With a reputation of 70,000, one leader travels across countless worlds with his adventure team.

Four days later, after the Pillars had finished arranging their respective supervisory areas and team affairs, the first batch of five Pillar-level members began special training:

The Flame Pillar: Kyojuro Rengoku, the Insect Pillar: Shinobu Kocho, the Water Pillar: Giyu Tomioka, the Mist Pillar: Muichiro Tokito, the Stone Pillar: Gyomei Himejima, along with Tanjiro, Zenitsu Agatsuma, and Inosuke, a total of eight people, began to participate in the special training of "Yi Jin Jing" and "Flame Blade" organized by Hakutaku.

Bai Ze first explained the key points of the Yi Jin Jing to everyone:

"Yi" means change, alteration, or replacement; "Jin" refers to tendons, bones, and fascia; and "Jing" carries the meaning of guide or code. The Yi Jin Jing is an internal cultivation method that changes tendons and bones and opens up the meridians throughout the body by cultivating the true qi in the dantian.

After cultivating to a certain level, one can reach the state of 'internal strength'. At that time, one can easily break bricks and split stones by circulating qi and energy. At that time, using breathing techniques will be extremely easy and will not put any pressure on the body.

The ancient Yi Jin Jing postures and training methods consist of 12 postures, namely Wei Tuo Offering Pestle (3 postures), Picking Stars and Changing Constellations, Three Plates Landing, Extending Claws and Spreading Wings, Pulling Nine Oxen by the Tail, Nine Ghosts Pulling Horse Knife, Green Dragon Probing Claws, Crouching Tiger Pouncing on Prey, Bowing Posture, and Gongwei Posture.

Bai Ze explained the key points of his and Qiao Feng's study of the Yi Jin Jing one by one, which made the pillars break out in a cold sweat. The essence of the Yi Jin Jing was far more extensive than the knowledge they had acquired about their own breathing techniques and sword skills.

For the next ten days or so, Zhongzhu and the three little ones transformed into cultured individuals, studying the essence of the Yijinjing and the 12 postures taught by Bai Ze every day.

The ones who improved the most were the Mist Pillars: Muichiro Tokito, Shinobu Kocho, and Tanjiro. The two were geniuses, while Shinobu Kocho trained every day with the determination to learn the techniques to improve her strength and avenge her sister.

The Stone Pillar: Because Gyomei Himejima is blind, his good older brother Kyojuro Rengoku still explains things to him while he trains every day. During this time, the Stone Pillar transforms into a water pillar, training constantly and shedding tears every day.

Both of them are making rapid progress. Inosuke is also absorbing knowledge quickly. Back when he could read in the mountains and in the old man's arms, he was able to learn to read. Now, wanting to become stronger and become number one, Inosuke is definitely not slacking off and is improving every day.

Zenitsu is the laziest and most cunning of all. Every time he reads a book, he gets a headache, his legs hurt, and he can't see because the poison from before hasn't been completely cured. He's so lazy that in the end, the merciless water pillar, Giyu Tomioka, has to supervise him every day.

 …

More than a month later, the first batch of special trainees on the training ground entered the second stage of special training, breaking giant rocks with their bare hands!

During this period, everyone's muscles, bones, and internal organs have been greatly strengthened. The most obvious example is the Stone Pillar: Gyomei Himejima. Now, Gyomei can use his hands as swords without a knife to directly split boulders. He can split them as thin as you want!

The other Pillars are also making rapid progress, fully activating their breathing techniques and using their own breathing sword techniques. The time they can hold their breath is several times longer than before. Tanjiro is even able to use Hinokami Kagura (Sun Breathing) for several consecutive moves without experiencing breathing disorders, dizziness, or being unable to move.

Everyone who participated in the training felt that their muscles, bones, and internal organs were stronger than before, and they could use the breathing method more freely without worrying about overexerting their bodies. Moreover, the energy of the breathing method was more solid and profound.

When sparring with others, my reaction speed, attack speed, and movement speed have all improved significantly. Previously, when it came to who was the fastest among the Sound Pillars, everyone agreed that Sound Pillar Uzui Tengen was number one, but now...

The Pillars' first thought was to teach the Pillars who hadn't yet developed their special abilities a lesson when the special training ended and they handed over the training to the second batch of Pillars.

Immediately afterwards, Bai Ze had the first batch of special trainees begin training in the "Flame Blade". Every day, he had the pillars and the three little ones hold wooden swords and feel the flow of true energy, using breathing techniques to guide the true energy of the Flame Blade to the swords in their hands.

Then the Pillars went through the most brutal days of their training. Every day, Bai Ze made them wield wooden swords imbued with flames and fight him, attacking them with different attack speeds and bizarre angles.

