Demon Slayer: I am a Demon.

Shinobu Kocho also sensed her own impatience.

She felt ashamed, probably because this person looked down on her again. However, she had probably already embarrassed herself in front of this person several times before, so she was no longer as embarrassed as she had been at the beginning. But the girl's delicate face still flushed slightly.

Once Shinobu Kocho had calmed down, Su Mu looked at Urokodaki Sakonji and asked, "Urodaki-senpai should know something, right?"

Under the mask, Sakonji Urokodaki shook his head: "I do know about the Crimson Blade, the Mark, and the Transparent World. These are the realms that the original swordsmen could reach. Back then, these original swordsmen could even fight against Muzan Kibutsuji with these. But all of this has been lost. I only know the name."

"I don't really know much about what the Crimson Blade is, what the markings are, or what the Transparent World is like."

By now, besides him, there are probably not many others in the Demon Slayer Corps who know these things. At least, many of the Pillars don't know. The only one who knows these things is probably Makijuro Rengoku, who was just killed by Upper Moon Three.

Perhaps it was precisely because he knew these things that Rengoku Makijuro completely lost his fighting spirit.

Su Mu nodded, invited the group to have a drink, and then, amidst their anticipation, began to speak: "The so-called Crimson Blade is created by using powerful grip or through the collision of weapons, which raises the temperature of the blade, transforming it into a 'Crimson Blade.' Once a weapon becomes a Crimson Blade, it increases the damage it inflicts on demons, and the regeneration rate of the parts of the demon struck by the Crimson Blade will decrease..."

Su Mu spoke in a low voice, first explaining the principle of the 'Crimson Blade,' which was what he knew.

Upon hearing this, Urokodaki Sakonji also picked up his Nichirin Blade and gripped the hilt with his powerful grip.

"You need to transfer your own power to the blade to raise its temperature..."

Su Mu explained from the side.

As a 'Pillar', Sakonji Urokodaki is naturally extremely strong, but his strength is ultimately not enough. He can feel that as his grip strength increases, the blade does not heat up as quickly as he expected.

If all this is still in the midst of battle, achieving the 'Crimson Blade' will be extremely difficult. Perhaps, activating the 'Crimson Blade' at the moment of slashing at the demon's neck might be useful.

However, in regular combat, it is almost impossible to maintain this state at all times, and it can even be a hindrance.

Therefore, it's best to activate the 'Spots' before activating the 'Crimson Blade'.

Su Mu said in a low voice, "Once the 'spots' are activated, the body will unleash amazing power. At this time, activating the 'Crimson Blade' will be very easy."

How do I unlock the 'stripes'?

Shinobu Kocho asked from the side, explaining that she had also tried to activate the so-called 'Crimson Blade', but it was impossible to do so with her own grip strength. She thought that when she got back, she could try to see if she could achieve the 'Crimson Blade' through weapon collision.

"To activate the 'spots,' you need to reach a body temperature of 39 degrees Celsius, keep your whole body in a state of intense heat, and have your heart beat more than two hundred times. This requires 'breathing' accompanied by the inhalation of a large amount of oxygen, which accelerates the heartbeat to supply oxygen, providing a continuous source of power for the body's explosive power..."

Before Su Mu could finish speaking, Shinobu Kocho interrupted, "But in this state, the human body can hardly withstand it, especially the high temperature, which can be life-threatening."

As a doctor, Shinobu Kocho knew very well that the organs inside the human body are actually very fragile, and such a high temperature could easily trigger death.

"Therefore, once the 'spots' are activated, a person will be in an extremely dangerous state. Only by surviving this high-temperature state will the 'spots' appear on the body. Moreover, once the 'spots' appear, they act like a magnetic field, making those around them very likely to develop 'spots' as if in resonance..."

As he spoke, Su Mu said in a low voice, "So, activating the 'mark' is actually equivalent to overdrawing one's own life. Generally, people who activate the 'mark' almost never live past the age of twenty-five."

Upon hearing this, Urokodaki Sakonji roughly understood why the traditions of the 'spots' and 'crimson blades' had been severed.

