Naruto: Getting Observation Haki By Sacrificing The Byakugan

This situation was truly unavoidable. After all, Tsunade was elusive—finding her was never an easy task.

Information about the "big fat sheep" circulated throughout the shinobi world. Some of it was true, some false, and no one could say for certain which was which.

Given Konoha's current crisis after the attack from Orochimaru, it was impossible to dispatch a large number of shinobi just to track down Tsunade.

Still, despite how troublesome the mission was and the low odds of success, Kurenai Yuhi didn't complain. After all, the mission granted her a rare level of freedom.

Didn't this mean she could take her team out and travel?

Kurenai estimated that, with her current strength, as long as she didn't run into monsters like Uchiha Madara (who was supposed to be long dead) or the mysterious leader of the Akatsuki, things would be manageable. There would be no issue with how she guided her genin.

And even if she did encounter such threats, she had a trump card—her boyfriend, who could instantly teleport to her side in an emergency.

"These Iwagakure shinobi are surprisingly honest... they didn't play any tricks. Since that's the case, let them take the Tailed Beast."

Following Kawaki Aoba's decision, the Five-Tails—Kokuō—was released from containment. No longer a research specimen, the beast was sealed into a temporary vessel and formally handed over to Iwagakure.

The Iwa-nin were stunned. They had thought Konoha's mention of the Five-Tails was a bluff or negotiation ploy. They hadn't expected Konoha to actually give them the beast.

Faced with such sincerity, were they moved? Perhaps a little—but trust between villages was always complicated.

Regardless of their feelings, the Five-Tails was now in their custody.

As the Iwagakure delegation departed, Kawaki Aoba's Observation Haki tracked their every step—his next mission already in motion.

Of course, his goal wasn't to steal back the Five-Tails.

To him, Kokuō was just an average Tailed Beast—not worth doing anything disgraceful over. If it were Son Gokū, the Four-Tails, that would be different.

Yes, this time Kawaki Aoba was going after the Four-Tails.

Disguised once more as Smoker—his favorite persona—Aoba used Instant Transmission to return directly to one of the Akatsuki's underground strongholds.

This time, he didn't come empty-handed. With him was a satchel full of bright blue potions—gifts meant for the imprisoned Son Gokū.

"Son Gokū... I've kept you weak for a long time. I apologize," Aoba said sincerely as he stepped into the massive, rune-filled chamber where the Four-Tails was restrained.

The enormous monkey glared at him, red eyes blazing. Heavy chakra-suppressing chains bound his limbs and torso, sealing his power.

Seeing the man who regularly drained his chakra, Son Gokū roared—an ear-splitting, bestial cry of fury and resistance.

That was all he could do now.

"Such a warm welcome," Kawaki Aoba said dryly. "I'll take that as your way of saying hello."

He held up one of the bottles. "I brought you a gift this time. If this works, maybe... you won't have to endure chakra siphoning anymore."

He gently tossed the bottle into the air, caught it, and used his mental focus to uncork it. The shimmering blue liquid swirled inside.

"What do you say, Gokū? Will you drink this yourself, or shall I help you?"

The Four-Tails roared again, louder this time, but still didn't speak.

Years of imprisonment had worn down even his spirit. There were no more words to curse with—just endless rage.

Kawaki Aoba sighed. "So I'll do it by force, then."

A dense white mist rose from his body—his signature chakra technique—coalescing into giant spectral hands that forced open Son Gokū's mouth.

The Four-Tails thrashed violently, trying to resist, but the chains held fast. The potion was poured down his throat, and in moments, his depleted chakra began to regenerate.

Son Gokū's eyes widened in disbelief.

He felt strength returning—but he immediately understood what this meant.

This was no act of kindness.

He began thrashing wildly, trying to break the chains, but Aoba was prepared.

"Beast is beast. Even if it speaks human words, it remains a beast."

With cold detachment, Kawaki Aoba placed a hand against the Four-Tails and began extracting chakra—once again.

The flow was smooth—he had done this many times.

The difference now was the source. The chakra he extracted had been restored artificially by the potion.

Aoba examined the collected chakra carefully. It felt... normal.

That was enough.

He sent the chakra into his sacrificial altar.

> [Extremely Incomplete Saiyan Bloodline +1]

"It really worked," he whispered, smacking his forehead. "Why didn't I think of this sooner? If I'd gotten the full Saiyan bloodline earlier, I could've blown up this whole world by now."

But better late than never.

He tossed the empty blue bottle aside and took out another.

"Come now, Son Gokū... it's medicine time."

Once again, he poured the potion into the Four-Tails' mouth, ignoring the beast's muffled growls.

Then, once again—he drained the chakra.

The recovery time of a large blue potion was ten minutes, and the large blue potions Kawaki Aoba had brought this time were enough to fill an entire Satiety Pouch.

Question: If a single portion of the Four-Tails' complete chakra could be exchanged for one portion of an extremely incomplete, low-level Saiyan bloodline—

Then what could be obtained by sacrificing countless portions of the Four-Tails' chakra, amassed together?

