The following day at the Academy was nothing short of torture for Naruto.
He occupied his usual seat by the window, mechanically copying down Iruka's lectures. Outwardly, he was the very picture of calm—the embodiment of a "solid average" student. But inside, tension vibrated like a plucked wire.
Every time the door opened, he instinctively braced himself, expecting them to come for him.
Every time Hinata Hyuga glanced in his direction—fearful and guilty—he felt a prick of cold, sticky paranoia.
Exposed.
His primary weapon of survival—invisibility—had cracked.
Byakugan... The thought haunted him relentlessly. He had been an idiot to train in an open area like a carefree child. He hadn't accounted for Dojutsu.
Immediately after class, Naruto didn't go home. Instead, he headed straight for the Konoha Public Library. He needed a solution, and he needed it fast.
Buried in the archives, he ignored the history and technique sections. He was interested only in chakra theory and anything related to eyes.
The answer was found in an old, dusty report from the Second Great Shinobi War, titled Threats of Dojutsu and Countermeasures.
"...the ability to see the circulation system (Tenketsu) in minute detail..."
"...360-degree perception..."
"...distinguishes chakra types by 'color' and 'form'..."
Naruto went cold, gripping the edges of the book.
Distinguishes chakra types.
Hinata hadn't lied. The Byakugan truly saw the white Qi as a separate, alien energy.
This meant that a simple "Suppression Seal" from the Uzumaki scrolls wouldn't be enough. If he merely dimmed the Qi, making it invisible to normal sensors, the Byakugan would still notice the unnatural void. Or worse, it would see two distinct streams: the blue and the ghostly white.
That was even worse. It was a clear sign that he possessed something unique and was trying to hide it. Anomalies attracted attention.
He didn't need to hide the Qi. He needed to camouflage it.
...
That evening, after ensuring he wasn't being tailed, Naruto descended into the Sanctuary. Taking scrolls outside was forbidden—the risk of a dorm search was too high. Here, under the protection of ancient walls, it was safe.
He unrolled The Art of Calligraphy and Mixing. He had previously used it to practice his handwriting; now, he searched for hidden meaning.
And he found it.
Not a full-fledged technique, but a theoretical concept disguised as a chapter on "Mixing Inks" to create the correct shade.
Color Overlay.
The essence was simple. Instead of hiding the Qi, he needed to wrap it in the thinnest possible layer of his own Chakra. Use the blue energy as "paint" to coat the pure white stream.
If done correctly, the Byakugan wouldn't see two sources. It would see one—a strange, dense, but undeniably blue stream.
Yes, it would look unusual. But the oddity could be written off as his status as a jinchuriki, the Fox's influence, or his famously "bad control."
"Bad control" was a flaw. Flaws were forgiven. Secrets were not.
The task seemed incredibly difficult, requiring simultaneous control over two conflicting energies.
Ha! The irony! The Fox's voice thundered in his head, dripping with poisonous mockery. You spent months scrubbing yourself clean of my 'dirty' chakra, trembling over every speck on your soul. And now you intend to voluntarily smear your precious Qi in that very same filth? You are pathetic, brat. You're walking in circles.
Naruto didn't answer immediately. His knuckles turned white from tension.
I do what is necessary for survival.
Coward! the demon barked. His pride was wounded by the very idea of masking power. Instead of hiding like a rat, you should have burned that Hyuga girl's cursed eyes out! Or simply used my power! One surge—and no one in the village would dare look at you askance again!
And I would be locked in a cage for the rest of my days, the jinchuriki cut him off coldly. Or killed as a threat. I will use your power, Fox. But as a shield, when it benefits me. Not as a leash by which I am dragged to the executioner's block.
You... ruin the very essence of power! The Kyubi growled and fell silent, retreating into the depths of the subconscious.
Naruto set the scroll aside and sat in the center of the room.
Color Overlay.
Closing his eyes, he activated the Qi flow. The white, calm, cool energy filled his channels, bringing clarity.
Then, he reached for the other energy. The blue, hot, chaotic Chakra bubbling around the seal.
Careful. A thin layer. Like a film.
He tried to take a grain of Chakra and wrap it around the stream of Qi.
The moment the two energies touched, his body rebelled.
It was an attempt to mix oil and fire. The chaotic Chakra, upon contacting the ordered structure of the Qi, reacted with an explosion.
BAM!
Naruto was thrown backward. Flying a couple of meters, he slammed back-first into the stone wall. The air was knocked from his lungs.
He slid to the floor, coughing. His insides burned; his channels pulsed with agony.
It wasn't just difficult—it was physically unbearable. His body rejected the unnatural fusion. The Chakra was too wild, the Qi too dense.
A quiet, mocking chuckle sounded in his head.
I told you, brat. You're trying to plug a volcano with a cork. Your body is too fragile for such games.
Naruto grit his teeth, forcing himself to sit up. His head was spinning.
The Fox was right. About one thing.
His body was weak. His channels could withstand Qi, but his flesh couldn't withstand the pressure of the conflict between the two energies.
That means, he thought, wiping blood from his split lip, I need to become tougher. Not just to mix them, but to force the Chakra to submit, and the body to endure.
The Early Stage of Body Tempering—skin and muscles—was not enough. He needed to strengthen the frame. To reach the bones.
He resumed his meditation posture. This time, he didn't try to mask anything.
Back to basics.
He needed the Middle Stage of Body Tempering.
Naruto began to forcibly drive the dense Qi into his flesh, ignoring the sharp, aching pain.
Before he could hide his power, he had to become strong enough to survive the process of concealment itself.