At that moment, Tanjiro thought of his father: "So, the reason why the markings that suddenly appeared on my father's head were because..."

"Yes, Mr. Tanjuro lost his vitality so early precisely because he activated his 'scarlet'."

Hearing this, Tanjiro finally understood why his strong father had suddenly fallen ill and become incredibly weak, and why many doctors couldn't diagnose him.

Su Mu ignored the dejected Tanjiro and continued:

"As for the 'transparent world,' the key lies in the precision of breathing and movements, and the ability to exert maximum power with minimal action. In this way, the mind will gradually become transparent. Initially, one must pick up the movements and sensations. As the five senses open, one will even need to recognize every blood vessel in one's own body. This stage will be very painful for the user. After memorizing and absorbing many things, one should shut down the unnecessary parts of the movements, leaving only what is necessary for the movement. Over time, the opening and closing of the muscles and blood vessels in the body will be as quick and simple as blinking. At that time, light will appear, and the path will open. Once the mind becomes transparent, one will begin to see a 'transparent world'..."

Is this how we achieve a 'transparent world'?

Urokodaki Sakonji murmured beside him, feeling as if a window had been opened on a road that had been blocked for many years.

"Once the 'Transparent World' is activated, everything becomes almost transparent to the eye. The speed of predicting movements and dodging attacks will be greatly enhanced. The contraction of one's muscles will be faster and clearer. One can also clearly see the rise and fall of the opponent's lungs and the flow and contraction of blood vessels, thereby seeing the opponent's movements and weaknesses clearly. In addition, once the 'Transparent World' is activated, one's 'battle aura' will also be hidden, and others will no longer be able to see one's own 'battle aura'..."

Tanjiro, standing nearby, also recalled the night his father had placed his hand on his shoulder, giving him a sense of entering another world. He finally understood that this was what was meant by the 'Transparent World'.

…………

Su Mu shared all the knowledge he knew about the Crimson Blade, the markings, and the Transparent World.

These seemingly simple pieces of knowledge are actually not easy to put into practice, and many people may never achieve them in their entire lives.

But that only applies to a portion of people. For some exceptionally talented individuals, once they find their direction, accomplishing all of this is not a problem.

At least for the 'pillars', apart from the 'Transparent World', although it is still difficult, it is not impossible to master.

The only thing to consider is that activating the 'spots' will put oneself in a critical state, which may also lead to a serious problem of shortened lifespan.

…………

The meal lasted a very long time, and even the wine jug was refilled several times by the kitchen staff.

After the event, Sakonji Urokodaki returned to his residence and wrote a letter. As the Kasugai Crow flapped its wings and flew by, the message about the Crimson Blade, the Demon Slayer Mark, and the Transparent World reached the Demon Slayer Corps headquarters.

……

When Kagaya Ubuyashiki received this news, he almost clenched his fists in excitement, and his usually calm face showed excitement.

Kagaya Ubuyashiki, who had been somewhat disheartened by the death of Shinjuro Rengoku, suddenly seemed to see hope in eradicating Muzan Kibutsuji.

Not long after, the ravens flapped their wings and flew off to various places again.

……

'Stone Pillar' Gyomei Himejima lowered his head, looking at the information about the Crimson Blade, the Mark, and the Transparent World. Almost the instant he saw the information about the Crimson Blade, he began to try it out. His hand gripped the hilt, and the powerful grip instantly made the blade blaze. Although the reddening blade was not visible, Gyomei Himejima could feel the temperature of the blade.

"Roar……"

A demon charged forward, and Beimingyu Xingming swung his sword. The scorching blade sliced ​​through the demon's arm faster and more smoothly than ever before. Moreover, one could feel the intense heat spreading across the demon's body as the blade struck it.

"Has the Crimson Blade become this powerful?"

With a low voice, after smashing the demon's head with a punch, Himejima Gyomei began to ponder how to activate the 'spots' and the 'transparent world'.

……

Kyojuro Rengoku, the "Flame Pillar," who was in Tokyo at the time, put down the letter in his hand and began to silently try out the "Crimson Blade," feeling the blade's temperature rise continuously.

