Above Konoha, a messenger hawk flew in from afar and finally landed at the Communication Department... Achoo!
Kakashi wiped his nose again.
"Emergency mission. A letter from the Hidden Sand Village says the Kazekage has been captured by the Akatsuki Organization."
"They are requesting support from Konoha. Besides Satoru, you are..."
"...the only person in Konoha who has had contact with the Akatsuki Organization."
"I want you to lead Team Kakashi now to support the Hidden Sand Village and rescue the Kazekage."
Tsunade's expression was grave; she didn't care whether Kakashi had a cold or not.
"Yes, I understand. But Naruto..." Kakashi wanted to say more.
"Akatsuki's target is Naruto. We can't protect him forever."
"He needs to grow now."
Tsunade had her own thoughts.
"Understood."
"Now, move out immediately."
...Satoru received Tsunade's order to pay attention to the security of Konoha.
The Kazekage of the Hidden Sand Village was captured.
"Dad, what's wrong?" Keigo was tapping away at a suit of armor.
He had four long tentacles on his body and was wearing sunglasses.
The tentacles would occasionally extend tools like drills, tweezers, and blowtorches.
Clang! Clang!
"It's nothing, just that the Hidden Sand Village was attacked. Now Hokage-sama wants me to look after Konoha's security!"
"How's that? Isn't your dad's Ninjutsu convenient?"
"It'll definitely let you experience the charm of Ninjutsu in advance."
Satoru looked at the various tools on him.
They were all instruments he had constructed using the Pupil Setting Hand based on his own knowledge.
There was a Linked Ninjutsu connecting to Keigo's nerves.
Not only did it reduce the neural pressure on Keigo, but the Chakra was also being output by him, the master of the Pupil Setting Hand.
"Awesome! Dad, how did you think of this? This way, even if I haven't learned to refine Chakra yet..."
"...I can still perform various operations!"
Keigo was full of praise for Satoru's work this time.
This made Satoru raise his head proudly; he had finally gotten some positive feedback from the kid.
"But Dad, where did you get these Scientific Ninja Tools and all this data?"
Keigo asked in confusion.
From the age of one, he began reading books extensively, and by two, he had read most of the research books in the Konoha Library.
At three years old, he already had a general understanding of the non-secret research held by Konoha.
According to the bucket theory, in a prosperous community, the place where knowledge is most common reveals the community's maximum limits.
Even if Konoha had secret research, it would be impossible to obtain so much research data from the library's records.
This knowledge simply exceeded what Konoha should possess.
Keigo was very puzzled regarding the Scientific Ninja Tools.
"Heh, your dad is a Ninja who has traveled through dozens of large and small countries in the Ninja World."
"What's wrong with spying out some useful intelligence?"
"There's no need to doubt your dad's professional qualities as a Ninja."
Satoru said proudly.
The armor was from the Land of Snow, and the research data was the result of many countries.
Some of it even included results from the Artisan Village.
Since Keigo had talent in this area, he naturally had to start nurturing it now.
Once the Fourth War began, he could have his son help with the collected Hashirama cells, Madara's cells, tissues from the nine Tailed Beasts, the Ten-Tails, and the body tissues of Kaguya and the like.
After all, for his Forced Evolution, he had to have in-depth research on the functions of those tissues to find a suitable direction for his own evolution.
Only then could he perform information deception to make his body develop in that direction.
Doing it recklessly might lead to gene compilation errors, which would be troublesome.
Researching on his own was too troublesome, and there weren't many trustworthy people; it would be great if his son could grow into an asset for him.
"If you stole it, just say you stole it. What 'Ninja's professional qualities'? Dad, you're so hypocritical."
Keigo said disdainfully.
But his eyes betrayed him; he was filled with a thirst for knowledge regarding the armor in front of him and the data his dad provided.
"You haven't taken Ninja courses yet, so of course you don't understand."
"I won't talk about that with you. I just want to ask..."
"...you've read so many books, if there were an enemy technique..."
"...that could counterattack anyone who harbored killing intent toward them, where the stronger the killing intent, the higher the attack power..."
"...and it was a passive ability, how would you solve it?"
Satoru watched his son disassemble the armor bit by bit and suddenly posed a question.
He had thought for a long time about how to crack this mechanism when 'Shinjutsu can determine that actions are also killing intent,' but he still hadn't found a solution.
The only direction was that the Shinjutsu's determination of subjective killing intent was based on the soul fluctuations of intelligent beings.
Rather than being determined by the biological actions as well.
This was quite passive; he could only hope that the opponent's Shinjutsu wasn't that outrageous.
That wasn't what he wanted.
"Dad, how could there be such a terrifying Ninjutsu in the world?"
"You don't have a fever, do you?" Keigo paused his mechanical operations and complained.
What kind of hellish Ninjutsu is that? With this kind of determination method, is there any need for other Ninjas to exist?
"What if it really exists?"
Satoru continued.
Seeing his dad so firm, Keigo gave him another look.
Could Dad have encountered such an enemy?
Then he really fell into thought; the rules of scientific research state that existence is reasonable.
If such an enemy really existed, how would he, a three-year-old child, solve it?
"I would probably try to popularize television among the people of every country, and then at a certain moment..."
"...expose the threat he poses to the people simultaneously, making everyone in the world harbor killing intent toward him."
"That way, even if he's a very strong Ninja, his Chakra would be drained, right?"
Keigo thought for a quarter of an hour and came up with a mutual destruction method.
Because when he did the corresponding things to deal with that kind of enemy, he would definitely be targeted by the opponent's Ninjutsu and eventually die.
And the people who harbored killing intent toward that person would also die.
Whether killing intent is determined by the soul or by actions, it's all very strong killing intent.
This was the only solution he could come up with.
"Are there any other better ideas?" Satoru's eyes lit up upon hearing this.
As expected of his son, he was indeed clever.
He thought of a mutual destruction method so quickly.
"Dad... I'm just a three-year-old child. How could I think of the answer to such a complex problem?" Keigo was annoyed; the question was lingering in his mind, interrupting his research.
He couldn't shake it off, and for someone with a strong desire for knowledge, it was too fascinating.
"What's wrong with being a three-year-old? Haven't you heard that the younger you are, the closer you are to the source of the world?"
"Maybe you'll have some inspiration. I don't care; research is research, but you must help Dad think about it."
Satoru retorted.
"You should let my older brother and sister help you think too."
"Them? They have some brains, but not much; they're not cut out for it."
"You're finished, Dad. I'm going to tell Mom that you complained about my brother and sister having no brains."
"Don't talk nonsense."
"Then be more serious and make some more tools suitable for my research."