Demon Slayer: Muzan, will you dance too?

In Kiyokawa Izumi's eyes, the Nine Pillars were simply superhuman.

This idea became even more firmly established after he obtained the gourd.

As a time traveler, he naturally knew the concept of "Complete Collection - Regular Collection".

He also roughly remembered how to train.

Now that he has made up his mind, he won't just think about it without taking action.

Strenuous exercise is obviously not advisable while the injury has not yet healed.

So he could only ask the three little ones to help him get a gourd.

When two fist-sized gourds appeared in front of him, Kiyokawa Izumi confidently accepted them.

He felt that he could blow up such a small gourd—after all, he was a man who had created his own breathing technique and pushed it to LV2, so a small gourd was easy for him to handle.

But the reality is cruel.

Even with his face flushed red, he still couldn't blow the gourd apart.

The three little ones stood by his bedside, staring wide-eyed.

Kiyokawa Izumi didn't feel ashamed. None of the attributes of this body were outstanding. The only thing worth mentioning was its solid foundation.

"It's not as amazing as I'd like to say..."

"Kanao-neechan can already blow this big gourd apart."

The three children whispered to each other, and one of them couldn't help but gesture.

"..."

"Blowing the gourd is a core training method for mastering total concentration and constant balance. The basic principle is that it strengthens lung capacity, increases oxygen intake, more efficiently activates the body's potential, accelerates blood circulation, and significantly improves physical fitness."

"But isn't blowing up a gourd a bit of an exaggeration?"

Are the Nine Pillars even human?

The average person's lung capacity is between 3500 and 4000 milliliters.

The number of athletes is likely to reach 6000-7000.

The previous world record was 15000 milliliters.

Kiyokawa Izumi felt that his lung capacity should be at the level of an excellent athlete—but even so, it was not enough to blow the gourd apart.

Not to mention the giant gourd that's as tall as three little ones.

Recalling Tanjiro's training, after rigorous training, he was able to blow the small gourd apart in one breath.

Back then, his lung capacity must have been three times that of an average person, right?

They're monsters!

No wonder these pillars can fight against the Upper Moons; their physical abilities must have long exceeded their physiological limits.

"I'll keep this gourd for now."

Kiyokawa Izumi smiled and said to the three little ones, "I didn't back down just because I thought it was difficult."

How will you know if you don't try?

"Uh-huh!"

"no problem!"

The three little ones nodded repeatedly.

I can't tell!

I really can't tell the difference!

These three little ones look almost identical and are dressed in the same clothes. Kiyokawa Izumi has some face blindness and really can't tell them apart.

Scratching his head, Kiyokawa Izumi straightened his posture and asked seriously.

"Are you Kiyoshi (Terauchi Kiyoshi)?"

The little one on the right has pigtails and wears a light blue bow.

The three of them shook their heads repeatedly.

"Koho (Naho Takada)?"

He shook his head again.

"..."

Faced with a choice of three, Kiyokawa Izumi guessed wrong twice in a row.

It's not his fault.

Because he hadn't really paid much attention to these things before.

It took him about five minutes to roughly distinguish them.

His method of memorizing was also very simple—the one wearing the pink bow was Terauchi Kiyoshi (Kiyoshi), the one wearing the light blue bow was Nakahara Sumi (Sumi), and the one wearing the light green bow was Takada Naho (Sui).

After much effort, I finally managed to remember them.

"How about this?"

The little ones took off their ribbons, circled around his hospital bed, and after a moment stood in a row again, staring at him with their beady eyes.

"?"

Without the help of a bow to aid her memory, Kiyokawa Izumi's lips twitched slightly, and she could only begin to guess blindly.

"Xiao Qing?"

Shake his head.

"Xiao Cheng... no, it's Xiao Sui?"

Kiyokawa Izumi is just missing the Sharingan to help him remember things.

After playing with the little ones for a while, Kiyokawa Izumi looked at the gourd by the bed and, having nothing else to do, could only continue blowing on the gourd.

Blow, blow!

The gourd didn't react at all!

Kiyokawa Izumi also refused to blow in segments—inhaling in segments and blowing out multiple times would reduce the difficulty a lot, but this method is a bit of a shortcut.

When a burst of power is needed in actual combat, the demon won't give him time to breathe in stages.

When he experienced significant discomfort in his lungs, Kiyokawa Izumi put down the gourd, knowing the principle that too much of a good thing can be bad.

Breathing training is different from swordsmanship; there are no shortcuts—swordsmanship skills can be learned quickly with these eyes.

But when it comes to lung capacity, if you can't do it, you can't do it.

Recalling my past life, I've never heard of any way to quickly increase lung capacity.

Perhaps because he was so bored, Kiyokawa Izumi had begun to think about whether he should change his name.

"System, my current name is Uchiha Tree Spirit. I am the only Uchiha in this world."

"So, it's reasonable for me to be the clan leader, isn't it?"

'Would you call this a comeback?'

Since the idiot system isn't very smart anyway, I might as well consider whether I can trick it into giving me some rewards.

If the stripped-down Sharingan could be upgraded, well, even without chakra, it would be considered a bug-level ability in this world, right?