The dark, jagged tunnel leading beneath the surface of the moon sloped downward at a sharp angle. Nanami Kento led the way, his footsteps completely silent. Behind him, Orochimaru, Amado, and the Hyuga family followed closely, adjusting their footing to the slightly altered gravity of the subterranean passage.
After several minutes of descent, the narrow rock walls abruptly fell away.
The group stepped out onto a high ridge, and the oppressive darkness was instantly banished by a soft, ambient light.
"Fascinating," Amado murmured, pulling a small, leather-bound notebook from his cloak. He adjusted his spectacles, his analytical eyes sweeping over the vast expanse before them. "An entirely self-contained, artificial biosphere resting within the crust of a celestial body."
It was a world hidden beneath the stone. An artificial sun, glowing with a steady, pale yellow light, hung suspended in the center of the massive, hollowed-out cavern. Below it stretched a sprawling landscape of deep oceans, rolling hills, and thick forests.
However, the environment was distinctly alien. The trees possessed pale, luminescent bark, their leaves shimmering with faint traces of blue and silver chakra. Strange, multi-winged birds glided through the still air, their calls echoing softly across the silent terrain.
"The flora and fauna have adapted to a pure chakra environment," Orochimaru hissed softly, a predatory gleam in his golden eyes. He extended a pale hand, and several small white snakes darted from his sleeve into the underbrush to capture a few of the glowing insects for later study. "A pristine, isolated evolutionary path. The biological data here is invaluable."
"Keep your focus forward, Orochimaru," Nanami instructed calmly. "We are not here on a gathering expedition. We are here to assess the remaining threats and locate the origin of the Hyuga bloodline."
Hiashi Hyuga stood near the edge of the ridge, keeping Hinata and Hanabi securely behind him. His Byakugan was active, scanning the distant horizon.
"There are structures ahead," Hiashi reported, pointing toward a large, elevated landmass in the distance. "A settlement. It appears heavily damaged, but I detect faint traces of life."
"Then we move," Nanami said.
They traveled across the artificial landscape, moving swiftly through the glowing forests and over the calm, unmoving streams. The environment was eerily quiet, entirely devoid of the bustling, chaotic energy of the natural world on Earth.
As they approached the settlement, the scale of the destruction became apparent.
It was a city composed of grand, pale stone castles and sweeping courtyards, built upon floating islands of rock tethered to the ground by thick iron chains. But the city was in ruins. Entire towers had collapsed into rubble. Massive craters scarred the courtyards, and the stone walls were marred by deep, ancient scorch marks and the unmistakable damage of high-level chakra impacts.
"A warzone," Hiashi noted grimly, deactivating his eyes as they walked through the silent, empty streets. "This damage is not recent. It has been abandoned for decades."
They navigated the debris until they reached the largest, most intact castle at the center of the floating city. The heavy wooden doors were already broken, hanging loosely on their hinges.
Nanami stepped inside the grand hall. The air was stale, thick with dust and the unmistakable scent of severe illness.
In the center of the vast, empty room, resting on a simple, elevated stone bed, lay an emaciated man. His skin was deathly pale, and his breathing was a harsh, wet rattle. Standing beside the bed, holding a small bowl of water with trembling hands, was a young boy.
The boy, roughly twelve years old, possessed shaggy, pale blue-white hair and wore simple, unadorned robes. His eyes were closed, the skin around them completely smooth and undisturbed.
Toneri Otsutsuki and his dying father.
The moment Nanami's boots touched the stone floor, the young boy spun around, dropping the bowl of water. It shattered against the ground. The boy could not see, but he sensed the sudden, overwhelming intrusion of foreign life forces.
"Who is there?" Toneri demanded, stepping protectively in front of his father's bed. His voice cracked with a mixture of fear and defiance. "You do not belong here!"
The frail man on the bed stirred. He forced his eyes open, coughing weakly. He looked past his son, his gaze falling upon the intruders. His eyes widened in profound shock.
"Humans..." the father rasped, struggling to prop himself up on his elbows. "People from Earth... how did you bypass the guardian? How did you breach the sphere?"
"The guardian was biologically deactivated and placed into storage," Nanami replied, his voice calm and level. He kept his hands in his pockets, projecting zero hostility. "We are here on an expedition of history and security. Relax your guard. We have no intention of harming a dying man and a child."
The father's gaze drifted from the blonde man to the figures standing behind him. He saw Hiashi, Hinata, and Hanabi. He saw the pure, unblemished white eyes of the Hyuga clan.
The old man gasped, a sudden, ragged breath escaping his lungs. He fell back against his pillow, a bitter, tragic smile touching his pale lips.
"The descendants of Earth," the father whispered. "You have finally come. The Hyuga."
Hiashi stepped forward slightly, his posture rigid and formal. "You recognize our lineage. You share the blood of our ancestors."
