blood wings (not belonging to Blood Demon Art, but a self-extending ability).

Blood Demon Arts: Blood Demon Arts - Shadow Wolf, Blood Demon Arts - Concealed Eyes, Blood Demon Arts - Blood Domain.

Since the system's rewards were all related to demons, no sword techniques related to breathing techniques were drawn.

Yosuke happened to have a Nichirin Blade in his hand. At that time, Yosuke followed the aura of the demon and tracked it. When he arrived, there were dozens of demon-slaying swordsmen lying nearby, and the demon was gnawing on their corpses.

Yosuke easily killed the demon and found a perfectly intact Nichirin Blade on the ground. Curious, he touched it, and just touching the blade made his skin feel a burning sensation. However, at this point, the Nichirin Blade could hardly cause Yosuke any damage, so this Nichirin Blade became Yosuke's weapon.

Yosuke inquired about the system's breathing techniques, but the system explained, "Because the original breathing techniques have not yet been created, this option is not available in the system's prize pool."

Yosuke sighed, "It seems we'll have to wait until Yoriichi Tsugikuni creates the Breath of the Sun before we can obtain it..."

Suddenly, Yosuke smelled an extremely strong demonic aura.

Unlike the aura of ordinary demons, this aura was very familiar, just like... Yosuke's own demonic aura.

Kibu Muzan... is nearby!

Chapter 8 Pearl World

Yosuke followed the scent of Muzan Kibutsuji to a clinic, where he could smell a strong stench of blood even before he entered.

Upon opening the door, the clinic was a mess, with blood everywhere.

In the very center, a woman who had turned into a ghost was embracing two corpses and wailing.

"Why...why did you deceive me! I just want to live and watch my children grow up! My children...my husband..."

This was the first time in nearly two hundred years that Yosuke had seen a demon that still possessed its own reason. Driven by curiosity, Yosuke did not immediately take action.

The woman noticed Yosuke and sensed his demonic aura. She glared at him angrily and said, "It's all your fault! You evil spirits deceived me!"

The woman swung her fist and punched Yosuke.

How could a newly born demon possibly be a match for Yosuke? The woman's fist struck Yosuke's shoulder, but it didn't hurt at all.

Yosuke grabbed the woman's arm and asked, "How long has Kibuy Muzan been gone?"

The woman was filled with hatred: "That guy who deceived me, his name is Ghost Dance..."

The woman stopped abruptly, her strong intuition telling her that if she uttered that name, she would surely die!

The woman glared at Yosuke with resentment: "Why? Why am I afraid to say this name?"

"The one who turned you into a demon is called Muzan Kibutsuji. When he turned you into a demon, he placed a curse on you. Any demon who leaks information about him will be corrupted and die by the curse."

"Then why are you alright?!" the woman questioned Yang Jie.

"Because I am not a demon he transformed. Like Muzan Kibutsuji, I am a demon of origin in this world."

The woman stared blankly at Yosuke's face. The next second, she pulled a knife from the fruit plate on the table and stabbed Yosuke in the neck.

However, an ordinary blade would break instantly if it touched Yosuke's skin, as it would if it touched steel.

The distraught woman collapsed to her knees, crying out, "Why can't you be killed?! You evil spirits! Why can't you be killed?!"

"There's no need to be so hostile towards me. If you want to kill Kibu Muzan, then we have the same goal. What's your name?"

The distraught woman revealed her name.

"Tamayo".

Yosuke was momentarily stunned upon hearing the name, memories surfacing in his mind: Tamayo? The one who developed the drug that could turn demons back into humans?

This Tamayo even played an irreplaceable role in the final battle against Muzan Kibutsuji in the future, truly deserving the title of the best support.

Yosuke crouched down, looking directly into Tamayo's despairing eyes:

"I can remove the curse that Kibu Muzan placed in your blood, but the price is that you must help me develop a drug to counter Kibu Muzan. How about it? Rather than a price, this should be seen as an opportunity for you, right?"

Although her mind was filled with hatred, Tamayo, who had already been deceived by Muzan Kibutsuji once, was now very cautious: "Since you are also a demon, why did you kill that man?"

"Although I share the same bloodline as Kibu Muzan, I am different from him. I have always believed that I am a human being. My family has been cursed because of Kibu Muzan and me, and my responsibility is to cut off this sin."

Even though Yosuke spoke sincerely, Tamayo remained wary of him.

"Tamayo, you have no other choice now. You can only cooperate with me. Kibuy Muzan is currently looking for a way to overcome sunlight. You are skilled in medicine, and sooner or later he will find you, and you will be powerless to resist."

Tamayo's expression changed, and she said reluctantly, "I agree..."

Yosuke nodded with great satisfaction. He knew that Tamayo did not trust him yet, but Yosuke believed that in the days to come, as Tamayo got to know him, she would cooperate with him sincerely.

Yosuke cut open his palm and dripped his blood into Tamayo's mouth.

As Yosuke's demon king blood entered her body, Tamayo felt as if her body was about to melt, and the extreme pain made her struggle incessantly.

However, driven by her obsession to kill Muzan Kibutsuji, Tamayo remained silent and endured the pain caused by Yosuke's blood.

The amount of blood that Kibuy Muzan injected into Tamayo's body was not much. With Yosuke injecting a large amount of blood, he manipulated the flow of Kibuy Muzan's blood to force it out.

Time passed second by second, and Tamayo felt as if her body had been freed from shackles, feeling incredibly relaxed.

Having accomplished all this, Yosuke extended his right hand to Tamayo and helped her up: "My name is Ubuyashiki Yosuke. Welcome to my company, Tamayo."