The trainees also need to keep the flame blade's energy flowing to withstand their own attacks, thus accelerating their mastery of the flame blade and enabling them to maintain the free flow of the flame blade's energy at all times.

Very few of the trainees could multitask perfectly, and they were beaten black and blue by Bai Ze every day. Even Kocho Shinobu was not spared by Bai Ze.

However, Bai Ze had Raphael stay at the training ground every day as a support staff member. After everyone left, he would use healing skills on them, allowing them to leave the training ground completely unharmed. Then, the next day, they would continue to be beaten and healed.

A few days later, the trainees were finally able to use the Yi Jin Jing and the Flame Blade with ease, and even Zenitsu was able to release the Flame Blade's true energy at will without being tense.

The first batch of specially trained personnel were assessed on the day...

With the permission of the head of the family, Kagaya Ubuyashiki, Bai Ze led his trainees to the edge of a mountain forest in the afternoon. The Flame Pillar, Kyojuro Rengoku, asked Bai Ze:

"Does Lord Bai Ze bring us here at this time for some new training?"

Bai Ze smiled without speaking. At this moment, A Ying, Meng Meng, Serpent Pillar Obanai Iguro, and Sound Pillar Tengen Uzui emerged from the surrounding forest and surrounded the trainees.

Bai Ze drew the Meteorite Blade and said:

"Today is the end of your special training assessment day. We five are your examiners. The assessment will begin after sunset. You are restricted from leaving this clearing in the forest."

Furthermore, you can only use the Yi Jin Jing and the Flame Blade as defensive and offensive methods. If you can hold out until the sun completely sets, you'll pass; otherwise, you'll continue training with the second batch of trainees until you pass!

The first batch of trainees were all taken aback, with Zenitsu even starting to tremble with nervousness. The Pillars, on the other hand, were somewhat excited, eager to test the results of their training after this period of special training.

Immediately, the people inside the circle naturally formed a small circle back to back, drew their swords, and looked outwards at Bai Ze and his group. Bai Ze gave an order:

"start!"

The people on the outer perimeter launched attacks on the people in the inner circle. Mengmeng directly released an anti-gravity device into the inner circle, and then summoned the Frost Drill Cart to rush directly towards the Mist Pillar, Tokito Muichiro, who was closest to her.

Muichiro had been on guard against the cheerful little girl opposite him for a while. After sensing something was wrong with his feet, he immediately dodged out of the range of the anti-gravity device and slashed at Mengmeng with his sword imbued with the true energy of a flame sword.

The others were caught off guard by the sudden knockback. Only the Stone Pillar, Gyomei Himejima, and Tanjiro managed to react and dodge, while the others were affected by the upward shockwave.

The Serpent Pillar Obanai Iguro was facing Inosuke and Zenitsu. Obanai didn't hold back and directly unleashed the Third Form: Nest Strangles at the two, trying to entangle them and send them to their deaths.

Piggy mobilized all his muscles and unleashed the internal power of the Yi Jin Jing. Among the first batch of special trainees, the ones who benefited the most from the Yi Jin Jing training were Gyomei Himejima and Inosuke. Both of them were power-type athletes, and the Yi Jin Jing's further strengthening of their muscles and bones greatly benefited them.

Piggy twisted her body in mid-air in an incredible gesture, slashing directly at Obanai's breathing technique with her knife, and then escaped the chaotic center of the circle.

Zenitsu used a sneaky trick, changing the direction of his sword before Obanai's Third Form: Nest Sting could fully close, then took a hit on his buttocks and slipped out from under Obanai's attack.

For a time, they fought one-on-one in the arena. While dodging Bai Ze's attacks, they could also switch opponents. The effects of their special training, which had been humiliating for several days, were still evident.

In the chaotic scene, the specially trained group was able to calmly deal with the attacks that came at them at varying speeds, either dodging or using their flame blades to break through the energy of the attacks.

In the midst of the chaos, the Stone Pillar, Gyomei Himejima, suddenly had a moment of enlightenment during the battle. The explanation of the Transparent World by Bai Ze in the scrolling light rang in his ears. Gyomei, who relied on aura and sound to fight, felt the images in his mind.

Xingming took a deep breath, and the sounds around him suddenly became amplified in his ears. He could feel the movements of everyone around him, every swing of the sword, every shift, and every change of posture.

"I can sense it, Lord Bai Ze!"

The Stone Pillar, Gyomei Himejima, shouted excitedly, swinging his sword repeatedly to deflect one of Obanai's attacks. He then turned to the right and used his left hand to deflect Momo, who was riding a broomstick and attacking from the air, like lifting a stone ball.

