Both start in hell: but their talents are multiplied a hundredfold.

Shen Jue released the Nichirin Blade, and his fair fingers showed not a single scratch.

"It's truly terrifying. It's hard to believe that you, who have never learned breathing techniques, could be so strong," the Water Pillar exclaimed, his strength being roughly equal to that of the Flame Pillar.

If he were to be the pillar to test Shen Jue's strength, he would probably suffer the same fate as the Flame Pillar.

The two little girls from the Ubuyashiki family both showed expressions of surprise.

Shen Jue's behavior was no longer human.

Even the strongest demons among the Twelve Demon Moons couldn't possibly manipulate the Flame Pillar so easily.

"With such immense power, why do you still wish to join my Demon Slayer Corps?" A man's voice echoed from a room in the courtyard.

The pillars present immediately bowed respectfully and said in unison, "My lord!"

Shen Jue did not see the current lord of the Ubuyashiki family, but his superhuman senses allowed him to clearly perceive the fragility of life among the people inside the house.

Muzan Kibutsuji, the progenitor of demons, was not a monster that appeared out of thin air; he was one of the ancestors of the Ubuyashiki family.

A thousand years ago, Muzan, a human, was suffering from a terminal illness. In the process of seeking treatment, he mutated into the first "demon" due to a failed drug experiment.

Muzan's mutation was like planting a time bomb in the genes of the Ubuyashiki family. This "contamination" was passed down through bloodlines, inflicting cruel punishment on future generations.

The heads of the Ubuyashiki family and male members throughout history have never lived past the age of 30. Due to the disease, every adult male in the Ubuyashiki family has died in decay and pain.

To defy this fate, the Ubuyashiki family founded the "Demon Slayer Corps," making "eliminating Muzan Kibutsuji" their highest mission.

Only by eliminating the originators of the curse at its source can this thousand-year-old tragedy be ended.

"I want to learn the method of breathing exercises, and at the same time, I want to kill all the demons."

Shen Jue said softly, "The ghost killed my last relative. I am willing to give anything to kill the ghost."

Shen Jue's tone was gentle, but everyone present could feel the determination in his heart.

"Then I will recommend a trainer for you, and I hope you can achieve your wish soon." Kagaya Ubuyashiki did not appear, but he agreed to Shen Jue's request.

Shen Jue immediately requested, "Could I ask one of the Pillars to be my trainer?"

Trainers are an indispensable part of the Demon Slayer Corps system; they are the swordsmen's mentors and guides.

Most of the trainers are retired pillars.

The Demon Slayer Corps recruits members year-round, but it is difficult for ordinary people to directly confront demons.

Therefore, to join the Demon Slayer Corps, one usually needs to first become an apprentice of a trainer and undergo rigorous training, learning "breathing techniques" and combat skills until one is qualified to participate in the "Final Selection".

Even Shen Jue could not avoid this step.

The battle with demons is not a contest of strength.

The timing, rhythm, and experience of the battle all determine the outcome of the fight against the demon.

"I request that Ms. Shinobu Kocho, the Insect Pillar, be my trainer," Shen Jue continued.

Shinobu Kocho, the Insect Pillar, looked at Shen Jue with her purple eyes, quite surprised.

She hadn't expected Shen Jue to make such a request.

Shen Jue smiled gently at the insect pillar and butterfly.

After a long silence, Kagaya Ubuyashiki finally said, "That's acceptable."

Shen Jue winked at the Insect Pillar Butterfly Shinobu.

Several days later, in the Butterfly Mansion deep in the mountains, the most important healing and rehabilitation base for the Demon Slayer Corps.

Shen Jue has become familiar with the girls in the Butterfly House. Kocho Shinobu's stepson, Kurihana Kanao, who is also Kocho Shinobu's adopted sister, loves to hang around Shen Jue.

After Shen Jue performed a feat of throwing a multi-ton artificial mountain in the courtyard into the air with one hand and catching it steadily.

The little girls from the Butterfly Mansion were all incredibly beautiful.

Faced with Shen Jue's display of power, after several days of rest, Butterfly Ninja finally couldn't resist calling Shen Jue to the flower room where wisteria flowers were cultivated.

Shinobu Kocho changed into very casual clothes. Her petite figure and cute face made Shen Jue look her up and down for a while.

Shinobu Kocho had long been used to Shen Jue's gaze; during those days of traveling, Shen Jue also enjoyed staring at her in the same way.

"Shen Jue, why did you choose me to be your trainer?" Shinobu Kocho asked calmly.

"Flower Breathing is a breathing technique suitable for women."

"My Insect Breathing is a branch of Flower Breathing that I developed to overcome the weakness of insufficient arm strength."

"Shen Jue, the Breath of Insects is not suitable for you."

Shen Jue shook his head and smiled, "No matter which existing breathing method I use, it won't be of much help to me. I'd rather create my own breathing method."

"Even though the Demon Slayer Corps swordsmen possess physical abilities and reflexes far exceeding those of ordinary people, honed through breathing techniques, and sword skills comparable to magic."

Shen Jue looked directly into Shinobu Kocho's purple eyes and said, "In my opinion, the Demon Slayer Corps' swordsmen are too weak."

"How could a mere cannibalistic monster capable of breaking steel possibly compare to a human body forged through countless trials?"

"Lord Shen Jue, are you joking?" Butterfly Shinobu was puzzled; she almost thought Shen Jue was joking.

"I'm not joking," Shen Jue said slowly. "Miss Shinobu Kocho, I hope to use your extensive knowledge of pharmacology and toxicology to refine the concept in my mind."

"I want to make the demon race realize their own fragility and powerlessness."

Shinobu Kocho couldn't believe it, but at Shen Jue's request, she began to teach him Flower Breathing.

On the first day, Shen Jue learned Flower Breathing. When she slashed, pink petals fell, reminding Shinobu of her deceased sister.

The next day, the Water Pillar, Giyu Tomioka, arrived. To his astonishment and disbelief, Shen Jue learned the Water Breathing technique, unleashing towering waves with each strike.

On the third day, Yan Zhu arrived. Amidst Yan Zhu's loud laughter, Shen Jue drew his sword and unleashed a raging sea of ​​fire, the intense heat distorting the air.

On the fourth day, Yan Zhu arrived, briefly interacted with Shen Jue, and then left, leaving Shen Jue somewhat disappointed.

That night, when Shen Jue was learning pharmacology from Shinobu Kocho, she complained that the reason why the Stone Pillar's Rock Breathing technique was the strongest and most difficult to master was simply because the Stone Pillar had the greatest strength.

It's very difficult for others to replicate.

On the fifth day, no Pillars arrived. Shen Jue taught himself the Lightning Breathing Technique, and his slashes were so fast that even Shinobu Kocho couldn't tell what they were.

Shen Jue then abandoned the idea, saying that a man shouldn't be so hasty.

On the sixth day, Shen Jue taught himself the Breathing of Wind technique, and the whirlwind he generated almost uprooted all the large trees around the Butterfly House.

On the seventh day, Shen Jue remained motionless.

On the evening of the seventh day, Shen Jue smiled, and then a black film covered the ordinary steel longsword.

Shen Jue successfully transformed his training method of Armament Haki into what he named "Power Breathing Technique".