Yosuke left the clinic, and Tamayo still needed to bury her child and husband.

When Yosuke saw Tamayo again, she no longer felt the grief of losing her loved ones, but only hatred for Muzan.

In order to help Tamayo study Muzan Kibutsugu, Yosuke hunted down a large number of demons and gave Muzan Kibutsugu's blood to Tamayo for research. Yosuke even extracted his own blood for Tamayo's research, but the progress was minimal.

Tamayo, who had been with Yosuke for decades, also let down her guard against him. As the younger brother of Muzan Kibutsuji and another demon king in the world, Yosuke had never eaten anyone and even took it upon himself to hunt demons.

Tamayo acknowledges Yosuke as her comrade.

——

After hunting down demons in Okazaki, Yosuke returned to a rural clinic and pushed open the door.

Inside sat a woman with long black hair parted in the middle and styled into a large, low bun, secured with a flower hairpin. Her eyes were gentle, like a pale pink mist, and her lips were red, contrasting sharply with her pale complexion. She wore a dark purple kimono decorated with wavy pale purple branches and red flowers, and a wide beige sash around her waist. She was sitting upright in a chair, fiddling with herbs.

"Tamayo, how's the research going?" Yosuke shouted as soon as he entered the room.

Over the decades, the familiar humans around them died with the passage of time, leaving only the immortal Yosuke and Tamayo to keep each other company.

Tamayo was used to Yosuke's nagging: "It's still the same as always, there's no progress at all."

Yosuke handed the blood he had just extracted from the demon to Tamayo, saying, "Try this. There's quite a bit of Muzan Kibutsuji's blood in the demon we just killed."

After examining it, Tamayo shook her head: "It's still not enough. Although this demon has a lot of Muzan's blood, the concentration is too low."

Yang Jie scratched his head and said, "How about we draw some more of my blood?"

"Drawing more blood won't help. You and Kibu Muzan are brothers. Although your genes are similar, the Demon King's genes are completely different. To put it simply, it's like the difference between a carnivore and a herbivore. The medicine made from your blood can only work on you."

Upon hearing Tamayo's explanation, Yosuke felt a headache coming on; he knew absolutely nothing about medicine.

Chapter 9: The Beginning of the Battle Against Kibu Muzan

Just when Yosuke and Tamayo were at a loss about how to use Muzan's blood, Yosuke's demon crow flew into the clinic.

"Hehe... Yoriichi Tsugikuni has joined the Demon Slayer Corps."

After giving his report, the ghost crow flew out of the clinic, and Yosuke looked excited.

Tamayo asked with a puzzled look, "You've been paying attention to this Yoriichi Tsugikuni. Is there anything special about him?"

Yosuke explained, "To put it this way, every living thing has a natural enemy, and Yoriichi Tsugikuni is the natural enemy of us demons!"

Tamayo was somewhat skeptical of Yosuke's words. If demons had natural enemies, then they wouldn't be rampaging through the human world. The current Demon Slayer Corps hunts demons entirely by sheer numbers, piling up corpses.

"You may not believe it, but Tamayo, let's wait and see. Our natural enemy has arrived, and the war between humans and demons is about to begin!"

Seeing Yosuke's confidence in Yoriichi Tsugikuni, Tamayo also chose to temporarily trust Yosuke: "So what do we do next?"

"We'll first contact Yoriichi Tsugikuni, gain his trust as much as possible, and then work together to hunt down Muzan Kibutsuji!"

However, because Yosuke and Tamayo's whereabouts are always elusive, their search for Yosuke is not going smoothly.

Yosuke's demon crow finally found Yoriichi Tsugikuni, but got too close to him and was mistaken for Muzan Kibutsuji's demon and killed by the Demon Slayer Corps.

They intended to approach the Demon Slayer Corps directly, but the Ubuyashiki clan members were extremely sensitive to Yosuke's aura. As soon as Yosuke appeared, they didn't give him a chance to speak; dozens or even hundreds of Demon Slayer Corps members wielding Nichirin Blades attacked him.

Fearing he might hurt them, Yosuke had no choice but to give up.

Frustrated, Yosuke returned to Tamayo's clinic and lay down on a chair, complaining to Tamayo, "This is so frustrating! I hadn't even uttered a single word before a bunch of people started attacking me with knives. Am I the demon or are they the demons?!"

Seeing Yosuke so frustrated, Tamayo covered her mouth and chuckled.

"Tamayo, you should contact the Demon Slayer Corps. The Ubuyashiki bloodline and the aura of the Demon King in my body are too sensitive to them."

Tamayo understood Yosuke very well and said considerately, "I understand."

Yosuke rolled over and got out of bed. He took out an empty bottle, cut a wound on his palm with his fingernail, and let the blood flow into the bottle.

After filling the empty bottle, Yosuke handed it to Tamayo: "Now most of the Demon Slayer Corps members have learned the Breathing Technique, and their combat power has increased dramatically. If those people in the Demon Slayer Corps act unreasonably, Tamayo, just drink it. Unless you encounter Yoriichi Tsugikuni, no one else can stop you."

Tamayo took the blood vial and carefully placed it close to her body.

"Let's split up for now, and meet again once everything is ready."

——

Edo area

A samurai wearing a straw hat and carrying a katana at his waist walks through the streets at night.

A year has passed since Yosuke parted ways with Tamayo, and during this time, Yosuke has been on his path of slaying demons.

Upon entering an izakaya, Yosuke ordered a pot of sake and sat in a corner to sip it.