When a wolf enters a tiger's territory, it naturally has to follow the tiger's rules.
But when a tiger enters a wolf's territory, there's no need to obey its commands.
This is the comparison between the power systems of Hunter x Hunter and Demon Slayer.
This is also the suppression of lower-level power by higher-level power.
Although Oboro couldn't break the rules of this world, within the limited rules, reversing the balance was effortless.
In Demon Slayer, there is a concept of 'soul' as a power system. Almost all demons, after being killed, recall their past lives, experiencing a montage... including Gyutaro and Daki's deaths, and the notion of 'going to hell,' all relate to this.
More notably, it's the death of Akaza, Upper Rank Three.
In fact, many demons ultimately perish due to 'suicide.'
Self-destruction of the soul.
And the physical body and soul are closely related.
If the soul, or will, doesn't fluctuate, with a demon's regenerative ability, they cannot be killed without a Nichirin Blade. The stronger the demon, the more terrifying its regeneration, and the harder it is to kill.
Although Oboro's soul has been diminished and no longer possesses specialized abilities in this regard, his experience and intuition remain. With his existing soul power alone, in the world of Demon Slayer, it's still on an unimaginable level.
Will... is also a part of the Hunter x Hunter power system.
It all comes back to the same thing.
By attacking and inflicting soul damage or changes, demons can be killed.
But only he can do it.
The swordsmen of this world, including Yoriichi Tsugikuni, probably cannot even touch the hidden 'soul' aspect.
The soul techniques he uses... can cause demonic beings to die in endless agony, or to perish in 'bliss.'
This attempt further proved Oboro's thoughts and speculations.
For a low-level world, he... is a person full of bugs.
He can do many impossible things.
"Mas... Master..."
A maid snapped back to reality and rushed over, exclaiming in shock upon seeing the bloodstains on Oboro's hand.
"It's nothing... Let's go."
Oboro waved his hand, slowly sheathing his sword.
Just one swing of the sword made the muscles in his arm ache intensely.
The other surviving maid picked up the fallen haori and draped it over Oboro. The three abandoned the sedan chair and continued their journey along the blood-stained mountain path, braving the wind and snow.
The two maids were terrified, but for Oboro, it wasn't even a minor incident.
Before leaving, Oboro glanced at the dark house in the distance... there were still survivors inside.
After the two maids, one on each side, helped Oboro disappear into the snow, a strange noise finally came from the room where candlelight had just appeared.
Immediately after, a person in a Demon Slayer Corps uniform, covered in wounds, walked out, staring blankly in the direction Oboro had disappeared, his gaze unfocused.
He saw... That person used an ordinary samurai sword to kill the demon.
Incredible!
How is this possible...
He was absolutely sure. As an Otsuki-ranked member of the Demon Slayer Corps, with extensive experience and a record of hunting demons... he could tell at a glance whether the sword was a Nichirin Blade or not.
Originally, he had received news from his Kasugai Crow that there were traces of a demon on this mountain. Recently, many people passing through the mountains had died, so he had been dispatched.
With his skills, he could have defeated the demon, but some complications arose: a group of fleeing refugees were also attacked.
The demon used the lives of these ordinary people as a threat, tying him down, injuring him, and imprisoning him in the house.
It didn't kill him immediately but deliberately tortured him... and even ate living people in front of him.
Just then, there was movement on the mountain path outside the door, and someone else was coming...
Then, the demon began hunting again.
But this time, it encountered a tough opponent.
Its Blood Demon Art, which allowed it to become invisible, was completely ineffective under the cover of night.
It was killed with a single strike...
The scene and spectacle when the sword light flashed were, in his eyes, simply... magnificent.
He couldn't understand what level of breathing and swordsmanship a person had to reach to display such elegance.
At least... he had never seen it before.
"It can't be a trainer, nor a member of the Demon Slayer Corps... I've never felt such breathing..."
"Pale complexion, seemingly gravely ill, with long, curly black hair... Ah, the most striking thing is that thick, wide black haori, suggesting a prominent status..."