"We share a curse," the father corrected, coughing a speck of blood onto his sleeve. Toneri knelt beside him, gripping his hand tightly. "We are the Branch family of the moon. The last of our kind."
Nanami looked around the massive, ruined hall. "You are the only two remaining? The scale of this city suggests a population of thousands."
The father closed his eyes, a look of deep shame and sorrow etching itself into his weathered face.
"We destroyed ourselves," the father confessed, his voice weak but echoing clearly in the empty hall. "For centuries, the descendants of Hamura lived in harmony. The Main family sought to observe the Earth in peace, waiting for the day the world below found true understanding."
The man opened his eyes, staring blankly at the ruined ceiling.
"But the Branch family... we believed the Earth had failed. We watched your wars and skirmishes. We watched you weaponize chakra, turning the Sage's teachings into tools of slaughter. We believed that Hamura's decree demanded the destruction of your world if you strayed from the path. We believed it was our sacred duty to cleanse the planet and start anew."
"A civil war," Amado noted quietly, jotting the history down in his notebook. "Ideological extremism leading to mutual eradication."
"Yes," the father nodded slowly. "We rebelled against the Main family. We utilized the ultimate weapon of our clan to wipe them out completely. But in our victory, we sealed our own doom. The weapon demanded a heavy toll, and the war left our numbers decimated. We dwindled. The bloodline thinned. Now, only I and my son, Toneri, remain. And I will not last the week."
Nanami listened to the tragic tale without a single shift in expression. He did not offer pity.
"Your entire history is based on a lack of critical thinking," Nanami stated flatly.
The father blinked, stunned by the cold, blunt assessment. "What?"
"You are not gods," Nanami explained, his voice devoid of anger but firm with undeniable logic. "You are mortal descendants living in an artificial cave. Yet, you assumed the authority to judge an entire planet based on a misinterpreted decree from a man who has been dead for centuries."
Nanami stepped closer to the bed, looking down at the dying man.
"You fought a war to destroy the Earth to enforce a peaceful ideal. The contradiction in that logic is staggering. You annihilated your own family and drove your species to extinction simply because you believed you held the moral high ground. It is not a sacred duty. It is a catastrophic failure of basic reasoning."
The father stared at the blonde shinobi. He had spent his entire life bearing the heavy, holy guilt of his clan's purpose. To hear it dismissed as a mere failure of logic was jarring, yet stripped of its religious weight, the truth of Nanami's words cut deep.
The old man lowered his head, tears slipping from his eyes. "We were fools. Blinded by our own arrogant devotion."
Nanami did not linger on the man's regret. He turned his attention to the broader environment. The natural energy in the cavern was strangely aligned, drawn toward a specific, resonant point.
"Let us see what Hamura Otsutsuki actually intended," Nanami said.
He turned to Hinata, who was standing quietly behind her father.
"Hinata," Nanami instructed gently. "Since we entered this artificial sphere, I have felt a specific resonance reacting to the purity of your bloodline. Activate your Byakugan. Scan the upper levels of this city. Tell me if you see a focal point of chakra that feels distinctly different from the rest of the ruins."
Hinata hesitated for a fraction of a second, looking up at her father. Hiashi gave her a firm, encouraging nod.
Hinata stepped forward. She brought her hands together.
"Byakugan!"
The veins around her eyes bulged. Her vision expanded, piercing through the stone walls of the castle and scanning the floating islands above them. She searched through the lingering, stagnant chakra of the dead city until her sight locked onto a specific location.
"I see something," Hinata reported, her voice steady. "Inside the floating castle high above us. There is a strong, pure energy there."
"Good," Nanami nodded. He turned back to the bedridden man and his son. "We are going there. And you are coming with us."
"I... I am also coming, Toneri come help me," the father wheezed.
Toneri, the young boy stepped to the side of the bed. He placed his small shoulder under his father's arm, hoisting the frail man up.
Together, the group exited the ruined hall. They walked slowly, matching the pace of the ailing man, ascending through the ruined castle and crossing the stone bridges that led to the highest floating island Hinata had located.
They arrived at the floating shrine. It was a simple, elegant stone structure, entirely untouched by the destruction that had ravaged the rest of the city. In the center of the open courtyard rested a large, unadorned stone monument.
The grave of Hamura Otsutsuki.
When they reached the center of the courtyard, the atmosphere shifted violently.
The presence of Hinata and Hanabi's pure Byakugan resonated directly with the ancient cemetery. A deep hum filled the silent air, and the stone monument began to glow with a brilliant white light.
From the center of the glow, ethereal figures began to manifest. They wore traditional, flowing robes, their pale eyes staring peacefully. They were the spirits of the Main Family.
Stepping forward from the center of the spirits was a single, commanding figure. He possessed long, pale hair, two horn-like protrusions on his forehead, and pure white eyes.
Hamura Otsutsuki.
The spirit looked over the gathered group. His gaze settled heavily upon Toneri's father.
