The complete Byakugan, without a blind spot, and the main family of the Hyūga clan could no longer control the branch family's life and death.
The Caged Bird seal indeed had the role of protecting the branch family, but with Konoha merging with the Sand Village and about to annex the Land of Rain and the Land of Rivers, it was on its way to becoming the largest shinobi village in the ninja world.
Now, both Iwa and Kumo were practically forced to keep their heads down. They didn't have the time to recover their strength or train their shinobi, so it was unlikely they would target the Hyūga clan again.
Moreover, Yoichi had already assured the Hyūga clan that if any incident involving their bloodline occurred, the village would seek justice for Konoha's shinobi. Unfortunately, the elders of the Hyūga main family were unwilling to abolish the Caged Bird, whether it was truly for the good of the Byakugan or simply for their entrenched control over the branch family.
After the Caged Bird seal on Rumi was removed, she felt like she had shed a layer of restraint, and the range she could see with her Byakugan had greatly increased.
"Sensei, I feel amazing right now. When do we set off for the mission you mentioned?"
Rumi had never felt this good before. After the Caged Bird was lifted, it was as though her shackles were gone. Her gaze at Yoichi was full of admiration.
What Kurenai could do, I can do too. No, why compare myself to Kurenai? What Rin could do, I can do as well!
Rumi moved a little closer, instinctively looking up at Yoichi's face. He hadn't changed a bit over the years—always the same kind teacher to her.
Since her sister got married, she hadn't been around as much, and Yoichi was the only one who cared about her. Without him, Rumi felt she wouldn't have even learned Gentle Fist.
This is wonderful~!
Rumi thought to herself in delight, but then she saw a hand waving in front of her eyes and snapped back to reality.
"Rumi? Are you alright?"
"I'm fine, really. Sorry, sensei, I got distracted for a moment."
Rumi apologized quickly, a bit embarrassed.
Yoichi shook his head and said, "No problem. I'll repeat myself—aside from an unknown enemy, the village is fine, so you'll accompany me when the time comes."
He could go alone, but since it was related to Hamura, they might need the Byakugan. If anyone from the Ōtsutsuki main family was still alive on the moon, they might pass on some memories about the Tenseigan to those with the Byakugan.
Yoichi remembered a spatial tunnel leading directly to the center of the moon.
He recalled there was a waterfall somewhere within the Fire Country, underneath which there was glowing spring water. Finding that would allow access to the tunnel to the moon.
But that was troublesome; he'd rather fly directly to the moon and break in from the surface.
"Sensei, are you thinking of something troublesome?"
Seeing Yoichi frowning slightly, Rumi bravely reached out and gently massaged his forehead.
Yoichi smiled and said, "Nothing serious. If you're free today, we can set off now."
It was better if he went by himself. If he left it to subordinates, they'd probably take more time investigating, and using the Byakugan would still be a hassle. Flying up himself would be quicker.
Rumi asked in surprise, "Now?"
"Yes. Do you need to go home and let anyone know?"
"No need, I can leave anytime."
Rumi shook her head. Since her sister got married, she had been living alone. It didn't matter whether she went back or not; she spoke more with Kurenai in one day than she did with her own clan in a month.
"Then let's go. I'll take you to the moon."
After Yoichi spoke, his eyes transformed into the Rinnegan with six tomoe, and he donned the tomoe-patterned cloak and Truth-Seeking Orbs.
He had already told Mikoto and Mina that he might not be back for a day or two, so there was nothing to worry about.
"Wait here for a moment, Rumi."
To go to the moon, using time-space ninjutsu was fastest. Yoichi first went to find his Kamui clone.
After locating his Kamui clone, he had it wear the Potara earring on its other ear, and then the Kamui clone rushed towards Yoichi.
Once this was done, Yoichi returned to Rumi's side, enveloping her in chakra. "Alright, let's go."
With that, the space around them distorted, and they vanished from where they stood.
In the next instant, when Yoichi and Rumi reappeared, they had left Earth and were standing in space.
"Is this... Sensei, have we already left the ninja world?"
Seeing the dark environment of space and the planet beneath their feet, Rumi's face was filled with shock. Upon closer inspection, she could see vast stretches of yellow desert and the blue ocean on the ninja world below.
Standing in space and gazing at the ninja world for the first time left Rumi somewhat dazed. When she came to her senses, she couldn't help but look at Yoichi with admiration in her eyes. In her mind, her teacher was practically a deity.
"That's right. Next, we'll head to the moon, so listen to my instructions when we get there."
This was Yoichi's first time on the moon, but he wasn't as surprised as Rumi. He merely experimented by withdrawing his chakra to see if he could survive in space.
Even without breathing, it didn't matter; the primal energy and chakra within him could sustain him for a long time, with no risk of being depleted.
In the next moment, Yoichi locked onto the moon's location and used Kamui to continue traveling through space. When he and Rumi reappeared, they were already on the moon's surface.
Looking at the barren, crater-ridden landscape of the moon, Rumi couldn't help but ask, "Sensei, do the Hyūga clan members really live in a place like this?"
"Of course not on the surface. They live inside the moon. And this moon wasn't naturally formed; it was created by the Sage of Six Paths over a thousand years ago."
Yoichi explained, and then used Kamui again, phasing through the moon's surface and arriving inside.
The environment suddenly brightened. After a thousand years of development, Hamura's descendants had built the moon's interior into a true paradise.
With an artificial sun, distinct day and night cycles, artificial lakes, forests, and more, Yoichi was most interested not only in the Tenseigan here but also in the puppet technology controlled by Hamura's descendants.
Most of the moon's interior was constructed by puppets, powered by the gigantic Tenseigan.
With this puppet technology and the resources on the moon, he could fully realize his vision of transforming the Land of Fire and the ninja world.