Yanagiwara, not yet twenty, muttered to himself and then hit his fist in annoyance after regaining his senses.
"I should thank him."
After all, that person had saved his life.
"First, I must inform Master."
...
The next day, Oboro and the two maids finally arrived at the town at the foot of Mount Okumoto Toriyama after a long journey.
During the journey, Oboro noticed that the surviving Demon Slayer swordsman wanted to pursue them. With his pace and speed, he couldn't shake him off, so he led the two maids on a different route.
Furthermore, it had been snowing heavily, quickly erasing the footprints on the ground, so the two parties did not interact.
After a simple rest at an inn in town, Oboro headed up the mountain to meet Kamado Tanpei.
He didn't know how many generations Kamado Tanpei was from Kamado Tanjiro's ancestor.
The town was not large, and with a little inquiry, they found out where Kamado Tanpei lived.
Every so often, Kamado Tanpei would come down the mountain to sell charcoal, just like Tanjiro in the original story. He had a good reputation among the local villagers.
However, Oboro's timing was unfortunate. Kamado Tanpei had just come down the mountain to sell charcoal a few days ago, so... he wouldn't be back for a while.
The town at this time was not as clean and tidy as it would be a hundred years later, and there were fewer people...
But in this chaotic era, its unique geographical location made it a tranquil haven, a secluded paradise.
At least it wouldn't be frequently affected by battles.
At noon, the sky was clear.
The thick snow layer on the mountain had covered the path, but the traces of human passage were still visible.
The mountain didn't look large from the town, but the slope was actually quite steep. Coupled with the environment, it was very difficult to walk. Even with normal stamina, it was hard to climb continuously.
At the foot of the mountain lived some scattered hunters. Seeing Oboro and the two maids, they were greatly surprised, especially by Oboro's attire. For people in such a small place, he was a rare important figure.
An elderly person kindly struck up a conversation, indicating that going up the mountain at this time was somewhat dangerous.
Upon learning that Oboro was looking for Kamado Tanpei, the elder enthusiastically showed them the way, pointing in the direction.
In the anime, Tanjiro seemed to walk effortlessly on the mountain path. After Oboro's climb, he was panting, almost unable to breathe, his head throbbing.
His body was still too weak...
He needed to hurry with the matter of blood.
But Oboro disdained the blood of ordinary demons.
Even Lower Rank demons were meaningless; Upper Rank demons were barely qualified.
After a long time, as dusk approached, Oboro finally spotted a small house standing in a clearing in the forest.
He had arrived.
Not far away, a small boy wearing a cotton-filled kimono, holding a small axe, was struggling to chop firewood. His cheeks were flushed red, and he looked about seven or eight years old.
His clothes had patches, and his innocent, simple, dark, and bright, watery eyes were very cute.
He wore straw sandals, but the cotton cloth wrapped around his lower legs was very thick.
His mouth constantly exhaled hot air.
Hearing the sound, he stopped his actions and looked over blankly.
"Ah... hello."
Seeing a stranger, the little boy showed no fear. Instead, he dropped the axe first and politely bowed to the man who appeared before him.
"What's your name?"
Oboro asked, covering his mouth with a clean white handkerchief and coughing, his voice gentle.
"Tanjiro, my name is Kamado Tanjiro."
The boy looked up, not at all shy.
"Hello, Tanjiro, my name is Oboro... It's nice to meet you."
A cold wind howled, causing the already cleared snow on the ground to be covered with a layer of ice crystals again.
Swirling snow mist swirled around Oboro. In the eyes of the little Tanjiro, Oboro's haori fluttered in the wind, his messy black hair lifted, revealing a 'beautiful' face he had never seen before. The calm and gentle smile on his face gave the man a unique aura.
In the interplay of light and shadow, he seemed to merge with heaven and earth, becoming a painting.
For a moment, Tanjiro was stunned.
At this moment, hearing the sound, the door of the house in the distance was pushed open.
"Father... someone's here."
Tanjiro's small face turned red, and he ran back somewhat awkwardly.
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