When will the village's attention be entirely drawn elsewhere? Kei had already calculated the flawless window: the Night of the Uchiha Clan Downfall.
He planned to launch his decapitation strike against the Hyuga Main House on the exact same night the Uchiha compound burned. While Hiruzen Sarutobi, Danzo, and the rest of the noble clans were paralyzed by the catastrophic civil war erupting in the Uchiha sector, they would be entirely blind to the coup occurring on the opposite side of the village.
By the time the Hokage finally realized what was happening, the elders would already be dead, and the Caged Bird Seal would be broken. A village reeling from the loss of its police force and its most powerful clan would not possess the political capital or the military strength to wage a second war against a newly unified, hostile Hyuga clan.
It was a perfect, bloody checkmate.
After a grueling day of sailing and high-speed travel, Kei and his two lieutenants finally breached the Konoha perimeter late at night.
Because the Zero-Tails was currently undergoing its violent, metamorphic upgrade, microscopic fluctuations of its dark chakra were passively bleeding into Kei's own network. While the leakage was far too subtle for a standard ninja to detect, Kei refused to take any risks with the Yamanaka or the ANBU sensory divisions. To ensure absolute operational security, Kei decided to temporarily suspend all clinical consultations and keep the Sanatorium closed until the beast finished digesting its power.
However, the moment Kei crossed the threshold into the dark, quiet Sanatorium, his sensory web flared. The facility's external perimeter wards had been violently tripped.
Seconds later, Haru blurred into the main hall. "Kei. An unidentified shinobi carrying a wounded passenger has just breached the outer wall. They are sprinting directly toward the consultation building."
"Is it a civilian patient experiencing a midnight emergency?" Kei asked smoothly. "Intercept them and instruct them to visit the central hospital. We are closed."
"I don't believe so," Haru shook her head, her Byakugan flaring. "The chakra signatures are specific. The man is carrying the orphanage director you spoke with a few days ago."
Kei paused, a brilliant, predatory smile slowly spreading across his face. "Ah. It appears our psychological investment has yielded a magnificent dividend."
He picked up his white cane. "Come, Haru. I believe we are about to welcome a highly valuable new member to our alliance."
Haru didn't understand why Kei was radiating such absolute confidence regarding a perimeter breach, but she knew the doctor never made a tactical error. She fell into step behind him as they walked out into the cool night air.
The Sanatorium grounds were bathed in pale moonlight. Leaning heavily on his cane, Kei 'watched' the silver-haired youth sprinting frantically across the manicured lawn.
Yakushi Kabuto's face was twisted in absolute, panicked desperation. He kept throwing terrified glances over his shoulder at Nonō, checking her fading pulse.
Because he had been forced to run at top speed for nearly twenty-four hours straight, the bleeding had resumed. Nonō's high fever had spiked to a critical level. She was dying on his back. Kabuto knew he was entirely out of options; he could only pray to the gods that his desperate gamble on the blind doctor would pay off.
Spotting the two figures standing calmly on the steps of the consultation building, Kabuto realized they were waiting for him. He didn't hesitate; he charged straight toward them.
Before Kabuto could even open his mouth to beg, Kei spoke, his voice ringing with absolute, commanding authority.
"Follow me immediately. The underground laboratory possesses state-of-the-art life support equipment."
Without waiting for the shocked boy to reply, Kei and Haru turned and walked swiftly toward the hidden entrance of the surgical ward.
Kabuto gritted his teeth and sprinted after them. He had spent the entire agonizing run mentally preparing a dozen different, desperate arguments to convince the civilian doctor to harbor fugitives from Root. He had fully expected to be turned away. He had never imagined the doctor would instantly shield them without asking a single question.
Ten minutes later, deep within the sterile, heavily sealed laboratory, Kabuto stood frozen outside a private recovery room. Through the reinforced glass, he watched Nonō resting peacefully inside a high-tech medical pod, an IV drip feeding life-saving fluids directly into her veins.
Listening to the steady, rhythmic beeping of the heart monitor, the suffocating terror that had gripped Kabuto's chest for the past day finally shattered. He slumped against the wall, letting out a long, ragged sigh of pure relief.
The soft, rhythmic tap-tap-tap of a wooden cane echoed down the steel corridor. Kabuto instantly straightened his posture, taking a deep, steadying breath.
Kei pushed the heavy door open, carrying a warm, steaming bento box. "I know you are consumed with worry for the Director, but your own chakra reserves are completely depleted. You must take care of yourself."
Kabuto looked at the offered food, his stomach twisting with anxiety. "I appreciate the gesture, Doctor Kei, but I need to monitor her vitals..."
"Do not worry. The Director is completely stabilized," Kei promised, his voice radiating absolute, unshakable certainty. "No one can threaten her down here. And you will be entirely useless to her if you collapse from starvation."
Kabuto nodded slowly, accepting the heavy meal box. Terrified that the sound of his chewing might disturb her rest, he stepped out into the hallway and began to devour the rice and meat with frantic, animalistic speed. He hadn't stopped to eat or drink since the ambush in the canyon. He was starving.
Kei stood quietly in the corridor, leaning on his cane, patiently waiting for the boy to finish.
