Naruto: If Sasuke Awakens Entry System

In the corridor of a residential building.

Kisame said coldly, "Kyuubi boy, follow us obediently, or don't blame me if you lose a leg."

Naruto retorted angrily, "You jerk, dream on if you think you can catch me!"

He attempted to summon the power of the Nine-Tails, but Kisame was quicker, swinging his massive sword, Samehada, to absorb the Nine-Tails' chakra and disrupt the summoning.

As capture seemed imminent, Naruto cursed his own powerlessness.

Just then, Sasuke's voice echoed through the corridor, "Long time no see, Uchiha Itachi!"

His blood-red Sharingan, with its three tomoe, locked onto Itachi.

Kisame looked at Sasuke curiously, "Itachi, this kid seems to be from your clan..."

Itachi replied indifferently, "He is my brother."

Naruto was shocked and quickly warned, "Sasuke, be careful, they're both really strong!"

But Sasuke didn't hear him.

His entire focus was on Itachi. "Since that day, I've lived in hatred, all for this moment..."

Swish, swish, swish—his hands moved rapidly, forming seals.

Chou-Mao-Shen.

Lightning crackled in his palms, fueled by his hatred.

Sasuke's voice was filled with venom, "Itachi, I... want to kill you!"

"Lightning Style: Chidori!"

Instantly, the high-pitched chirping of birds pierced the air.

Itachi's expression remained blank, "Kakashi's move, Sasuke. It seems you've improved a bit, but you're still too young."

Sasuke sneered silently, launching himself forward with the speed of lightning.

Kisame was taken aback, "So fast!"

In a heartbeat, Sasuke's Chidori pierced through Itachi's heart, a flicker of surprise in Itachi's eyes.

Sasuke's face darkened slightly, his Sharingan shifting to the corner, "Don't underestimate me; my Sharingan can see through illusions!"

Gah, gah—

The Itachi pierced by Chidori dissolved into a flock of crows, vanishing without a trace, while the real Itachi emerged from the shadows.

Itachi's expression shifted slightly, "My foolish brother, bravery isn't always wise. You're not my match yet."

"Stop talking nonsense and fight me!"

Bang!

The wall shattered.

Sasuke and Itachi began a relentless chase.

Kisame shrugged, "I'm unlucky to have Itachi as a teammate. Let's go, Nine-Tails boy!"

Just then, Jiraiya appeared, "You're not going anywhere!"

Kisame's eyes narrowed, and he abandoned his pursuit of Naruto, retreating instantly.

Naruto was anxious, "Pervy Sage, let's go help Sasuke!"

"Naruto, calm down. What can you do right now?"

Naruto, frustrated by his own helplessness against Itachi and Kisame, punched the wall in anger, "Damn it, why can't I do anything!"

Jiraiya reassured him, "Don't worry, Kakashi and the others are on their way..."

Meanwhile, Sasuke chased Itachi to a small river in the forest.

Itachi stood on the water, "Sasuke, stop chasing me. I've told you, you're not strong enough yet."

Sasuke clenched his fists, "Even so, I will kill you!"

Itachi sighed deeply, "It seems you've forgotten the pain of that night. Let me remind you of your powerlessness, my foolish brother..."

At that moment, Kakashi, Guy, and Kisame arrived.

Kisame drew Samehada, "It's not polite to interrupt a family reunion!"

The three stood on guard, ready to support their companions if needed.

Guy asked, "Kakashi, does Sasuke stand a chance?"

Kakashi shook his head slightly, "Itachi is a genius of the Uchiha clan, and Sasuke is growing rapidly, but the outcome can only be known after the fight."

Kisame smirked, knowing Itachi's strength better than anyone present. He believed Itachi would win in less than a minute.

Sasuke, consumed by hatred, took the initiative, "Fire Style: Great Fireball!"

With the power of his Sage Body, the Great Fireball's intensity surged.

Itachi's expression shifted, but he calmly countered with his own Great Fireball.

Boom!

The flames scorched the river's surface, creating the illusion that the water might evaporate.

The next moment, a hot wind mixed with steam swept over them.

Kakashi exclaimed, "What incredible power! Is this really just a C-rank jutsu?"

Kisame was shocked, "That kid's fire style can match Itachi's?"

Boom!

The clash ended.

Sasuke was stunned. Even with the Sage Body, he couldn't overpower Itachi. It wasn't the Sage Body's fault; he simply wasn't strong enough yet!

Itachi taunted, "What's wrong, Sasuke? Where's your fire? Is this all you've got?"

Sasuke, furious, shouted, "Damn it, die!"

He hurled shuriken and charged at Itachi with blinding speed.

The two clashed fiercely on the water.

Sasuke unleashed everything he had, bombarding Itachi with Fire, Water, and Lightning Styles.

Kakashi was astounded. In just a few days, Sasuke had grown to a level comparable to his own. It was unbelievable!

Kisame watched in shock. Sasuke's Fire Style was formidable, his Water Style impressive, and he could wield Lightning Style too. Even his taijutsu wasn't weak. Itachi shouldn't be this strong at his age, right?

Bang!

Sasuke and Itachi separated, standing on the water, staring each other down.

By now, Sasuke had calmed slightly.

He knew he wasn't Itachi's equal, but he couldn't let him escape!

Even if he couldn't win, he had to fight!

Fight to the death!

This was Uchiha Sasuke's resolve!

Itachi's eyes seemed to glimmer with interest, "Sasuke, you've truly grown stronger."

"It's a pity you haven't awakened eyes like mine yet..."

With a swift motion, Itachi revealed his Mangekyō Sharingan.

Sasuke narrowed his eyes, "Mangekyō Sharingan..."

Kakashi's expression changed drastically.

Kisame was astonished, "Itachi's using the Mangekyō?"

Everyone held their breath, not wanting to miss what came next.

Suddenly, Itachi's presence intensified, his gaze fixed on Sasuke, "Mangekyō Sharingan: Tsukuyomi!"

As his words fell, silence enveloped the world, draining it of color.

Sasuke felt himself transported to another realm.

Itachi's voice echoed, "In the Tsukuyomi world, time, space, everything is under my control, like this..."

The inhuman torture began.

72 hours later in the Tsukuyomi world.

Sasuke returned to reality, realizing only a moment had passed!

But the torment he endured in Tsukuyomi left him physically and mentally exhausted.

Itachi could have ended his life, but why didn't he?

"Why, why not kill me?"

In response to Sasuke's question, Itachi replied calmly, just as he had on the night of the massacre years ago, "You're not worth killing yet."

"Bastard!"

"Don't rush to die. I'll come for you in three years. Then..."

Sasuke finally lost consciousness completely.

A few days later, at Konoha Hospital.

Sasuke hadn't fully recovered when he discovered the Anbu had come to arrest him.

Simultaneously, rumors spread through the village—"Uchiha Sasuke is an accomplice of Orochimaru and involved in the Third Hokage's death."

The air was thick with conspiracy...