One Day, I'll Break the Seal...

Snake–Goat–Monkey–Pig–Horse–Tiger.

That was...

After a clash, Kagami Uchiha rapidly formed Hand Seals, startling the teacher into shouting.

"All students!! Scatter!!!"

Kakashi's pupils shrank, his hands moving swiftly.

"Fire Release—Great Fireball Technique!"

"Earth Release—Earth Flow Wall!"

The Great Fireball Technique was the signature ninjutsu passed down through the Uchiha Clan for generations, and it was widely known throughout the Ninja World.

Nearly every Uchiha learned the Great Fireball Technique as their first ninjutsu.

After hearing from Obito that Kagami Uchiha knew Fire Release, Kakashi had assumed he could use the Great Fireball Technique. That was why he had prepared a countermeasure the moment Kagami Uchiha began forming Hand Seals.

BOOM!!

The ferocious fireball smashed through the earthen wall!

Kakashi had responded correctly, but unfortunately, he had underestimated the strength of Kagami Uchiha's ninjutsu.

"Damn it!"

The Chunin teacher instantly sensed that something was wrong and used the Body Flicker Technique, intending to save Kakashi.

BANG!!

Before the flames could sweep over him, Kakashi's body exploded into a cloud of smoke, leaving only a withered log behind.

The Substitution Technique!

When had he...?!

BANG!

Kagami Uchiha turned and bent down, punching Kakashi as he burst from a hole in the earth.

The fierce taijutsu battle began anew.

"This... This is already a real battle between ninjas, isn't it...?" Obito, forgotten in a corner, muttered, his eyes filled with disbelief.

And a trace of unwillingness.

The Uchiha Clan worshiped strength. He often heard his clansmen praising Kagami, but whenever their gazes fell on him...

Nohara Rin timely offered him some comfort, patting Obito on the shoulder and smiling. "Obito is amazing too. I believe you'll become an outstanding ninja sooner or later!"

"Yeah!"

The gloom that had just risen in Obito's heart was dispelled by the girl's smile.

So Lord Madara really was good at judging people. As long as Nohara Rin remained alive, Obito would never awaken the Mangekyo.

He really ought to thank Lord Madara for his blessing, Obito!

"Earth Release—Earth Wave!"

Among his peers, Kakashi's Chakra reserves were already absurdly high.

This was an inferior Earth Release technique. The ground rippled like waves, disrupting Kagami Uchiha's movements.

"Among those under ten who have fought me, Kakashi, you're the strongest."

Kagami Uchiha leaped between the waves, a faint smile on his face from beginning to end.

"But I'm already tired of this game."

"Your purity is still lacking."

The moment he finished speaking, a streak of crimson reflected in Kakashi's eyes.

An utterly terrifying blood-sea demon crashed into his mind, instantly causing both his body and spirit to freeze.

Genjutsu Sharingan—Sukuna Special Edition.

The Double Tomoe Sharingan slowly appeared in Kagami Uchiha's eyes as he walked toward Kakashi step by step.

His hand pressed against the hilt of Sode no Shirayuki.

SMACK!

The teacher's palm pressed against his shoulder. His voice trembled slightly. "That's enough... You've won, Kagami."

He lowered his head and saw the crimson in Kagami Uchiha's eyes, then swallowed.

He had indeed heard that the Uchiha Clan had a five-year-old genius who had awakened his eyes... But he had awakened the Double Tomoe Sharingan right away?!

Perhaps he had awakened even earlier... and evolved to the Double Tomoe Sharingan by the age of five...

Either possibility was horrifying enough.

The entire arena fell deathly silent.

Watching Kagami Uchiha fight Kakashi, they had not never considered that Kagami might win. However...

They had been completely unable to understand how Kagami Uchiha had won!

Only when Kagami Uchiha swept his gaze over everyone and that crimson light fell into their eyes did they understand.

Even children knew what this was.

One of the Three Great Dojutsu, the strongest manifestation of the Uchiha Clan...

The Sharingan!!

Kagami Uchiha was very satisfied by the little brats' awe.

That was how it should be. The Uchiha did not need bonds. They only needed to grovel and look up at him.

Even without the Sharingan, he was confident he could defeat Kakashi.

But why hide it?

A person's personality was influenced by their environment, education, and other factors. There was another important part as well... the body.

Bad lungs made one prone to sadness.

Bad liver made one prone to irritability.

A bad stomach made one prone to complaining.

The Uchiha had good brains. Acting arrogant was only natural!

Dressing richly only to travel in secret? That would make him Uchiha Fugaku.

The factors shaping Kagami Uchiha's personality included the influence of the Uchiha Clan's hereditary traits, but the most important factor was still his own mentality.

In his previous life, he had no parents, family, or friends. If he had been born in ancient times instead of the modern era, he would have been treated as a dangerous destabilizing factor and trained into a death warrior.

But here...

Where the sea ends, the sky becomes the shore.

When one reaches the mountain's summit, one becomes the peak!

