After hearing Tsunade's explanation, Jiraiya was completely dumbfounded.
The Uzumaki clan has a Public belief? I've never heard of that.
"What exactly is this Sage Body Public belief? Is it something unique to the Uzumaki clan?" Jiraiya asked.
"To be precise, the Sage Body is a Public belief shared by both the Uzumaki clan and the Senju clan. However, there are some differences between the two, though I don't know exactly what they are.
The clan's secret records only mention that both the Uzumaki and Senju clans possess the same Sage Body Public belief, but their manifestations differ somewhat. As for the exact differences, it wasn't specified," Tsunade said seriously.
Rin's current condition reminded her of her grandfather—Senju Hashirama, known as the God of Shinobi. Although Hashirama was famous for his Wood Release, leading many to believe that it was the Senju clan's Public belief, Tsunade knew that was just a misconception.
The true Public belief of the Senju clan was the Sage Body.
It was precisely because her grandfather had awakened the Sage Body that he possessed such immense chakra, allowing him to wield Wood Release.
"The Sage Body, huh? But in his current state, he's attracting too much attention. Is there any way to control it?" Jiraiya asked. Although he was happy that Rin had awakened a Public belief, this constant overflow of life force was a problem.
"This is a natural reaction. It can't be suppressed at all," Tsunade frowned. Rin's situation was entirely due to the overwhelming vitality within his cells, which was continuously leaking out uncontrollably.
"Then what do we do?" Jiraiya was troubled. Life force wasn't chakra—it couldn't be sealed. Unless they sealed every single cell in Rin's body, which was obviously impossible.
While Tsunade and Jiraiya were discussing solutions, Rin was lost in thought about what Tsunade had said earlier.
Tsunade didn't know the differences between the Uzumaki and Senju Sage Bodies, but Rin, who had seen Naruto, had his own guesses.
There had been many theories suggesting that although both clans possessed the Sage Body, the Uzumaki clan's vitality was significantly stronger than that of the Senju.
Whether it was Kushina Uzumaki, Nagato Uzumaki, or Karin Uzumaki, all of them demonstrated extraordinary vitality—and that was without even awakening the Sage Body. If they had, their vitality would have been even more terrifying.
But what about the Senju clan?
Aside from Hashirama, who awakened the Sage Body and became the God of Shinobi, the rest of the clan only showed above-average chakra reserves, with nothing particularly special. That didn't align with the expected traits of a Sage Body.
Thus, a theory emerged.
The Uzumaki clan might have inherited the physique of the Ten-Tails vessel from the Sage of Six Paths—essentially the Sage Body of the Ten-Tails' husk. This could explain why the Uzumaki were perfect Jinchuriki, while the Senju were not.
As for the Senju's Sage Body, it might require the addition of Yang Release or natural energy to awaken. That would explain why, aside from Hashirama, no other Senju had successfully awakened it—the requirements were simply too harsh.
Meanwhile, the Uchiha clan, inheriting Yin Release through the Sharingan, had undergone degeneration. This made awakening easier but reduced its power. Achieving the Eternal Mangekyō Sharingan was no easier than a Senju awakening the Sage Body.
As for Rin's current "fake" Sage Body, it was merely an external manifestation caused by fusing with the long-lived tree. It was definitely not a true awakening of the Sage Body.
He guessed that for the Uzumaki to truly awaken their Sage Body, it would be just as difficult as the Senju or Uchiha awakening their ultimate powers. It likely had something to do with Tailed Beasts—but as for how exactly, he had no clue yet.
While Rin was thinking through all of this, Tsunade finally came up with a solution—though it wasn't perfect.
Since it was impossible to stop Rin's cells from releasing life force, the only option was to make his body capable of handling and storing it. That way, the excess vitality wouldn't leak out.
Continuously consuming that life force wasn't realistic, so the only viable method was to store it.
"What?! Tsunade, you want me to learn an S-rank sealing technique—the Strength of a Hundred Seal?" Rin was completely stunned.
The Strength of a Hundred Seal was on the same level as the Dead Demon Consuming Seal. Although it didn't appear as terrifying, it fully deserved its S-rank classification.
And now she wanted a four-year-old—who had only just learned to refine chakra—to start learning an S-rank sealing technique?
Wasn't that pushing things a bit too far?
"What? Don't want to learn? Let me tell you—until you master the Strength of a Hundred Seal, you're not leaving this house. If you do…" Tsunade clenched her fist threateningly.
"…But what about learning ninjutsu?" Rin asked weakly. Going against Tsunade now would only get him beaten.
"That won't interfere. Jiraiya will come to teach you. From today onward, you'll stay here until you master the Strength of a Hundred Seal," Tsunade declared, leaving no room for argument.
And just like that, Rin began living with Tsunade.
It was both painful and enjoyable.
Because the life force he emitted was beneficial to others, Tsunade insisted on holding him every night as they slept, claiming that instead of wasting that life force, she might as well benefit from it.
That's right—Tsunade had discovered that Rin's life force could slow cellular aging.
From that moment on, she never left his side, treating him like a living elixir of immortality.
[ New Book Please Send Power Stones And Add To Collection]