"Sensei, is this where the Hyūga clan members live?"
Rumi had already been shocked enough for one day, but upon seeing this environment, she couldn't help but ask again.
The things she had seen today completely overturned her past decade of life experiences.
If I wrote today's events with Sensei into my diary and let Kurenai accidentally find it, hehe...
Thinking of this, Rumi couldn't help but smile slightly, imagining Kurenai's embarrassed, red face.
Yoichi's current perception was powerful. By expanding his mental energy, he could sense all chakra reactions throughout the moon's interior.
"There are three places—one with immense chakra, another which should be Hamura's last descendant, and one with a relatively faint presence, possibly chakra left by the main family."
After perceiving the area, Yoichi turned to Rumi and said, "Let's first investigate the chakra left by the main family. There may be information about the Tenseigan."
He didn't know much about controlling the massive Tenseigan, so it would be good to gather more information.
"The main family, huh..."
Rumi muttered, harboring no good feelings towards the main family due to their past. Hearing that the main family on the moon lost to the branch family made her secretly rejoice.
"There are no threats to the Byakugan here on the moon, so the main and branch families have different legacies but no Caged Bird seals."
Guessing Rumi's thoughts, Yoichi explained to her.
"I did talk to Hiashi about this. Given the current state of the village, the Hyūga clan doesn't need the Caged Bird seal to protect the Byakugan anymore. Maybe he's still apprehensive, and I, as an outsider, am not in a position to comment on their clan's legacy."
"Sensei, you're acting with good intentions, but those main family members just won't give up their power and status!"
Rumi immediately said, then clenched her fist, showing her determination. "Sensei may not be able to speak out, but I can. Now that they can't control me with the Caged Bird, I want to know—what other excuses do they have to keep it when it isn't necessary for protecting the Byakugan?"
"...."
Yoichi thought for a moment. It seemed he might have said a bit too much. However, it didn't matter anymore. Soon enough, Rumi would have Hamura's legacy, be free from the Caged Bird seal, and have him—Konoha's Fifth Hokage—backing her.
It would be obvious who was the rightful successor of the Hyūga clan.
Under Yoichi's guidance, they quickly used Kamui to locate the basement of a castle, where they found a remaining member of the main family.
Upon Yoichi and Rumi's arrival, this person seemed to react, slowly walking towards Rumi while calling her 'Byakugan Princess' and similar titles.
This made Yoichi look on with some skepticism. So, anyone who comes here is a Byakugan Princess?
He could tell that this individual was only sustained by chakra. After transferring the chakra, this main family member crumbled into a pile of bones.
Rumi stood there in a daze for a while, and once she processed the information, she said to Yoichi, "Sensei, this main family member recently passed away, but before dying, they told me that the branch family twisted Hamura's will, intending to use the moon to destroy the ninja world."
"It doesn't matter. There's only one child left in the branch family now. We can bring him back to Konoha and give him a proper education."
Yoichi then asked, "Rumi, did you get any information about the Tenseigan?"
"Yes, the main family had a lot of knowledge about the Tenseigan. Although they weren't as ruthless as the branch family, gathering all the reverse Byakugan to create the Tenseigan as a weapon... as long as there's Byakugan chakra, it can be used to drive the Tenseigan, but its power can only be fully unleashed if the Tenseigan itself is used."
Rumi explained that if the Tenseigan on the moon was fully activated, it might be even more powerful than a tailed beast.
"Sensei, if you need a Byakugan, I can..."
Thunk!
Yoichi knocked on Rumi's forehead, interrupting her, "Do you think your teacher would need a student's eyes, Rumi?"
"I offered willingly..."
Rumi whispered, covering her forehead, but when she saw Yoichi raising his hand again, she quickly shut her mouth.
Yoichi had already asked Tsunade to help cultivate clones of the Byakugan, and within a few years, they could awaken the Tenseigan, just like Kamui clones.
For now, it would be best if Rumi took charge of controlling it.
"Next, let's go find that branch family member, bring him back to the village, and then take over the Tenseigan and other legacies here on the moon."
"Understood, sensei."
Rumi responded, showing no guilt about taking over Toneri's residence and legacy. The branch family members had planned to destroy the ninja world, so why show them any mercy?
Besides, Rumi was also a descendant of Hamura. It was only natural for her to inherit Hamura's legacy.
When Yoichi and Rumi appeared in front of Toneri, he was still practicing his clan's techniques.
"Who's there?!"
Sensing someone nearby, Toneri immediately asked. He had no Byakugan and could only rely on his senses.
"Sensei, the branch family on the moon is so ruthless. They didn't even leave a single Byakugan..."
"A battle to the last breath leaves no room for anything to be spared. That's why the main family lost."
Hearing their conversation, Toneri guessed they had come for him or the main family on the moon. He was about to control the puppets to attack them when he suddenly felt a pain in his neck.
In an instant, Yoichi appeared behind Toneri and knocked him out. Then he looked at Rumi.
Rumi immediately understood. "Rest assured, sensei. Now that there's no one competing with me for control over the Tenseigan, I can gain control of everything here quickly."
"Don't let your guard down. I'll give you some chakra to help you control the puppets first."
After saying this, Yoichi sealed some of his chakra inside Rumi's body to prevent her from running out.
Not knowing whether his chakra counted as Ōtsutsuki's, Yoichi took some chakra from Toneri and transferred it to Rumi, sealing it in her Byakugan.
"Sensei..."
"What is it?"
"It feels... strange, but then it stopped."
Rumi suddenly felt a warmth in her Byakugan, but the sensation quickly faded. She smiled sweetly at Yoichi and said, "I'll go take control of the Tenseigan now, sensei."
"Yes, go ahead."
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