Originally intending to launch a downward attack with her spun broom, Mengmeng shouted "Yahoo~" and flew out of the scene like the Big Bad Wolf. Zenitsu, who was being bound by Aying's Demon Binding Nails, was also rescued by Gyomei in time.

Sound Pillar Uzui Tengen noticed the abnormality in Gyomei's actions and charged forward while shouting "Glamour!" Gyomei did not rush to turn around to deal with Tengen who was rushing towards him. Instead, he grabbed Zenitsu and pushed him forward, then changed his position before turning around.

Aying, who had flown in from above intending to attack the two, saw Xingming's actions and laughed:

"Not bad, big monk!"

While attacking the Water Pillar, Giyu Tomioka, Bai Ze also witnessed a series of actions by the Stone Pillar, Gyomei Himejima. Combining this with Gyomei's shouts earlier, Bai Ze knew that Gyomei had activated the Transparent World and was fully aware of everything happening around him.

Bai Ze smiled and continued attacking the expressionless Tomioka Giyu. The sky gradually changed color amidst the battle, the sun slowly set, and the twilight sky made everyone in the forest's visibility drop.

Hakutaku seized the opportunity to send Shinobu Kocho, who was fighting him, out of the arena. Tanjiro, who had been sent there by the chaotic attack, also joined the battle between Hakutaku and Shinobu. Shinobu Kocho clearly understood Hakutaku's intention and said with a meaningful look in her eyes:

"Ah~ Is Lord Bai Ze going to deal with a 'weak woman' like me in front of a junior?"

Bai Ze smiled and said:

"If you say you're a 'weak woman,' those ghosts you poisoned would never agree. Quietly leave and participate in the next special training session!"

As Bai Ze spoke, he blocked Shinobu's slash with a parry. Without even turning his head, he instantly grabbed Tanjiro's wrist with his free left hand. Tanjiro opened his beady eyes and exclaimed, "Hey!" He hadn't expected that Lord Bai Ze's attack speed could be even faster.

Bai Ze directly threw Tanjiro towards Obanai, who was being brutally beaten by Gyomei. Obanai, who had not yet participated in special training, was no match for Gyomei, who had already awakened the Transparent World. All of his moves were seen through by Gyomei. Obanai, whose moves were being repeatedly countered, was struggling to figure out how to deal with the Stone Pillar who was now completely engrossed in the fight.

Tanjiro, who was flying in from the air with a "whoosh," was easily caught by Gyomei. Kage promptly replaced Obanai, who finally breathed a sigh of relief and turned to attack Zenitsu and Inosuke.

Bai Ze pressed the blade forward forcefully, bringing his face close to Shinobu Kocho's face, and said:

"Miss Shinobu Kocho, is it really impossible for you to accept my invitation? I have a few weapons with poison attacks that I would like you to appraise."

During this time, Bai Ze also tried to warm up his relationship with Shinobu Kocho. Now, after his special training, even if Shinobu Kocho couldn't defeat Upper Moon Two Doma, with him around, he would never let Shinobu Kocho get poisoned to feed the demon again.

"Oh my~ Is this a date invitation? Lord Bai Ze, now is not a good time to invite a lady~"

Shinobu Kocho, her smile unchanged, spoke softly.

Suddenly, Mengmeng's improved magic bullet flew from a distance and hit everyone. Flame Pillar Kyojuro Rengoku saw Mengmeng's skill and deflected the attack with his blade. The bullet continued to fly, hitting Inu in Inu's blind spot and then bouncing towards Shinobu Kocho.

Hakutaku saw the incoming star bullet and deliberately attacked to attract Shinobu Kocho's attention. Shinobu Kocho blocked several of Hakutaku's attacks in succession, and finally the star bullet successfully hit Shinobu Kocho's lower back.

Shinobu Kocho felt a jolt of electricity and involuntarily fell towards Hakutaku. Hakutaku quickly swung his right blade to the right and used his left hand to catch Shinobu Kocho. Shinobu Kocho's head, which was arched upwards, pressed directly against Hakutaku's face!

Shinobu Kocho kissed Hakutaku on the cheek. Hakutaku turned his head in surprise, and their lips met again because the force of the kiss hadn't dissipated!

Bai Ze's eyes widened as he savored the fragrant lips of Kocho Shinobu. Kocho Shinobu was also stunned by what happened in an instant and forgot to push Bai Ze away. The two of them remained locked in a tight embrace.

Suddenly, all movement ceased. The two groups of people, swords raised and being attacked, stopped there and watched the performance by Bai Ze and Kocho Shinobu.

