Nagato's condition was dire. Even with Hikari's healing orbs, he only barely recovered the use of his legs, allowing him to stand again.

The first round of healing hadn't been very effective—aside from his legs, Nagato's skeletal frame showed little improvement.

Left with no choice, Kaito had Hikari increase the output, spitting out more orbs while he muttered complaints at Nagato.

The entire time, the blinding light from the "left and right guardians" never let up.

It got so bad that Nagato almost snapped and cursed at him.

If not for the fact that Uchiha Kaito was kindly treating him, he would've grabbed the kid by the collar, pointed at his drenched hair, and given him a piece of his mind.

Not only that—under the intense light, Nagato even started hallucinating that he was going blind.

Half an hour later...

"Done."

Kaito clapped his hands as if dusting them off, then casually removed his sunglasses. The once-skeletal Nagato now looked like a patient fresh out of ICU—still on the verge of death, but at least Kaito no longer feared he'd keel over any second.

Seeing this, Kaito smiled genuinely.

Or, to put it in simpler terms...In the past, Nagato's excessive use of the Samsara Eye came at the cost of reducing his life expectancy. However, under Kaito's treatment, Nagato's life expectancy had fully recovered to 100%.

Regaining his health should have been a joyous occasion, but after enduring a series of "ordeals," Nagato currently...

Couldn't muster even a shred of happiness.

Moreover.

He could feel the Samsara Eye's relentless drain, squeezing every last drop of Chakra from his body.

This state was only temporary, though.

Nagato lowered his head to examine his condition, then raised a hand to wipe his damp face before flicking the moisture away with visible disgust. Muttering in a nasal tone, he said, "Maybe we should just forget it."

He knew that to fully recover, he would have to undergo treatment every day.

But recalling the less-than-pleasant experience he'd just endured, Nagato felt that living a few years shorter might not be so hard to accept after all.

As a god... being sprayed with saliva by two sunflowers for a full half-hour...

Was somewhat damaging to his divine dignity.

"So it can't be fully cured..."

Hearing Nagato's words, Kaito immediately grasped the issue and murmured under his breath.

Then, he pulled out a sheepskin scroll along with a self-written manual titled Cultivation of Immortality: Beginner's Guide and placed both in front of Nagato.

"Fair enough, I really can't come to treat you every day either."

"Try seeing if you can master this instead."

To be honest...

It wasn't that Kaito didn't want to practice this technique—it was just that the entire thing was written in classical prose. Though the text wasn't long, reading through it left him with only one impression...

After finishing, he felt like he understood something, yet also like he understood nothing at all.

Compared to his previous, heavily flawed First Set of Elementary Foundation Establishment Techniques, Kaito suddenly felt that the techniques provided by the system were far superior.

When it came to ancient cultivation manuals, Kaito could only admit his comprehension wasn't up to par.

As for Nagato practicing Cultivation of Immortality...

He didn't hold much hope—this was more of an experiment than anything else.

"Thank you." Nagato stared at the precious secret techniques before him and expressed his gratitude to Kaito with utmost sincerity.

"Everything you've done... I won't forget it."

The Sage Arts Kaito had presented were clearly invaluable treasures. Knowing he had no way to repay him, Nagato refrained from empty promises and instead silently vowed to protect the Uchiha clan.

"Start practicing first." Kaito instructed, raising a hand as if to pat Nagato's shoulder in encouragement. But considering Nagato's frail constitution, he opted to pat Pain's shoulder instead before turning to walk toward the door.

"Oh, and I might be in seclusion for quite a while..."

"Understood. I'll keep an eye on the masked man for you."

The two had an agreement. Since neither fully trusted the other, Kaito hadn't revealed Obito's identity, and Nagato had only warned Kaito to be wary of the masked man.

Yet, both had tacitly chosen to avoid that masked man as much as possible.

Nagato didn't trust him, fearing he might turn Kaito or the rest of the Uchiha clan against him.

Meanwhile, Kaito was worried that his great-grandmother, with her naive nature, might fall prey to Black Zetsu's schemes—especially if he teamed up with Obito...

Given her innocence, she could easily suffer a major loss.

After resolving his patient Nagato's issues, the Saint of Medicine stuffed his hands into his pockets and strolled home, his gaze repeatedly lingering on the system interface's [Seclusion] option.

Completing seclusion would grant him peak Foundation Establishment strength.

But then the question arose...After the Foundation Establishment Stage, wouldn't he need to find cultivation techniques that match his previous style?

For example... The 18th Set of Middle School Golden Core Techniques, or Three Years of Tribulation, Five Years of Ascension?

Hiss—

At this thought, Kaito suddenly sucked in a sharp breath, hugged his shoulders, and shivered for no reason.

For a moment, it felt like he had returned to his student days in his past life, once again experiencing the terror of being ruled by homework and exams.

It was at this moment, with his thoughts wandering, that Kaito abruptly stopped in his tracks, as if a lightbulb had lit up above his head.

Snap!

He clapped his hands together with a crisp sound and began muttering to himself.

"Doesn't Amegakure lack schools?"

"And the Secret Realm doesn't have any either!"

Since they wanted to cultivate immortality, sticking to the traditional sect-style cultivation from novels would be too outdated. Why not replicate the elementary, middle, and high school model from his past life for teaching?

This way, they could not only test the compatibility of cultivation techniques with people from the Shinobi World but also elevate everyone's overall strength.

Who knows—maybe in a decade or so, once everyone thoroughly understood the techniques in their hands, they could independently develop even stronger ones...

The more Kaito thought about it, the more feasible the idea seemed.

The Ten-Tails God Tree? The Ōtsutsuki Clan?

Sorry, but the era of shinobi was about to end.

As for whether the underage children of the Uchiha Clan and Amegakure would have complaints...

He didn't think so.

After all, wasn't learning just learning? If they could master ninjutsu just fine, there was no reason they'd be full of resentment over cultivation.

With these thoughts in mind, Kaito headed to the Secret Realm and casually instructed Shisui to pay special attention to all recorded materials—books, scrolls, jade slips, anything with written records.

When Shisui heard Kaito's plan to build a school, his smile didn't fade for a second, and he thumped his chest with a booming promise to keep an eye out.

After this, Shisui suddenly felt that Kaito was starting to act normal again.

At the very least, the kid wasn't constantly thinking about destroying the world...

"I'm back."

By the time Kaito returned home, it was already around eight o'clock.

Inside, Uchiha Hikari was sprawled on the couch, munching on snacks while watching TV, while Sasuke was still fast asleep in bed—probably because he hadn't cleared Tsukuyomi yet.

"I cleared out a room for you."

Hikari mumbled through a mouthful of snacks, then pointed to a corner.

"Get yourself settled, then head to the basement. I'll bring you anything you need."

Kaito: ?

The basement???

Noticing something strange in her words, Kaito suddenly looked at his great-grandmother on the couch with horror, stammering after a long pause.

"Ancestor... y-you... you're not a yandere, right?"

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