Demon Slayer: Muzan, will you dance too?

Kiyokawa Izumi knew that his request was somewhat unreasonable; he could not provide the blood of the Marked Swordsman for this person to conduct research.

Ultimately, he himself didn't understand the principle behind the markings.

The conditions for activating the mark are somewhat speculated, and it is unknown whether it is due to a lack of talent or a lack of willpower, but the mark could not be activated despite several desperate situations.

Developing patterns should be much simpler than achieving transparency, but he just couldn't do it.

I've also asked myself deep down whether it's because I'm afraid of the side effects of the freckles.

Do you have a deep fear of not living past the age of twenty-five?

Because of this concern, I have never been able to activate the markings.

But then I thought about it again and realized that wasn't right.

Having traversed this long, I've had my share of struggles on the brink of life and death.

He wasn't actually that afraid of death, and he believed he could face death calmly.

"Such a significant boost can be achieved by overdrawing one's life force? Why is there such a vast difference between those who awaken their potential innately and those who awaken it later?"

"Could it be true, as some people speculate, that the markings are actually a virus, and the reason I can't awaken is because I haven't been infected with it yet?"

What makes Yoriichi Tsugikuni, who was born with birthmarks, so special compared to ordinary people?

Superior physical abilities? A talent surpassing that of others?

As his strength increased, Kiyokawa Izumi gradually realized that the so-called bottleneck was a real thing.

Even if he possessed the so-called three-piece set, the strength he displayed would still be far inferior to Yoriichi Tsugikuni.

Both his breathing techniques and swordsmanship have reached their current limits.

As long as it remains within the realm of humanity, this bottleneck cannot be easily broken.

Even though the third brother had been a demon for hundreds of years, he still failed to reach the highest realm.

Compared to his human days, Kokushibo has lived for hundreds of years. How much has his swordsmanship and breathing techniques improved?

Putting aside the Blood Demon Arts and powerful physical abilities, has there truly been a qualitative improvement in mindset and skills compared to the human era?

Those who explore the ultimate path will arrive at the same destination, regardless of their specific routes.

Whenever he thought of those words, Kiyokawa Izumi couldn't help but want to complain. What gave that guy such confidence in people of the future? Not everyone can reach the same level as him.

"You seem a little down?"

Seeing that Kiyokawa Izumi remained silent for a long time, Ms. Tamayo couldn't help but ask, "Is it because the side effects of the marks are causing you a lot of distress?"

"No, it's just that I feel there's no way forward, no one to refer to or learn from."

What a pity I never got to meet or get to know that person.

The emotions she expressed were beyond Tamayo's comprehension.

It's just a pity we couldn't meet, that's all.

"The Demon Slayer Corps also has swordsmen who are skilled in medicine and can create poisons that can kill demons."

"May I ask if I may copy down the results of your centuries of research and take them with me?"

Kiyokawa Izumi felt that his request was somewhat presumptuous and impolite, but he still asked it anyway.

"Um?"

Miss Tamayo was slightly taken aback, seemingly not expecting him to make such a request.

He hesitated slightly before replying, "That's possible, but...aren't you in a hurry to return to the Demon Slayer Corps?"

Seeing that Qingchuanquan was puzzled.

Tamayo slowly got up and walked into the study. She reappeared, carrying a notebook that was almost half her height, and said in a gentle tone.

"This is the research and record from the past decade; there's much more in the room."

Hesitation is not necessarily a sign of unwillingness.

I just don't think Kiyokawa Izumi can finish copying it in a short time.

Kiyokawa Izumi underestimated this man's efforts over hundreds of years—ghosts are different from humans; they don't need to spend a third of their time sleeping.

This means that Tamayo had ample time to read professional books, learn professional knowledge, and research drugs that could work against evil spirits.

This person is also quite talented; otherwise, Muzan wouldn't have chosen him and forcibly taken him under his wing.

Having no shortage of talent, time, and unwavering will, such a being is undoubtedly terrifying—and all of this was caused by Muzan himself.

Even Shinobu, who is equally skilled in medicine, is somewhat inferior to this person.

One study takes a decade or so, the other a century; can they be compared?

Kiyokawa Izumi gently flipped through this person's records, her movements not rough, but rather very careful.

The handwriting is very neat, but it is somewhat difficult to understand.

Kiyokawa Izumi, who wasn't very good at these things, couldn't understand what this person was writing. Some of the technical terms might require the help of books to understand their meaning.

Kiyokawa Izumi, who was already drenched in sweat after reading just one page, silently closed the notebook and pushed it back in front of Tamayo.

I inexplicably felt that my knowledge was being crushed.

Well, he wasn't in this major before he time-traveled.

It's normal if you don't understand it.

"You can take all of these with you. I need to organize the rest and will be able to send them to you later."

Tamayo smiled gently.

"Is this really okay?"

"It doesn't matter, these are my weapons, just like your Nichirin Blade... Mr. Kiyokawa Izumi, would you forget how to swing a sword if you didn't have one?"