Hamura's expression was one of disappointment.
"You failed to understand my will," Hamura spoke, his voice resonating directly within their minds. He expressed his deep sadness over the senseless death of all the descendants on the moon. "You allowed arrogance to blind you, and reduced our legacy to dust."
Toneri's father could not bear the weight of his ancestor's gaze. He fell to his knees on the stone floor, completely devoid of strength. He grabbed Toneri by the sleeve, dragging the young boy down into a kneeling position beside him.
"Forgive us, Ancestor," the father apologized, his voice breaking. "We were arrogant. We are deeply sorry."
Hamura did not offer absolution to the broken man. He turned his gaze away and looked at Hiashi Hyuga.
"The descendants of Earth," Hamura noted. "It seems my descendants of Earth are living peacefully."
Hiashi and his daughters bowed deeply to the ancient spirit.
"All this is because of Lord Nanami," Hiashi stated firmly, gesturing respectfully toward the blonde shinobi.
Hamura shifted his pale eyes to Nanami. The ancient spirit assessed him, sensing the deep reserves of chakra and the total absence of malice.
"You have my thanks," Hamura said, bowing his head slightly to Nanami. "Thank you for everything you have done for the Hyuga family, making sure there was harmony in the clan."
Nanami offered a short, polite nod. "I simply prefer an orderly environment."
"I wanted to talk more," Hamura continued, his ethereal form beginning to waver at the edges, the white light flickering. "But I do not have much time."
Hamura turned his attention back to Hinata and Hanabi.
"Those are the purest Byakugan," Hamura said softly. "Let me give my final gift to my descendants."
Hamura floated forward. He extended his hands, placing his glowing palms gently over the heads of Hinata and Hanabi. A surge of pure, white chakra flowed from his spirit directly into the two girls, settling deep within their visual pathways.
With a final pulse of light, Hamura gave his chakra to them and disappeared entirely, leaving the courtyard empty of spirits.
Nanami looked down at Toneri and his father, who were still kneeling on the stone floor.
"So," Nanami said flatly. "What are you going to do now?"
The father slowly pushed himself up to a kneeling position, wiping his face. His voice was hollow.
"I am already weak," the father rasped. "And I want to atone for the sins the Branch family has created."
He reached out and pushed Toneri forward toward the Konoha group. Toneri, who was the same age as Hinata, stumbled slightly.
"Please," the father pleaded, looking at Nanami. "Take him with you. Make sure he lives happily on Earth."
Nanami watched the display. His expression remained completely unsympathetic.
"You can atone for your sins by living," Nanami stated bluntly. "Come with us. We will treat you and see if we can cure your illness. Then we will see what you can do to atone for your sins."
The father stared at the blonde man, overwhelmed by the pragmatic offer. He nodded weakly. "Yes. I will come."
"Good," Nanami said. He shifted his focus to his next objective. "Now, what about the Tenseigan?"
Toneri's father froze. The sheer shock of hearing that word caused him to momentarily forget his illness. "How... how do you know of that?"
Orochimaru stepped forward, a cold smile spreading across his pale face.
"Please," Orochimaru hissed smoothly. "We can feel the energy radiating from it since we entered the settlement. Will you show it to us?"
The father swallowed hard, realizing resistance was futile. He nodded. "I will show you."
Meanwhile, Hiashi knelt beside his daughters, inspecting them closely after the chakra transfer.
"Are you both alright?" Hiashi asked, checking their eyes. "Is everything okay?"
Hinata and Hanabi both nodded, rubbing their eyes and feeling a newfound sharpness in their vision. "We are okay, Father," Hinata replied.
"Follow me," the father whispered, leaning heavily on Toneri.
He led them deeper into the floating castle, navigating a series of descending stairwells. They arrived at a massive, reinforced subterranean vault.
The father placed his hand on the stone door, channeling a weak pulse of his chakra into the locking mechanism. The doors ground open.
They stepped into a vast chamber.
In the center of the room, suspended in the air, was the Giant Tenseigan. It was a colossal, glowing yellow orb that pulsed like a beating heart. The light it cast was blinding.
"It was forged over centuries," the father told them quietly, leaning against the wall. "When a member of the Branch family died, their eyes were removed and added to the vessel. We amassed the power of our entire lineage into this single core."
The father looked at the glowing orb. "It is the weapon we used to destroy the Main family. It possesses the power to move the moon itself, and it is used to judge the Earth."
Hearing the explanation of how it was made and what it was used for, Orochimaru and Amado shared a look of interest.
"Thousands of distinct visual networks operating in absolute synchronization," Orochimaru noted, walking around the base of the glowing sphere.
"The energy output is astronomical," Amado added, pulling out his measuring devices.
Nanami watched the two scientists as they started to examine the Giant Tenseigan closely. The expedition to the moon had yielded the ultimate harvest, and the ancient secrets of the Otsutsuki were finally brought to light.