Scraping the box clean in seconds, Kabuto wiped his mouth and looked up at the blind doctor. His dark eyes were swimming with profound, absolute gratitude.
"Doctor Kei... thank you," Kabuto whispered, bowing so deeply his forehead nearly touched his knees. "Thank you for saving her life. Thank you for saving mine. If it hadn't been for your warning... I truly do not know what I would have done."
"Please, raise your head. I was simply doing my duty as a healer," Kei smiled warmly, waving the gratitude away. "You must be Kabuto. The Director spoke of you with immense love. If you are comfortable, could you explain exactly what transpired?"
Kabuto didn't hold a single detail back. He recounted the flawless assassination trap Danzo had orchestrated, the brutal fight in the canyon, and the horrifying moment his mother's mask fell away.
"If you had not warned her about the forged photographs, she never would have stopped fighting," Kabuto finished, his voice trembling. "Because of you, she finally recognized my face."
Kei maintained his gentle, sympathetic smile. "In truth, I simply found the physiological discrepancies in the photographs highly suspicious. I never truly believed Danzo Shimura would stoop to such a depraved, monstrous tactic."
"That man..." Kabuto's voice dropped into a lethal, venomous hiss. A flash of pure, unadulterated hatred ignited in his eyes. "I swear to you, I will not let him get away with this!"
Kei raised a hand, gently gesturing for the boy to lower his voice. "I intimately understand the fury burning in your chest right now, Kabuto. But matters of such gravity require absolute, cold calculation."
"Right now, your only priority should be ensuring the Director's full recovery. Do you not agree?"
Kabuto fell silent for a long moment, struggling to suppress his killing intent. Finally, he nodded. "I understand. But I cannot just walk away from this."
"If Danzo had only ordered my execution, I would have accepted it as the cost of being a spy," Kabuto said, his fists clenching so tightly his knuckles turned white. "But he used her. He manipulated her love, and he tried to force a mother and son to butcher each other in the dark. I will make him bleed for that."
"I know you are consumed by rage, Kabuto. And I know the reality I am about to state will be incredibly difficult for you to swallow."
Kei's sightless eyes 'locked' onto the boy's face. "But have you actually calculated the tactical reality of your threat? What can you possibly achieve against the Commander of Root with your current power?"
"Perhaps, if you are lucky, you might assassinate a handful of his lower-ranking subordinates. But that will not harm Danzo in the slightest."
"Conversely, if you launch a reckless, emotionally driven vendetta without a flawless strategy, you will inevitably be captured and tortured. And your failure will instantly paint a target on the Director's back."
Kabuto lowered his head, staring at the steel floor. He knew the doctor's logic was absolute. His current strength was entirely insufficient to challenge a titan like Danzo. A rash, suicidal attack wouldn't just get him killed; it would guarantee his mother's execution.
But knowing exactly what Danzo had done to them, and being told he simply had to swallow the injustice and hide like a rat... it was an agonizing, bitter pill.
Sensing the crushing despair settling over the boy, Kei's voice softened into a tone of profound, conspiratorial warmth.
"Kabuto... may I call you Kabuto? I wonder if you are familiar with a piece of ancient wisdom that perfectly mirrors your current agony."
Kabuto shook his head slightly, looking up at the doctor.
"It is not that the heavens deny us our vengeance; it is simply that the hour of reckoning has not yet arrived," Kei quoted, his expression turning deadly serious.
"Sometimes, when we desire to achieve the impossible, we must learn the excruciating art of patience."
"We must retreat into the shadows. We must forge a flawless plan. And simultaneously, we must ruthlessly elevate our own power. Only when our fangs are sharp enough to pierce the leviathan's armor do we strike."
"Executing a perfect, absolute revenge a decade from now is infinitely more satisfying than dying a meaningless death today out of sheer anger."
Kabuto took a deep, shuddering breath. His clenched fists slowly relaxed. He digested the brutal philosophy, but the reality of his own limitations remained.
"Your logic is correct, Doctor," Kabuto admitted, his voice hollow with defeat. "But what can I realistically do? The gap between my power and Danzo's political empire is an ocean. I can never cross it."
Although he was a brilliant medical ninja and a highly gifted spy, he was fundamentally outmatched in raw combat. Because he had been raised as a disposable asset in the orphanage, almost every jutsu in his arsenal had been taught to him by Root instructors. He had hit his ceiling. Even if he trained until his bones broke, he would never possess the apocalyptic firepower required to threaten a monster like Danzo.
It was a profound, suffocating despair: to possess an absolute, burning desire for revenge, but to be entirely, physically powerless to execute it.
Kabuto's agony was painted clearly across his face.
Kei allowed the silence to stretch for a long, heavy moment. Then, he finally offered the poisoned apple.
"It would naturally be an absolute impossibility for you to burn Danzo's empire to the ground alone, Kabuto."
Kei tilted his head, his smile returning, sharp and dangerous.
"But... what if you didn't have to fight alone? What if you possessed a syndicate of incredibly powerful, like-minded monsters standing by your side?"
Kabuto froze. He stared at the blind doctor, his mind completely failing to process the casual, terrifying implication of the words. He found it entirely unbelievable.