I, Umo Tengen bravely venture into the world of Naruto

Night, Demon Slayer Headquarters.

"Tianyuan, are you really going back tonight?"

In the inner room, Ubuya Shiki Yaoya's expression was particularly solemn as he looked at Utsuo Tengen who was sitting in front of him.

"Yes, my lord!"

Yuzhuang Tianyuan nodded and handed the Sun Lun Dao placed next to him in front of his lord.

"Tanjiro's Nichirin Sword, I ask you, my lord, to deliver it to him."

"As for the practice of Sun Breathing, I must go back and find out..."

Yes, just this afternoon, when I was trying to cast the God of Fire Kagura in the yard.

Relying on his strong strength and understanding of the breathing method, Yuzhuang Tianyuan easily changed his breathing and tried to use the God of Fire Kagura.

In the process of using Kagura, the God of Fire, he felt a power as hot as the sun.

Sword skills of this intensity are definitely the most deadly to evil spirits who are extremely afraid of sunlight.

At the moment when this feeling appeared, Yuzhuang Tianyuan was basically certain that Kagura, the God of Fire, was the most powerful breathing method that surpassed the five basic breathing schools, Sun Breathing.

Originally, when wielding the sword to perform the round dance, Yuzhuang Tianyuan had absolute confidence that he could try all the moves of Kagura, the God of Fire, the Breath of the Sun.

But what he didn't expect was that he was only halfway through the round dance.

The combination of his body and breathing methods made him feel a strong sense of rejection.

Yu Zhuan Tianyuan is no stranger to this feeling.

Just like practicing the ninjutsu of Minato's time and space in one's own time and space, it is the repulsion from the time and space dimension.

Repulsion in the space-time dimension?

Yu Zhuan Tianyuan was very surprised to receive such information.

The source of Mingming's Breath of the Sun is the first-generation swordsman named Enichi Tsukuni in the Demon Slayer Corps.

But why did he feel a sense of rejection from the time and space dimension when he tried to use the Breath of the Sun?

Is it...

That first-generation swordsman named Enichi Tsukuni was an outsider from another time and space?

Or is it like him, who accidentally went to other time and space to learn such a powerful breathing method?

These questions appeared in Yu Zhuan Tianyuan's mind when he fell to the ground in the afternoon.

Immediately, Uzhuan Tianyuan stood up and briefly greeted his lord, then teleported and reappeared in the Butterfly House courtyard and found Tanjiro.

Uzuki Tengen had a brief fight with Tanjiro in the butterfly house's courtyard on the pretext of starting special training for pillar instruction in advance.

Tanjiro's performance in the fight shocked Uzuki Tengen even more.

Without any feeling of repulsion like him, Tanjiro easily used Breath of the Sun, which is what he called Kagura, the God of Fire.

Even on the way to using Breath of the Sun, his body could not fully withstand the power of the sword skill of Breath of the Sun.

Tanjiro was actually able to use the Breath of the Sun and the Breath of the Water.

The flames are accompanied by flowing water, and Tanjiro can actually use two completely different breathing methods for fighting at the same time.

Although such use has indeed weakened the power of Sun Breath's move, but with the continuous flow of water, Tanjiro's endurance has reached a level that is comparable to that of a pillar-level swordsman of the Demon Slayer Corps!

Tanjiro can use Breath of the Sun at will.

This also overturned the doubts that had appeared in his mind before.

Tsukuni Enichi is not a swordsman from other time and space or who has traveled to other time and space as he thought.

Breath of the Sun indeed comes from their own time and space.

In this case, the feeling of repulsion in the space-time dimension...

Until he saw the Nichirin sword with the word "annihilation" engraved on it in Tanjiro's hand.

Uzuki Tianyuan suddenly reacted after a brief fight with Tanjiro.

He proposed to Tanjiro the idea of ​​borrowing his Nichirin Sword.

Tanjiro nodded decisively and agreed, and Uzuki Tengen got the Nichirin Sword.

The moment he touched the Nichirin Sword, he felt an extremely powerful power hidden in the blade.

With the help of this sun blade, Yuzhuang Tianyuan easily performed the Sun Breathing move.

Although he still felt a vague feeling of rejection, this feeling did not make him breathless like before.

Yuzhuang Tianyuan determined that this Nichirin Sword was the sword of the first-generation swordsman, Jigoku Yuenichi.

He also once believed that Tanjiro was able to use the Breath of the Sun so easily because of this Nichirin sword.

But as Tanjiro explained again about Kagura, the God of Fire, and his ghost-killing experience since joining the team.

But it overturned Yu Zhuan Tianyuan's guess again.

Breath of the Sun, Tanjiro can still use it normally without the Nichirin Sword.

To him, this Nichirin Sword was just a knife used to cut the neck of evil spirits when using the breathing method.

Uzuki Tengen returned to the Demon Slayer Headquarters with Tanjiro's Nichirin Sword.

After a detailed discussion with the lord, all the doubt points and the actual situation were added up.

Finally, they got an answer.

That is the Breath of the Sun, a breathing method created by Jiguo Enichi that transcends the dimensions of time and space!

When thinking of the five basic breathing techniques derived from the Breath of the Sun, as well as Enichi Tsukuni's experience of being expelled from the Demon Slayer Corps, there are still a few remaining historical materials of the Demon Slayer Corps.

A past that was erased by time was pieced together by Uku Tengen and Ubuyashiki Yōya and reappeared.

The reason why Tsukikuni Enichi, a powerful swordsman, was expelled from the Demon Slayer Corps.

There is a great possibility that he had personally encountered Muzan Kibutsuji at some point in time.

There must be a big battle between him and Kibutsuji Muzan.

In that battle, there was no doubt that Jiguoyuanyi would win, and it would be an absolute victory.

Tsuji Mumei is no match for Enichi Tsukuni, who created Breath of the Sun.

But the cunning creature used some unknown means to escape just before it was about to be killed by Ji Guoyuan.

Tsujikuni Enichi failed to kill Demon Slayer Tsuji, and after receiving the news, the Demon Slayer Corps expelled him from the Demon Slayer Corps with great blame.

Because of the fear of Tsukuni Enichi, Ghost Dance Tsuji Muzan began to lie dormant. It was not until Tsukuni Enichi grew old and died that it dared to appear in the human world again.

This is why, from the historical documents, there are no traces of evil spirits in a period of nearly a hundred years...

Both Utsuo Tengen and Ubuyashiki Yōya believe that their speculations about this period of Demon Slayer history are pretty accurate.

But at this stage, the Demon Slayer Squad, except for Tanjiro, even Utaka Tengen is unable to master the Breath of the Sun.

Tanjiro is probably the key to killing Muzan.

But if you pin everything on Tanjiro, who is still just a boy.

Not to mention Utaka Tengen, even Uyashiki Yōya would never let Tanjiro take this risk.

No one can know how strong Kibutsuji Muzan is.

Then, I thought that the breathing of the sun is a breathing method that transcends the dimensions of time and space.

Yuzhuan Tianyuan guessed that if it was in Minato's time and space, maybe he could successfully practice it?

It just so happened that in Minato's time and space, his teacher Jiraiya was about to take him to practice immortal arts.

On the way to practice immortal arts, I also tried to practice the breathing of the sun.

If everything goes well, when he comes back next time...

It must be the time when Onimbutsuji Mukai will be destroyed!