"Sixteen years!"
Kai sat on the roof, gazing at the moonlight in the sky, picking up a wine bottle and taking a drink.
He was originally just an ordinary student from Blue Star. An accident caused him to travel to the Hokage ninja world and become a newborn baby of the Uchiha clan.
Knowing that he had traveled to the world of Hokage ninjas and that he was still a member of the Uchiha clan made him a little excited. There is no man who is not interested in extraordinary power.
But before he could be excited for long, war broke out, and his parents were sent to the front lines by Konoha. As a result, they died on the battlefield. Their happy family was gone, and he became an orphan.
He quickly realized that this was a world where life and death were uncertain. In order to survive, he had to continue to become stronger.
So he started practicing when he was one year old, and he didn't know if it was because he was a time traveler, but his talent was exceptional.
After he learned the news of his parents' deaths in this life, he activated his Sharingan in pain.
A one-year-old baby activating Sharingan caused an uproar among the Uchiha clan, and the entire Konoha Village might have known about it.
For safety reasons, he did not tell anyone the news and practiced silently.
By the age of four, he had already awakened his Mangekyō Sharingan.
His Mangekyō Sharingan ability was the same as Shisui's Distinguished Heavenly Gods. The ability was quite simple—traveling between two realms.
The two eyes could each fixate on a world as an anchor point, allowing him to travel between the two worlds without losing his way.
At first, he used the Hokage world as an anchor point and then activated the pupil technique of time travel.
The world he traveled to for the first time was actually one he was familiar with: the world of Demon Slayer: Kimetsu no Yaiba.
So he practiced hard in the Demon Slayer world.
During his time in Demon Slayer: Kimetsu no Yaiba, he joined the Demon Slayer Corps and learned all the breathing techniques, including the starting breath of Sun Breathing. He also used the Sharingan to copy and learn the sword forms of all breathing techniques.
In the end, he helped the Demon Slayer Squad defeat the ancestor of demons, Muzan Kibutsuji, which he considered repayment for learning the breathing methods.
The biggest advantage that Demon Slayer: Kimetsu no Yaiba gave him was the breathing techniques and sword skills, which significantly improved his strength.
Later, when the war broke out, he was sent to the battlefield and relied on what he had learned.
He gained an extremely famous name in the ninja world.
Sword God - Uchiha Kai.
His reputation in the ninja world was no less than, or even better than, the Yellow Flash of Konoha, the Fourth Hokage.
Later, Uchiha Obito controlled the Nine Tails to attack Konoha Village. He was ordered by Konoha's senior officials not to participate in the war. He was closely monitored by many Anbu and was not allowed to leave his house.
He knew that the top management of Konoha was afraid of him and worried that he would take the opportunity to control the Nine Tails, but he had no intention of doing so. Although the Nine Tails was very strong, he didn't really need it.
Since Konoha didn't allow him to participate in the war, he was happy to watch the excitement. He didn't want to participate in the war in the first place, and now he didn't even have to make excuses.
In the end, the Fourth Hokage was killed, and Konoha Village was destroyed.
Under the instigation of some scheming individuals, the villagers of Konoha Village began to believe that Uchiha Obito had controlled the Nine Tails demon fox, which was seen with Sharingan in its eyes.
The rumor spread that he had indeed orchestrated the Nine Tails' attack on the village.
As a result, he transformed from the great hero respected by everyone in Konoha Village into the great traitor despised by all.
Kai did not wish to clarify whether he was a traitor or not, but the top management of Konoha Village knew the truth best. They chose not to refute the rumors, clearly wanting to pour this dirty water onto him.
In the anime, the Third Hokage pretends to be virtuous, but in reality, it is the Third Hokage who truly forces the Uchiha clan to rebel.
After realizing this, Kai naturally no longer wanted to serve Konoha Village.
Following the Nine Tails incident, he stayed at home but secretly traveled to other worlds to train diligently.
The world of One Piece was one he had discovered not long ago. Before he could explore it in depth, he encountered a coup.
Considering the situation of the Uchiha clan and the One Piece world, it seemed ideal to bring the Uchiha clan into this new realm.
The Uchiha clan was actually very united, aside from the occasional extremists like Uchiha Madara and Uchiha Obito.
In this new world, the Uchiha clan wouldn't have to bow to the higher-ups of Konoha, nor would they have to endure the disdain of the villagers.
With the strength of his family, it seemed possible for him to create the Four Emperors of the New World. Thinking of this, Kai's lips curled into a slight smile.
Suddenly, a voice echoed in Kai's mind:
[Ding! Host detected! The system is automatically activated!]
[Family Rejuvenation System successfully activated!]
[Triggering main mission: Find a new location for the family.]
[Reward: One Tomoe Sharingan.]
"…"
When Kai heard the systematic voice in his mind, he was taken aback.
What's going on?!
I actually have a system?!
When he was just born, he had contemplated whether he might possess a system, as time traveler matching systems are standard in online novels.
But no matter how much he shouted or acted out, there was no response. Eventually, he had given up on the idea of having a system.
He had grown to this point entirely through his own efforts.
Looking at the entire ninja world, there were few people he couldn't defeat.
It turns out that he was a time traveler with a cheat after all.
But what is this One Tomoe Sharingan as a reward?
He had already attained Mangekyō Sharingan. Now, if the system rewards him with a One Tomoe Sharingan, why would he even want that?