The crimson faded from his eyes, and Kagami Uchiha said calmly, "My name is Kagami Uchiha. I hate challenges from people who don't know their own limits, I hate being disturbed while eating, and I hate Uchiha Obito."

"That's all."

Uchiha Obito: "..."

--

Inside the Hokage Office, the smoke concentration had already exceeded safe limits.

Sarutobi Hiruzen watched the scene in the Crystal Ball, his brows tightly furrowed.

This child... needed proper guidance.

He summoned his secretary and said solemnly, "Jiraiya has been teaching Minato recently, hasn't he?"

"Yes, Hokage-sama. They're currently training in the Forest of Death."

After pondering for a moment, Sarutobi Hiruzen carefully considered it and decided not to act so quickly.

He would let that child remain in the Ninja Academy for now. Perhaps interacting with his peers would change his personality.

If that failed, he could have that little sun shine on this Uchiha brat.

In Minato, Sarutobi Hiruzen saw a light capable of uniting everyone. It was even more dazzling than his talent for ninjutsu.

--

If not for his performance on the training ground, Kagami Uchiha actually looked much more well-behaved than Obito.

He neither made noise nor slept during class.

Of course, when the teacher called on him to answer a question, he simply ignored him.

Kagami Uchiha had learned everything taught at the Ninja Academy long ago. Forget Water Walking and Tree Climbing—he had nearly finished learning Chakra Shape Manipulation in the clan's courses.

The limit of Chakra Shape Manipulation was the Rasengan. He wondered whether Namikaze Minato had developed it yet.

This was also the problem Kagami Uchiha was currently working to overcome. He had the complete course and could work backward from the standard answer.

If he used it before Namikaze Minato, then the Uchiha Clan would be the authentic producer of the Rasengan.

Namikaze Minato?

If you weren't Jiraiya's disciple, I'd dare sue you for plagiarism!

Of course, all of this depended on Kagami Uchiha developing the Rasengan first.

Kagami Uchiha sat quietly, his consciousness already immersed in the Mental Space.

Before the enormous gate, Kagami Uchiha sat down and began cultivating.

The Rasengan had three stages: "rotation," "power," and "maintenance."

Kagami Uchiha was currently stuck at the third stage.

The Rasengan was like a miniature typhoon gathered in the palm. The hardest part was maintaining that state.

"Brat... what exactly is happening outside... And what's the deal with those eyes of yours...?"

The Genjutsu Sharingan infused with Sukuna's Cursed Energy had been one of Kagami Uchiha's experiments.

The results were quite good. If the Head Instructor had not intervened, Kakashi would have remained standing there until tomorrow morning.

That had also allowed Sukuna to sense a little of what was happening outside.

Chakra was the perfect fusion of Spiritual Energy and physical energy, while Cursed Energy originated from negative emotions and was merely a form of Spiritual Energy.

From Sukuna's perspective, practically every one of those brats outside possessed Cursed Energy!

He had even sensed several powerful sources of Cursed Energy nearby, no weaker than a top-tier cursed spirit user.

The density of such strong individuals was far too abnormal...

Most importantly... this was the first time he had directly sensed Kagami Uchiha's eyes.

Although he did not currently feel that they could cause him any harm...

To use an analogy, he was like a wild bull, while the Sharingan represented a lion... No, comparing it to a dragon egg was more appropriate.

He had an inexplicable premonition that if those eyes hatched, they could easily shatter his immortal body!

In his spare time, Kagami Uchiha glanced at him and said calmly, "That's why it's so annoying."

"Other people either get their cheat abilities all at once or have a system issuing them missions. Meanwhile, all I have is you, this mediocre, half-baked thing."

"Brat! What did you say?!"

"Quiet, Sukuna."

"This world is far more dangerous than you imagine. Creatures capable of killing you are everywhere. Put away that pointless recklessness."

"Listen to me obediently, and perhaps you'll have a chance to appear as my Summoning Beast."

Sukuna roughly guessed what a Summoning Beast was. His icy voice rang out. "Before reaching the top of the world, I don't care about wagging my tail and begging."

"Compared to me, you're the one who doesn't know how high the heavens are or how deep the earth is. With this tiny amount of strength, you dare expose yourself before other powerful beings."

"I'm different from you."

A smile touched Kagami Uchiha's lips, and the mass of Chakra in his hand showed signs of becoming stable.

"If I die, it means I'm nothing special after all."

"I'll never beg and grovel for survival like you."

His crimson eyes met the God of Slaughter in the darkness.

"I know very clearly how insignificant I am. But does that mean I should curl up and hide?"

"Knowing something is impossible and doing it anyway, Sukuna—you've lost the most important instinct of humanity. You're nothing more than a relatively powerful beast."

"That's why you can only serve as a mount, driven by me!"

"Brat, you're merely a mortal borrowing this unknown prison to restrain me. Don't make such grand boasts."

Kagami Uchiha leaned closer to the seal, the corners of his lips curling upward.

"Sukuna, one day, I'll break the seal..."

"And put a Dog Leash on you."