Kawaki Aoba pondered this silently. Once he used up all the large blue potions in the Satiety Pouch, perhaps the answer would be revealed.

That was his thought at the time.

But three days later, his thinking had already changed.

"In three days, I've only consumed just under 500 bottles of these large blue potions. At this rate, it'll take me at least a year and a half to empty my Satiety Pouch."

Licking his lips, Kawaki Aoba finally gave in. He decided not to wait any longer.

Sacrifice.

The tailed beast chakra he had gathered over the past three days vanished from the altar, replaced by something familiar, something long yearned for.

Kawaki Aoba stared at it, then smiled and absorbed it into his body without hesitation.

A flawed low-level Saiyan bloodline.

It differed by only two words from the "extremely flawed Saiyan bloodline" he had received previously. Yet the difference in sensation was worlds apart.

An overwhelmingly comfortable energy surged through his body. If he had to describe it, it was like scorched farmland drinking deeply from fresh rainfall, or a dying fish suddenly plunged back into a cool, clean lake.

And that description was no exaggeration.

If he hadn't been fully aware of his own consciousness, Kawaki Aoba might have believed he was evolving into another species entirely.

Suddenly, a fierce itch shot up from his tailbone. It felt like something was trying to break out—like a limb yearning to manifest. He reached back and scratched at it, but found nothing there.

Yet the sensation faded just as quickly as it came.

He fell silent, thoughtful. That sensation… it had to be the Saiyan tail.

Everyone knew Saiyans had tails. But he didn't have one—not yet.

But that was fine. So long as he could complete the bloodline, a tail would come in time.

Kawaki Aoba believed that with his continued efforts—and by thoroughly draining the Four-Tails' chakra—he could one day awaken the tail.

He glanced at the Four-Tails, Son Gokū. After three days and nights of constant suppression and chakra extraction, the mighty beast had become docile. No matter what Kawaki Aoba did, it no longer resisted.

---

Time flew by. A month passed.

The other major ninja villages became increasingly wary of Konoha. But none dared provoke it—not after witnessing what happened to Iwagakure, razed in a single night by Kawaki Aoba, the man who defied all logic.

Despite their shared fear of Konoha, the remaining villages—Kumogakure, Sunagakure, Kirigakure, and even a restructured Amegakure—began to communicate more frequently, forming cautious ties and exchanging intelligence.

Every village dreamed of claiming the Ten-Tails Jinchūriki for themselves. But such a being was rare—possibly even myth. If the Ten-Tails did exist, only one person, one village, could wield it.

That understanding fostered hesitation and paranoia.

Even with Konoha as a growing threat, no village dared make the first move. Not even to discuss the resurrection of the Ten-Tails openly.

And so, the ninja world's progress slowed.

---

Meanwhile, far away, Yūhi Kurenai led a small team of three—her disciples, who were now nearly her age—toward the Land of Grass.

There was no Kusagakure anymore. It had collapsed in the chaos. What remained was a neutral zone housing a minor shinobi prison, unremarkable on the grand scale of nations.

But Kurenai and her team hadn't come for the prison.

They were here following rumors—rumors about a "legendary big fat sheep" of the gambling world.

"I heard that the ninja world's legendary big fat sheep came through here," Kurenai said, asking around at a dingy tavern.

The drunkard she approached blinked through his haze, then began to boast.

"You bet! Just yesterday, I won big off that guy. The trick is simple—just bet against whatever he bets on. You'll win, no matter how absurd the odds!"

"They say he'll be at the gambling house again tonight. I wouldn't miss it for the world!"

Kurenai's eyes narrowed. She leaned closer and activated a minor genjutsu illusion, conjuring an image for the drunkard to confirm.

"Take another look. Did the person you saw look like this?"

The drunkard squinted, then nodded furiously.

"Yeah, yeah! That's him! Big as hell!"

Kurenai raised an eyebrow. She wasn't sure what the drunkard meant by "big", and frankly, she didn't want to know.

"Finally," she murmured. "We've been chasing this guy for over a month."

It had been a long and frustrating journey, full of false leads and impostors. They'd encountered more con artists posing as the "fat sheep" than rogue ninja or bandits combined. Each imposter had brought more chaos and confusion, and by now, the team was nearly numb to it all.

They only wanted to complete their mission—or at least confirm the target's identity.

Even if they failed the mission, Kurenai would be content to let her disciples experience the chaos of the shinobi world for their own growth.

Despite her high rank, Yūhi Kurenai had her priorities straight. She knew the value of experience over rigid duty, especially in this age of unrest.

"Let's find a place to settle down first," she said. "We'll meet with Tsunade, one of the Sannin, tonight."

Still, Kurenai discreetly activated her Observation Haki—a technique she had honed through unconventional means outside standard Konoha teachings.

Her range wasn't nearly as refined as Kawaki Aoba's, whose mastery of Observation Haki allowed him to detect even the faintest chakra fluctuations across entire regions. But she could still sense a powerful presence if that person wasn't actively concealing their aura.

That was why she hadn't used her Haki to scan every town previously—it was exhausting, and not always effective when facing opponents who were good at hiding their energy.

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