Chichi chichi—!
Suddenly, a familiar sound came from behind.
Kakashi turned his head, revealing an expression of disbelief.
Lightning shone in Aoki Yoru's hand; it was remarkably his signature technique—the Lightning Cutter.
At this moment, the lightning in Aoki's hand dissipated.
"No, it still needs to be compressed further and made more refined." Aoki Yoru formed hand seals again.
"He can actually perform it after seeing it just once!"
Kakashi's eyes were full of wonder. One must know that it took him nearly half a year to develop the Lightning Cutter, and even among the Uchiha, he had never seen anyone learn it just by watching.
Huu—
He slowly let out a breath.
Kakashi regained his lazy demeanor, leaped onto a tree trunk, and took out icha icha paradise to continue "studying."
On the training ground, Aoki Yoru performed the Lightning Cutter over and over again.
The speed of his progress made Kakashi's eyelids twitch as he watched from the shadows; it looked like he would master it in no time.
Evening.
Chichi—
An exhausted Aoki Yoru pushed open the old door to his home.
After entering, he slumped directly onto the sofa. Although physically and mentally exhausted, his face was covered in smiles.
Today, he hadn't just learned the Lightning Cutter from Kakashi, but had also "milked" several Ninjutsu of Lightning, Water, and Earth attributes.
Now, he was incredibly grateful that his team leader was Kakashi. Even compared to other Elite Jonin in Konoha, none were as well-rounded as Kakashi.
In Konoha, the only one more well-rounded than Kakashi was Jiraiya, who was traveling abroad.
When Aoki Yoru first transmigrated, he had fantasized about becoming his disciple. Later, after understanding Konoha's ecosystem, he cut off that thought; there was simply no way for their paths to cross.
Lucky ones like Minato Namikaze, who were scouted while still in the Ninja Academy, were a minority after all.
After wolfing down some food.
Aoki Yoru sat cross-legged on the bed and continued to meditate, sensing Natural Energy.
This was a life-saving trump card; he couldn't stop.
Through continuous cultivation and adjusting the ratio of physical energy, spiritual energy, and Natural Energy, the amount of Natural Energy he could contain increased.
Aoki Yoru could feel his body gradually adapting, but this process would take a long time. Thinking about the Fourth Great Ninja War that would break out in a few years, Aoki Yoru suddenly felt a bit anxious.
Suddenly, he opened his eyes, the corners of his mouth curving upward into a smile.
Today's cultivation suddenly gave him inspiration; he no longer obsessed over drawing Natural Energy into his body.
Slowly, he used his spiritual power to condense the Natural Energy in the air bit by bit, gradually gathering it together.
"Jie jie jie..."
"It can work!!!"
Aoki Yoru let out a hair-raising laugh: "I really am a genius."
He gave himself a thumbs-up for his wit. Although it dissipated right after forming, he felt his idea could work.
Composing himself, he continued to condense.
Forming—dissipating—forming—dissipating again.
And so it repeated.
The time it stayed formed gradually increased, and Aoki Yoru went a step further, slowly compressing it into threads.
Five days later, Konoha Training Ground 6.
Aoki Yoru and Kenta were training individually, while Yui had been arranged by Kakashi to study at the hospital.
This was the benefit of having a powerful teacher; their connections were truly extensive.
Bang... Bang...
Two figures fell from the sky, crashing heavily onto the ground and kicking up clouds of dust.
"My dear eternal rival! It's a draw again, but I won't give up. Youth is about constantly surpassing oneself! Next time, I will defeat you fair and square!!"
The bowl-cut-haired man in the field turned around, gave a thumbs-up, and flashed his pearly white teeth, which glinted in the sunlight.
"Are you Kakashi's beloved disciples? I didn't expect Kakashi to actually ask me to help with your guidance. This is youth!!!"
Kakashi patted the dust off his clothes and said, "Then I'll leave it to you, Guy."
Looking at the hot-blooded, tearful Guy in the field, Aoki Yoru's mouth couldn't help but twitch.
Although he had seen it in the anime, seeing it in reality was truly... hot-blooded.
Kakashi ignored Guy's self-indulgent emotion and introduced him to the two: "This is Might Guy, a Jonin and Konoha's top Taijutsu expert. Kenta, you will be studying under him for a while."
"Yes, Kakashi-sensei," Kenta nodded seriously in response. He was very moved that his teacher had found a Taijutsu instructor for him.
'He's really putting in a lot of effort. Kenta is clearly more suited for Taijutsu. Being able to study under Might Guy is a precious opportunity for him.' Aoki Yoru shot Kakashi a surprised look.
Might Guy stepped forward, sized him up, squeezed his body all over, and nodded.
"Mm-hmm!!!"
"This strong physique is indeed good material for Taijutsu. Since Kakashi has entrusted you to me, I will train you into a world-class Taijutsu powerhouse. Now, run 50 laps around Konoha with me! Youth allows no slack!!"
Bang...
After saying that, he dashed out, leaving a trail of dust. Kenta immediately followed.
Aoki watched the swift and decisive Guy speechlessly.
He stepped forward. "Kakashi-sensei, the Lightning Cutter is too violent and hard to control. I was wondering if I could change its nature and flow to make it more stable and easier to manage, and even enhance its attack range."
What Aoki Yoru was talking about was exactly the Purple Lightning that Kakashi mastered during the Boruto era.
Kakashi wasn't surprised by his whimsical ideas.
He pondered for a moment.
He nodded. "Theoretically feasible. I'll try it out first."
The next day.
'Hey, hey, hey! How did you become a Super Saiyan? Are you going to space to fight Frieza?'
With lines of frustration on his forehead, Aoki Yoru watched Kakashi, whose body was wrapped in Purple Lightning, his white hair standing straight up.
"It would look even more like it if his hair were yellow," he couldn't help but grumble internally.
He hadn't expected Kakashi to figure out the Purple Lightning he mentioned yesterday in just one day, even combining it with Kumogakure's Lightning Style Chakra Mode.
But then again, his talent was top-tier to begin with; he had just suffered repeated blows and lost his spirit, which was why his strength had stagnated.
As long as you gave him an idea, he could make it happen.
After a while, Kakashi dispersed the Chakra.
"This mode consumes quite a bit of Chakra. For me, it's only suitable for short-term combat."
The Sharingan's drain on his Chakra was too great; the remaining Chakra would bottom out after only a few big moves.
Then, he explained the principles and tricks to him.
Mm-hmm, mm-hmm!
Aoki Yoru nodded from time to time.
Some of the small tricks were indeed very beneficial; he would have taken many detours if he had to figure them out on his own.
Then, Kakashi's expression turned serious as he solemnly handed him a scroll.
Aoki Yoru opened it curiously, wondering what Ninjutsu could be so serious.
Huu—
His pupils constricted, his whole body suddenly froze, and his breathing became much heavier.
White Fang Sword Technique!
"Kakashi-sensei, this is too precious. This is your Hatake Clan's secret technique!"
"There's no rule that it must be kept within the family. The true meaning of a sword technique is to be inherited, used, and to protect what is important."
Kakashi looked at him calmly, his eyes gentle as he said, "This sword technique became famous throughout the Ninja World in my father's hands. I hope you won't let it fade away, but rather bring it to greater glory."
Aoki Yoru solemnly put it away and bowed to Kakashi. "I won't let it fade away."
Kakashi nodded and then vanished from the training ground.