Itachi was brainwashed like crazy as the Third Generation and others constantly instilled in him the idea that only with the existence of everyone can the small family survive.
The disbelief of his tribe members, the guidance of the Third Generation, and the support of Shisui made the young boy believe that he was right.
Perhaps even Shisui did not realize Itachi's extreme thoughts, or there was another factor that was not taken into consideration, that was Sasuke.
As a Brocon, Itachi tends to behave unusually when it comes to Sasuke, which was the last straw that broke the camel's back and led to the tragedy of Uchiha.
If Naruto had not saved some of the Uchiha people, the Uchiha clan would probably have disappeared from the ninja world a hundred years later. This is not surprising in the ninja world.
Even the Senju were almost forgotten during the Third Generation's reign, and it's only been a few years, and in the later period of the Boruto legend, the Uchiha had fallen to the point where even Uchiha Sarada was unknown to the Uchiha clan.
According to Sasuke's personality, it is impossible for him to have too many children. He only has one daughter, Sarada, and his daughter will eventually get married. In the ninja world, a woman has to change her surname when she marries a man.
Unless you are from a wealthy family!
Izumi's mother was deprived of her surname because she married out, and because she awakened her bloodline limit, she was given the surname Uchiha again, but she was just a marginal figure.
This is very common in the ninja world. In order to ensure the purity of their bloodline, most families practice intra-family marriage.
...
In the experimental building, Naruto brought Kurama Yakumo to Sasuke. A day had almost passed, and this was the best time to cast an illusion on Sasuke.
Time passed slowly, and Sasuke slowly opened his eyes. With hazy eyes, he heard someone happily shouting, "Sasuke-sama, wake up."
When Sasuke fully woke up, he saw Naruto asking about his condition. Sasuke felt warm in his heart and said slowly: "I'm fine, I feel pretty good!"
Sasuke said happily, feeling the amount of Chakra in his body doubled, and he was overjoyed. Even his pupil power felt much stronger.
Afterwards, Sasuke was pulled by Naruto to discuss something, and soon Naruto told him that if he wanted to awaken the Mangekyō Sharingan, he had to go through a battle before he could awaken it.
Sasuke felt strange, as if he had forgotten something.
Things progressed quickly, and soon Naruto told him that Uchiha Itachi had come to the Rain Country with Sasuke as his target.
And this is also an opportunity, an opportunity for him to awaken the Mangekyō Sharingan!
Thinking of the hatred hidden in his heart, Sasuke quickly agreed with Naruto and went to find trouble with Uchiha Itachi.
Along the way, Sasuke thought about his current strength, felt the powerful Chakra in his body, and the various ninjutsu he had practiced for a long time.
A strong sense of confidence rose in Sasuke's heart.
But now, he couldn't remember why his Chakra grew so fast.
But now is not the time to dwell on this.
Uchiha Itachi had appeared in his sight.
He slowly drew out the Kusanagi sword and began to charge towards Uchiha Itachi.
Rage began to fill his mind, and he slashed at Uchiha Itachi with the sword in his hand, shouting, "Why? Tell me why? Why did you betray the family?"
"Is the so-called village really that important?"
Unlike Sasuke's anger, Uchiha Itachi was surprisingly calm and said slowly, "My foolish brother, is this how tolerant you are?"
"Foolish family, foolish tribesmen, there is no need for them to exist. Their only role is to be a stepping stone to measure my ability!"
Sasuke almost went crazy after hearing this, and the rhythm of his attacks on Uchiha Itachi was messed up.
He continued to hack and chop, and when he saw that his attacks were not working, the power of thunder began to spread from his body.
Lightning bolts struck Uchiha Itachi, but they were all easily dodged or blocked.
At the same time, Sasuke also mobilized the Sharingan, and the three magatama stared at Uchiha Itachi's figure. At this time, Uchiha Itachi showed a sarcastic look.
"My stupid brother, don't you know that using three magatama to beat Mangekyō is a joke?"
Came the mocking voice of Uchiha Itachi.
This actually calmed Sasuke down, and he said coldly, "If the Mangekyō Sharingan is all you can rely on, then you will probably be defeated by me today!"
Sasuke's voice suddenly rose and he shouted, "My foolish brother, you know nothing about power!"
"Lightning Style: A Certain Scientific Railgun!!"
Sasuke had a coin in his hand without knowing when.
Sasuke threw the coin in his hand out, accompanied by a force of lightning. The speed of the railgun was extremely fast. The faster the speed, the more powerful the attack of the railgun would be.
The next moment, a giant rose from the ground!
The bright red giant stood in front of Itachi!
boom!!!
Sasuke's attack collided with Susanoo's body.
There was a violent explosion and smoke rose up. When the smoke cleared, a hole was found in Susanoo's chest, but the attack seemed to have been blocked.
Sasuke's heart sank!
No! It was stopped, or rather, it was not completely stopped!
Sasuke caught a glimpse of the blood at the corner of Itachi's mouth.
Sasuke suddenly smiled, and Itachi's indifferent expression made Sasuke angry.
"My foolish brother! Is this the limit of your strength?"
Itachi's voice came from a distance. On a tree, Itachi's figure turned into a flock of crows and then gathered into a human form again.
"Oh, is that your partner? If I kill him, will you awaken eyes like mine? Only then will you be qualified to become my nourishment!!"
Sasuke glanced at Naruto who was watching the battle from a distance, then looked at Itachi and sneered. Did he think Naruto was a soft persimmon?
Itachi turned into a crow and rushed towards Naruto at high speed, only for Naruto to use Wind Style·Range Hand instantly!
The powerful Wind Style hit the crows, causing powerful Chakra to burst out instantly.
Directly knocking Uchiha Itachi away, Sasuke sneered and thought to himself that it was just as he expected.
Suddenly he heard a voice: "Be careful!!"
Sasuke was instantly surprised, and just as he turned around, he saw Uchiha Itachi approaching at high speed, holding a kunai in his hand, but he could no longer dodge it now.
He could only watch Itachi stab towards him, wondering in his mind, who was that figure just now?
I closed my eyes weakly, and the next moment, there was no pain, but a slight warmth feeling on my hands.
When he opened his eyes, he saw Naruto standing in front of him, blood gushing from his mouth. A kunai was stuck in his chest, going straight into his heart. Blood dripped and fell on his hand, which was warm.
Sasuke's expression was full of disbelief, his pupils instantly dilated, and the three magatama quickly rotated and slowly merged into a hexagram.
Naruto collapsed to the ground, Sasuke hurriedly hugged Naruto, tears instantly flowing down his face, his expression dazed.
Then a roar appeared: "No!!!!"
He placed his hand on Naruto's chest, trying to stop the bleeding, but he didn't notice that Uchiha Itachi appeared blurry.
"What use would I have for this Mangekyō if you were dead? Wake up, I won't take revenge anymore!"
Sasuke roared, tears streaming down his face uncontrollably.