……

Sanemi Shinazugawa, the 'Wind Pillar,' also quickly received the news and began to experiment as well.

……

蝴蝶屋

Kocho Kanae soon received messages from her sister and "Master" via Kasugai Raven, both about "Crimson Blade, Marks, and the Transparent World." However, compared to "Master," who had more knowledge about Crimson Blade, Marks, and the Transparent World, her sister mentioned a person named Su Mu more in her letter.

As the older sister, Kanae Kocho knows her younger sister almost inside and out. Even a single letter is enough for her to sense the changes in her sister.

She knows her sister too well.

Chapter 181 The Flower That Blooms Quietly

After writing the letter and having it delivered to her sister by a kasugai crow, Shinobu Kocho rested her chin on her hand, sat by the window, and stared blankly at the night sky.

When I'm thinking about the so-called 'Crimson Blade', 'Spots', and 'Transparent World', that tall figure inexplicably appears in my mind.

My first impression of him was extremely poor; I thought he was a petty person who talked badly about others behind their backs.

After spending a few days with him, I realized he wasn't too bad, but he liked to talk badly about others.

After failing to spar with the opponent, you feel that the opponent is probably someone with some skill, but still likes to talk badly about others.

After witnessing how Genya Shinazugawa found another path for demon hunting and how Tanjiro sensed a vague 'flaw', he felt that Genya was a very capable person with excellent judgment, perhaps with some minor flaws, such as giving people nicknames behind their backs.

Today, when she witnessed the other party mentioning the so-called 'Crimson Blade,' 'Marks,' and 'Transparent World,' things she had almost never heard of before, and such powerful things at that, she felt that the other party was truly amazing. Even her sister had never known these things, and even Urokodaki-senpai felt the same way. At this moment, she felt as if the other party was shrouded in a very mysterious veil, unable to see anything clearly, yet she really wanted to lift that veil to see what was inside.

Thinking this way, my curiosity grew even stronger. How did he know all of this? And why did he know so much?

This burgeoning desire to explore filled Shinobu's mind with images of the other person, making it almost impossible for her to fall asleep.

"Ren, it's time to rest."

Kamado Himawari spread out the bed and looked at Shinobu Kocho, who was still sitting by the window with her chin resting on her hand.

Shinobu Kocho also came to her senses, turned around and looked at the gentle woman, and then unconsciously asked, "How exactly did he meet you?"

Suddenly I really want to know something about the other person.

"Sir?"

The sunflower branch by the stove looked puzzled.

"Ah."

Shinobu Kocho crawled into bed.

There are many things that Kamado Aoi can't tell Kocho Shinobu about her master, because it involves the identity of the 'demon'. But aside from the identity of the 'demon', there are some things she can say.

So, on this night, Shinobu Kocho heard a lot about how Kamado Aoi saw Somu.

A description that is almost entirely without any flaws.

In this gentle woman's eyes, her husband seemed to be a very, very outstanding person.

A few days ago

Shinobu Kocho had heard many praises of that person from Aoi Kamado, but she had always scoffed at them. Now, however, she was beginning to believe them.

Perhaps, this person is truly extraordinary.

…………

蝴蝶屋

On such a quiet night

Kanae Butterfly stepped out of her room and saw that the light was still on in the room next door where people were healing. She gently pushed open the door and saw Mitsuri Kanroji, who was healing, secretly eating something.

Caught in public, Kanroji Mitsuri nervously hid the food behind her back.

"Mitsu, you've seen everything, so stop hiding it."

Kanae Butterfly has a soft, gentle voice.

Kanroji Mitsuri somewhat dejectedly carried a bowl of tempura out from behind her.

"No need for that. Having a big appetite is nothing to worry about; it's a very normal thing."

Kanae Butterfly stepped forward and gently patted Mitsuri Kanroji's shoulder.

"I still feel there's something not quite right."

Kanroji Mitsuri spoke somewhat sullenly, still vividly remembering the humiliating incident where her blind date mocked her for being a "big eater."