At this moment, Mengmeng, who had flown out and returned to the edge of the battlefield to secretly release star missiles, which greatly helped Bai Ze, drove the Frost Drill Truck and rushed out happily, shouting.

The crowd returned to normal amidst the cute laughter. Shinobu Kocho quickly stabbed Hakutaku in the waist with the hilt of her right sword, then blushed and jumped away from the scene.

Bai Ze clutched his back and looked up at the distant sky. The sun was just a sliver of deep red hanging on the horizon. The trainees in the arena had all withstood today's assessment and hadn't been thrown out of the open area. Bai Ze glanced at A Ying, who was pouting and looking at him, and awkwardly scratched the back of his head, saying:

"Very good. Today you have successfully completed today's final assessment using the skills you learned in special training. Gyomei even successfully opened the Transparent World. The strength of our Demon Slayer Corps has reached a new level!"

Bai Ze sheathed his sword and continued:

"The first batch of special trainees has completed their assessments, and everyone has passed!"

Tanjiro and Zenitsu shouted excitedly.

"yeah!"

"Great! Finally, I don't have to get beaten up for reading anymore!"

The first batch of Pillars undergoing special training also had smiles on their faces. Even the Water Pillar, Giyu Tomioka, who always had a cold face, showed a slight smile. This was noticed by Tengen on the other side. Just as Tengen was about to say something, Giyu Tomioka saw that Tengen was about to speak and jumped away from the scene without giving Tengen a chance.

 …

That night, Bai Ze quietly finished his meal and didn't dare make any noise in the Butterfly House. He slept soundly through the night.

The next morning, Bai Ze reported the situation of the first batch of special trainees to Ubuyashiki Kagaya. Ubuyashiki Kagaya was also very happy that the strength of the trainees had greatly improved, and then asked Bai Ze to prepare to continue the special training of the second batch of remaining personnel.

This time, Bai Ze suggested that the Stone Pillar, Himejima Gyomei, also participate in the special training as a special training teacher, because the Transparent World opened by Gyomei is very important. Although Bai Ze's Blood Memory is similar in usage to the Transparent World, he cannot teach it to the Pillars himself.

Gyomei's transparent world can be systematically organized and taught to the Pillars. After listening to Hakutaku's words, Kagaya Ubuyashiki agreed to Hakutaku's proposal, so the second batch of special training teachers became two people: Hakutaku and the Stone Pillar, Gyomei Himejima.

 …

Apart from the Stone Pillar, Gyomei Himejima, who stayed behind, the other seven members of the first batch of special trainees—the Flame Pillar, Water Pillar, and Mist Pillar—began to take over from the Wind Pillar, Sanemi Shinazugawa, the Love Pillar, Mitsuri Kanroji, the Serpent Pillar, Obanai Iguro, and the Sound Pillar, Gengen Uzui—to carry out missions.

Tanjiro and his two companions are not going out for the time being. They will wait for Tanjiro's new sword to be delivered before they can set off again.

Shinobu Kocho stayed behind at the Butterfly Mansion to study the medicine given to her by Hakutaku, to see if she could break it down into different doses for use by the Demon Slayer Corps members.

In the days that followed, Bai Ze and Xing Ming transformed into devilish coaches and began to torture and train the second batch of special trainees. This time, with Xing Ming having successfully opened the Transparent World, the trainees had an additional project in their practice of the Yi Jin Jing: training their inner vision.

During the training of the Flame Blade, the Four Pillars were beaten quite a bit. Xingming, who had been beaten before, did not hold back and used the Transparent World to train the Pillars to an unbearable degree.

Thus, the second batch of trainees had a much faster pace of training, mastering both books in just over 20 days. Kanroji Mitsuri also successfully opened her inner vision and could hear the subtle sounds around her, just like Tengen.

This time, Bai Ze scheduled the assessment for the second batch of special trainees for midnight. Just like before, Bai Ze, A Ying, Meng Meng, and Bei Ming Yu Xing Ming served as examiners, and the four pillars had to stay until the sun had fully risen.

The Wind Pillar, whose strength had greatly improved during this special training, kept chasing after Bai Ze during the assessment, wanting to get revenge for the previous incident. Bai Ze didn't hold back either, activating the Free and Easy Divine Skill and using a bunch of skills to beat Sanemi severely. If it weren't for the help of Kanroji Mitsuri and Obanai, Sanemi would have been sent out of the assessment range by Bai Ze.

With this, all the Pillar-level members of the Demon Slayer Corps and the three little ones have successfully completed their special training and are ready to go out and cause trouble for the Twelve Strings.

 …