Konoha: Unable to learn ninjutsu, they had to develop their own.

Kitayama Osamu ran away.

"Without using the ultimate state, my strength should only be around the level of the first activity, but with the ultimate state, my power and speed should reach the level of the second activity."

Chiba sat in the hospital room and took out a pen and paper to summarize.

"you sure?"

Chiba's inner thoughts.

"If you knew you were wrong, you wouldn't have tried."

Chiba's lips twitched.

Kitayama looked at him with suspicion, then said irritably, "You dare to mess around in the mental realm? What if you hurt him?"

The bad news is -

These days happen to be the registration period for the Chunin Exams. If Kakashi doesn't wake up tomorrow, he might have to help Kakashi register.

but.

Next time, could it be me or Captain Yamato?

Then——

The cells surrounding the lungs are activated first.

"Cough cough, I know I was wrong."

Kitayama rolled his eyes.

This stimulus can come from within or from the outside.

The good news is that my mental ninjutsu is feasible, and its effects may far exceed expectations.

Chiba frowned.

Kakashi is clearly the latter this time.

The mountain tribe is the former.

Based on my own research into mental power cultivation, the key to increasing mental power is stimulation—

but.

"..."

Kakashi only created the most basic technique, and its effect probably didn't even reach the first level of Violet's activation. Its effect was only comparable to the activation of Lightning Release chakra.

Kitayama Osamu shuddered.

What kind of nonsense is this?

However, it has already reached the standard for practical application, and further testing can be conducted in actual combat.

"Teacher Kitayama, please continue with your work. Since Teacher Kakashi is not injured, he should wake up soon."

"Alright, I won't lecture you anymore. I just ask that you don't try any tricks on me in the future. My teacher is a bit different from your others; he can't take a beating."

In a few breaths, Chiba felt his blood rapidly flowing throughout his body, and in the blink of an eye, all the cells in his body entered an activated state.

Last time, Chiba sent Kai to the hospital, and this time it's Kakashi's turn.

His lung capacity is now at most twice what it used to be.

If the increase is increased to four or five times, the body will likely exhibit other changes, but how to achieve this remains to be seen.

Chiba scribbled on the paper, and a minute or two later, a portrait appeared on the paper.

Mouth, nose, and lungs.

What else can we breathe?

skin!

Chiba wrote it below.

Skin can breathe.

Even though its breathing volume is less than one percent of that of its lungs, the addition of chakra and the activation of its activity at least provide some oxygen intake.

Also.

He suddenly thought of something.

When it comes to breathing, who can compare to the Akimichi clan after mastering the Multiplying Technique? Shiro only managed to reach the third level of activity, which was limited by her lung capacity and oxygen content.

After the Akimichi clan multiplies, they don't need to worry about lung capacity at all.

"feasible."

Chiba muttered to herself.

This technique is highly versatile; anyone from Kage level to Genin can use it as long as they can learn it, without being limited by the ninja's specialty.

The masses are guaranteed a minimum standard, while Qiu Dao's family guarantees an maximum standard.

Its feedback mechanism must be incredibly powerful!

He quickly jotted down his speculations and conjectures about what would happen next in his notebook.

The first activity has been resolved.

The second activity involves adding an excessive state, increasing the oxygen content based on the first activity.

The third activity is further enhanced...

As for going further up, it might depend on the oxygen content. If we could use special air with a higher oxygen content, perhaps ordinary people would also have a chance.

Otherwise, only the Akimichi clan could master it.

of course.

There's a hidden concern here: oxygen toxicity. Therefore, the Seven-Day Breathing Technique differs from the Eight Gates Formation in another way—

The Eight Gates Formation can open six gates directly, but the Seven Heavens Calling Method probably cannot.

The third activity should be the limit for direct activation.

If the body is not allowed to gradually adapt to high oxygen levels and is directly activated at levels three or higher, it may lead to oxygen poisoning or even lung failure.

Thinking of this, Chiba stopped writing and took a closer look.

All that's left is to conduct experiments.

It's a pity Kakashi hasn't woken up yet, otherwise he could go and test Choza right now.

With nothing else to do, he started thinking about another idea—

Based on the concept of the chakra membrane, the internal and external chakra circulation is derived.

In normal circumstances, it is meaningless unless you can fuse it with the Chakra Absorption Technique.

However, in Sage Mode, using Sage Chakra instead might allow for a continuous internal and external circulation to absorb natural energy.

Even if the recovery speed can't keep up with the consumption, it can definitely extend its duration.

but.

In that case, the details of the technique still need to be optimized. Since we are in a combat state, there is no need to isolate our aura or block our senses. We can focus our energy on gathering natural energy.

Although not in "immortal mode," the process of gathering and absorbing nutrients through internal and external circulation can be tried in advance.

Chiba spent the entire afternoon pondering this thing.

When Kakashi wakes up...

He saw Chiba pacing to the side, his chakra aura never ceasing. Using his sensory abilities, Kakashi was even more shocked—

The natural energy around Chiba is very active. As long as you know how to perceive natural energy, you can sense it by calming your mind a little.

Moreover, the layer of chakra on Chiba's body seemed to be constantly absorbing natural energy from the outside world, forming an internal and external cycle with the internal chakra.

Kakashi quickly understood the significance of this research.

Maintaining the chakra layer consumes chakra.

but.

In return, it gained natural energy and Sage Chakra.

What the hell?

Have I been in a coma for many days?

Kakashi was bewildered.

"Kakashi-sensei, you're awake? How are you feeling? Are you feeling better?"

"There's nothing wrong. Actually, you controlled your attack very well and didn't hurt me much. I think I fainted because I used too much of my eye power and suffered a backlash."

Kakashi covered his eyes and couldn't help but sigh, "Being outside the Uchiha clan doesn't necessarily mean that obtaining the Sharingan is a good thing."

Chiba pondered for a moment.

Kakashi still hadn't discovered the secret of the Mangekyou Sharingan, and thought that his coma was caused by his non-Uchiha clan identity and a lack of harmony between his eyes.

How should I remind them?

After much deliberation, he did not voice his conjecture about the "kaleidoscope" at that moment.

Saying this now would be too targeted.

"Shall we be discharged now?"

"Oh, by the way, how much did it cost?"

"I'm a member of the medical team, so it won't cost much to use the inside channels. Come on, let me treat you to a meal as an apology."

Chiba did not answer directly.

He wouldn't even look at that little bit of money, and although Kakashi's coma wasn't mainly caused by him, the mental stimulation he received was the trigger.

and.

He had some questions he wanted to ask Kakashi, such as...

Lightning Armor.