Naruto: If Sasuke Awakens Entry System

Warning: Sasuke is not a time traveler, but a native of the Naruto world.

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Konoha Village. 11 PM.

Sasuke finished his training and returned to his residence. He sat on the bed, gazing out the window at the night sky. It was pitch black, mirroring the darkness of his future.

On the night of the massacre, Itachi, his own brother, had killed Sasuke's parents and countless members of their clan. Since then, Sasuke harbored a deep hatred for the brother who had taken everything from him.

"Uchiha Itachi, your fate is sealed—only death awaits you!"

Although Sasuke longed to kill Itachi immediately to avenge his parents and clan, the vast difference in their strength left him secretly despising his own powerlessness.

[Ding, host detected, entry system activated]

[Ding, defeating and killing ninjas will have a chance to get entry rewards]

"An illusion?"

Sasuke quickly disrupted his own chakra: "Dispel!"

[Ding, novice gift packs are issued according to the host's characteristics]

[Ding, get entry: One Tomoe Sharingan (purple ★☆☆), do you want to fuse?]

Sasuke was taken aback. He couldn't dispel it? Wait, all five senses were normal—wasn't it an illusion?

Soon, Sasuke made up his mind. To gain the power to avenge Itachi, he was willing to take the risk!

"Fuse!"

As soon as he spoke, Sasuke felt a cold sensation in his eyes. Then, he saw his reflection in the mirror, now with a pair of blood-red eyes. It was the symbol of the Uchiha clan—the Sharingan.

Sasuke clenched his fists: "I've awakened the Sharingan?"

He was filled with excitement because he finally saw a glimmer of hope for revenge.

"Entry system, whoever you are, as long as you can help me get my revenge, I am willing to give you my life!"

However, the system did not respond. Sasuke guessed that the entry system might not have independent consciousness, and then began to explore the changes in himself after awakening the Sharingan.

His dynamic vision was greatly enhanced, and the buzzing flies in front of him seemed to move in slow motion, every detail crystal clear. His field of vision had doubled, allowing him to see in the dark to some extent.

Finally, to his surprise, his chakra had increased significantly, and he no longer feared using ninjutsu in battle as before.

[Chakra: 1000 microcal (ordinary Chunin level)]

[Entry: ■■ (unknown), One Tomoe Sharingan (purple ★☆☆), Fire Style: Phoenix Flower Jutsu (blue ★), Fire Style: Great Fireball Jutsu (green), Uchiha Throwing Technique (blue ☆)]

Note: ☆ indicates that the star can be upgraded, and ★ indicates that the star has been upgraded.

Sasuke's confidence soared: "Itachi, the day we meet again is not far off."

Suddenly, Sasuke slapped his forehead: "I almost forgot—if I fail the test tomorrow, I'll be sent back to the ninja academy. I'm not worried about myself, but I'm afraid Naruto, that idiot, will hold me back."

The night passed without a word.

The next day, Sasuke arrived at the meeting place early. Soon, Sakura and Naruto arrived one after another, but Kakashi was nowhere to be seen.

The sun climbed higher in the sky.

Naruto grumbled: "Why hasn't that masked guy shown up yet?"

Sakura smiled: "Naruto, be careful. If Kakashi-sensei hears you, he might punish you."

Naruto looked defiant: "I'm not scared," he said, turning to Sasuke. "Hey, why are you acting like a goody-two-shoes? Come and complain with me!"

Sasuke, focused on becoming stronger and seeking revenge, had no interest in fooling around with Naruto.

He glanced at Naruto calmly: "Not interested."

Sakura: "Naruto, don't lead Sasuke astray!"

Naruto was undeterred: "Sasuke, I've learned a super powerful move recently. Do you dare to compete with me?"

Sasuke's eyes lit up. Yes, defeating ninjas could earn him entries, and with entries, he could quickly grow stronger. But what valuable entries could Naruto, the class dunce, possibly have?

Let's find out.

[■■ (Unknown), Nine-Tails (Gold ★★★★★, Sealed), Uzumaki Constitution (Purple ★★★), Multiple Shadow Clones (Purple ★★), Color...]

Damn it! Naruto actually had such incredible potential? Wait, Nine-Tails—Naruto is the Nine-Tails' Jinchūriki?

Sasuke was shocked. No wonder the villagers sometimes cursed Naruto as a demon fox. It turns out there was truth to the rumors.

At this moment, Naruto was feeling smug: "Sasuke, if you're scared, just admit it. I won't force a coward, haha..."

No matter what Naruto had, an entry delivered to his doorstep shouldn't be missed!

Sasuke: "Alright, let's compete."

Naruto rubbed his hands together: "Sakura, watch my amazing performance."

Sakura was busy cheering for Sasuke and ignored Naruto.

Naruto was annoyed: "Sasuke, I'll beat you to a pulp. Here goes, Multiple Shadow Clones!"

As soon as he spoke, a horde of Narutos charged at Sasuke.

Sasuke's eyes narrowed. Multiple Shadow Clones were forbidden techniques. When did Naruto learn something of this caliber?

This battle couldn't be taken lightly. He was determined to win the entry.

Whoosh, whoosh, whoosh, Si-Wei-Shen-Hai-Wu-Yin.

"Fire Style: Great Fireball Jutsu!"

In an instant, a fireball with a two-meter diameter shot towards Naruto's clones.

Bang, bang, bang, with a burst of white smoke, Naruto's clones were all dispelled in the blink of an eye.

Sakura wiped the cold sweat from her forehead: "Sasuke's fire style is so powerful. Wait, where's Naruto?"

Suddenly, Sasuke spun around and kicked Naruto, who was attacking from behind.

Naruto fell to the ground, clutching his stomach: "Sasuke, let me catch my breath before we continue."

Sakura was exasperated: "Naruto, if you lose, just admit it. It's rude to play tricks like this."

In truth, Sasuke hadn't won easily. If he hadn't awakened the Sharingan to observe Naruto sneaking up behind him, he might not have subdued him in one move.

However, a win was a win, and now it was time for the reward.

[Ding, defeat Uzumaki Naruto, drop entry: Uzumaki Constitution (purple ★★★), drop cooldown: 30 days]

Sasuke was a bit disappointed. He had hoped to exploit Naruto, a high-quality target, repeatedly. But the system had a cooldown to prevent such loopholes.

[Uzumaki Constitution (purple ★★★), after fusion, it can greatly increase vitality and chakra limit, do you want to fuse?]

Fuse!

[Ding, trigger mutation when fused with own blood, obtain new entry: Incomplete Sage Body (gold ☆☆☆)]

Almost simultaneously, Sasuke felt a surge of heat in his eyes.

[Ding, entry upgrade, One Tomoe Sharingan (purple ★☆☆) → Two Tomoe Sharingan (purple ★★☆)]

It was incredible—the Sharingan had evolved automatically!

That wasn't all; his chakra surged, and his body felt brimming with strength.

[Chakra: 3000 microcal (special Jonin level)]

[Entries: ■■ (unknown), Incomplete Sage Body (gold ☆☆☆), Two Tomoe Sharingan (purple ★★☆), Fire Style: Phoenix Flower Jutsu (blue ☆), Fire Style: Great Fireball Jutsu (green), Uchiha Throwing Technique (blue ☆)]

In just one day, after awakening the entry system, his strength had transformed dramatically.

Thinking of this, Sasuke couldn't help but smile.

At that moment, Kakashi's lazy voice drifted over: "Sorry, I'm late because I was helping an old lady cross the road..."