Simultaneous time travel: But our system is out of sync!

Seeing this scene, apart from Lin Bei and Urokodaki Sakonji, who already knew that sunlight was devastating to demons, Tanjiro and Nezuko were all stunned.

Midouzi, who was already hiding in the room, hid in a corner where the sun would never shine.

Tanjiro finally understood why Lin Bei didn't want Nezuko to get any sunlight.

He had initially thought the sun would harm the beans.

But unexpectedly, the ghost turned to ashes under the sun.

At that moment, Urokodaki Sakonji's soft voice rang out.

"A ghost is a monster with extremely strong vitality."

"Ordinary demons can be killed by cutting off their heads or destroying their hearts."

"And some slightly special ghosts, like the one we just saw."

"Even if their heads are cut off, they can survive for a period of time."

"To kill them completely, you must destroy both their heads and hearts at the same time."

"Or, expose it to the sun."

As he spoke, he turned to look at Lin Bei and Tanjiro.

"Either you learn the breathing technique."

"With powerful breathing techniques combined with powerful swordsmanship, one can easily slay evil spirits."

Tanjiro's eyes lit up immediately upon hearing Urokodaki Sakonji's words.

He took two steps forward, staring intently at Urokodaki Sakonji.

"Master, may I learn breathing techniques?"

He already harbored a deep hatred for evil spirits.

Coupled with what he had just witnessed, he became extremely interested in the breathing technique that Urokodaki Sakonji had mentioned.

Seeing the burning passion and hatred for demons in Tanjiro's eyes, Urokodaki Sakonji was very satisfied.

After all, only someone like that can bring the breathing technique to its fullest potential.

"sure!"

Urokodaki Sakonji nodded.

In addition to certainty, there was also an enigmatic smile in his eyes.

"Seeing how enthusiastic you are, then you shall come with me to the mountain to cultivate now!"

Tanjiro was taken aback when he heard what Urokodaki Sakonji said.

"Now?"

"But we haven't rested for a whole day and night, and we haven't even eaten!"

"And glutinous rice beans..."

Sensing Tanjiro's hesitation, Urokodaki Sakonji's tone became more forceful.

"That's right, now!"

"Haven't you heard the old saying from the ancient Eastern country?"

"When Heaven is about to place a great responsibility on a person, it first tests their will and strengthens their body."

"To become a true strong person, one must be able to overcome physical fatigue and pain, and draw nourishment from fatigue and pain."

"As for the beans!"

"I don't think you need to worry about anything."

"Both I and your older brother will take care of her."

Lin Bei nodded in response, reassuring Tanjiro.

Seeing this, the hesitation in Tanjiro's eyes disappeared.

He was never a lazy person.

And that last weakness had long been eliminated by Lin Bei.

The question I just asked was based on habit.

Simply because Lin Bei is someone who advocates for regular work and rest schedules.

Even while traveling, it's important to maintain a regular schedule.

After all, both Tanjiro and Nezuko are in the stage of growing up.

Having stopped worrying, Tanjiro no longer hesitated.

"Master, let's set off!"

Seeing this, Urokodaki Sakonji didn't say anything more and led the way up the mountain.

After settling Mi Douzi in and making her stay in the house to wait for their return, Lin Bei also went up the mountain with them.

The place where we encountered the evil spirits was actually at the foot of the mountain.

The place where Urokodaki Sakonji lived was not much higher than the place where he encountered the demon.

The mountain is very high, and the further you go, the more trees there are, and the darker the environment becomes.

After walking for a while, Tanjiro noticed that his muscles started to ache, his legs became heavy, and his breathing became labored.

However, Urokodaki Sakonji, who was leading the way, seemed completely unaffected, maintaining an almost constant speed and slowly leaving him behind.

Lin Bei, though seemingly walking alongside him, appeared to be strolling leisurely, showing no signs of exertion whatsoever.

In fact, Lin Bei had already noticed the special nature of this mountain when he was halfway there.

Aside from being exceptionally high.

As you climb a certain distance, the oxygen content in the air decreases significantly, and the high humidity makes breathing very difficult.

Especially for Tanjiro.

His well-developed muscles gave him great strength, but they also made him need more oxygen than the average person.

That's why he felt increasingly tired.

But Lin Bei did not help Tanjiro.

Instead, he quickened his pace and soon caught up with Urokodaki Sakonji, who was walking ahead.

Because Lin Bei knew that this was Tanjiro's training.

This is the first step in mastering breathing techniques.

It was this extreme environment that forced Tanjiro to instinctively adjust his breathing rhythm and adapt his body to a situation that required both a lack of oxygen and high-intensity exercise.

Sure enough, after seeing Lin Bei and Urokodaki Sakonji gradually disappear from his sight, Tanjiro's stubbornness and unwillingness to admit defeat immediately surged up.

He wanted to become stronger and keep up with everyone else.

So, instinctively, he began to adjust his breathing rhythm and walking pace little by little.

As he adjusted, Tanjiro keenly realized that he wasn't as tired as before.

He was overjoyed and was about to quicken his pace.

This caused a sudden disruption to my breathing rhythm, resulting in a burning pain in my lungs and a feeling of numbness and pain in all the muscles in my body, as if they were twisted together.

"hiss……"

Tanjiro managed to stay upright and not fall.

He knew he had been a little too hasty.

He remembered something Lin Bei had once told him.

"Haste makes waste."

To accomplish something, perseverance is the most important thing.

So he readjusted his breathing and, after the discomfort subsided, resumed his journey.

This time, however, Tanjiro was no longer in a hurry, no longer eager to catch up.

Instead, they are down-to-earth and take things one step at a time.

They headed towards Urokodaki Sakonji and Hayashi Kita.

On a cliffside clearing in the mountains, Lin Bei and Urokodaki Sakonji stood together.

This is the perfect spot to see Tanjiro struggling to climb the mountain.

So they also witnessed what Tanjiro had just done.

Urokodaki Sakonji's voice came from behind.

"Tanjiro is even more outstanding than I imagined."

Upon hearing this, Lin Bei slightly raised his chin, his tone revealing undisguised pride.

"Of course, you don't even know who trained them."

However, what Urokodaki Sakonji said next made Lin Bei blush.

"I almost got led astray."

Upon hearing this, Lin Bei naturally understood who Urokodaki Sakonji was referring to.

Lin Bei immediately retorted:

"Don't talk nonsense, that's scientific training."

However, faced with Lin Bei's sophistry, Urokodaki Sakonji defeated Lin Bei with just one sentence.

"Whose scientific training program would say that you can train your brain into muscles and eventually turn it into a giant muscle ball?"