Demon Slayer: Muzan, will you dance too?

Neither the Breath of the Wind nor the Breath of the Serpent can instantly increase a user's lung capacity several times over.

For Yu Zhu, blowing up the giant gourd was just the beginning.

Their lung capacity is several times that of ordinary people. Even Kiyokawa Izumi, who is slightly inferior, probably has more than twice the lung capacity of ordinary people.

These are not achieved instantly through breathing techniques, but rather through diligent and rigorous training, gradually improving one's abilities.

It was precisely because of these common-sense observations that Sanemi and Obanai felt that Kiyokawa Izumi was not quite lucid and must have injured her head, otherwise why would she say such nonsense?

Imagine, Pillar's lung capacity is already far beyond that of ordinary people. If he could instantly increase it to four times his normal capacity, the boost to his strength would be considerable.

Even if it can't compare to the improvement brought by awakened markings, there won't be a qualitative difference—most importantly, there are no side effects from awakened markings, so you won't die before the age of twenty-five.

Of course, a fourfold increase is just the upper limit; even Kiyokawa Izumi himself couldn't achieve it.

When fighting against Yu Hu, my lung capacity increased by a little over two times, definitely not three or four times.

Of course, he was just a user, not a creator.

There are some principles that I don't even understand myself.

Whether it's activating the whole body or increasing muscle density, these both require further detailed research.

Furthermore, since this taijutsu essentially relies on breathing to enhance oneself, it doesn't require much chakra; whether or not one has chakra only determines the upper limit.

Bows and arrows made from ordinary bamboo are certainly far inferior to the composite bows of later generations, but that does not mean that bamboo bows are unusable.

It might not be as effortless, and the shot might not go as far.

In a world where breathing techniques are paramount, the seven-day breathing method is certainly of great reference value.

Kiyokawa Izumi had no intention of hiding it and was willing to share it with the Demon Slayer Corps.

The only thing to note is that it cannot be used simultaneously with your own breathing technique—after all, they are two completely different breathing rhythms.

There will definitely be some gains, but it's hard to say how much.

Even Kiyokawa Izumi himself had to spend a very long time combining the two.

Although his basic abilities have improved significantly after using the Seven-Day Breathing Technique, he can only use a very limited number of skills. He cannot use the Fourth Form of Dark Breathing with just the Sharingan.

It will definitely become much stronger in a short period of time.

Correspondingly, the upper limit will also be reduced significantly.

After he finished explaining in detail, Sanemi, with his brows furrowed, did not immediately refute him, but instead seriously considered whether it was feasible.

"A new breathing method? It doesn't resemble the five basic breathing methods at all. How did you create it?"

Sanemi finally understood why this guy's strength had increased so much.

But I was still very puzzled, because this breathing method was completely different from the five existing basic breathing methods, and had very few similarities.

"It seems you can still be of some use, but unfortunately, you don't match my breathing technique."

Obanai Iguro spoke indifferently, his face showing no sign of regret—the Snake Breathing technique is a high-difficulty breathing method that is purely a matter of skill, and it doesn't quite match the Seven Days Breathing technique.

"Cough cough—"

"Could you two please not disturb the injured person's rest?"

A familiar voice suddenly rang out, and it was Shinobu Kocho, who had appeared out of nowhere, looking at everyone with a smile.

He expressed strong dissatisfaction with the Wind Pillar and the Serpent Pillar.

They have been here for a long time.

This has seriously affected the injured's rest.

Even Shinobu Kocho couldn't stand it anymore.

"Let's leave it at that for now!"

Sanemi, who still had questions to ask, could only keep them to himself and silently got up to leave.

"Recover quickly, and don't even think about quitting, understand?"

"That's asking too much. Shouldn't I at least have two or three months to recover?"

Looking at the still sharp-tongued Obanai Iguro, Izumi Kiyokawa could only manage a wry smile.

What's with that "fight to the death" look on your face?

No way!

"Mr. Kiyokawa Izumi, aren't you afraid that talking so much will affect the healing of your wound and leave lasting complications?"

Seeing Shinobu Kocho sitting down to the side, Kiyokawa Izumi didn't ask why she was there, but instead thought of a very embarrassing question.

I feel like I need to go to the toilet, what should I do?

Can you help me up?

Or maybe we should hold it in a little longer.

But how can you keep something like this to yourself?

"Excuse me, could you help me up?"

"Mr. Kiyokawa Izumi, do you know how many of your ribs are broken? Not only today, but tomorrow, the day after tomorrow, and for a long time afterward, you will not be able to move normally."

"The lord's orders have arrived; you must remain here to recuperate until you have fully recovered."

On his fair forehead, the veins throbbed involuntarily.

Why is this guy so disobedient?

Don't you know how serious your injury is?

Can't you take better care of your body?

"But……"

"No buts!"

Shinobu Kocho interrupted, trying to maintain a smile.

"But I need to go to the toilet!!"

"..."

Seeing Shinobu Kocho suddenly speechless, Izumi Kiyokawa asked helplessly, "I can't just relieve myself here... I'm a bit of a germaphobe. How about we call a male member? I really, really can't hold it in any longer!"