Highlight

There are quite a few methods in the ninja world to increase Chakra reserves. Yu knows of a few: transplanting Hashirama Senju's cells, which, if successful, can grant massive Chakra and even awaken the Wood Release Kekkei Genkai.

Then there's the Hero Water of Takigakure, which can increase Chakra reserves tenfold with just a drink.

Another option is to become a Jinchuriki, as the Tailed Beasts' Chakra is nearly infinite.

However, none of these three methods are suitable for him. He has no way to obtain Hashirama Senju's cells, and he doesn't even know where Takigakure is. Besides, the Hero Water is Takigakure's treasure, and he lacks the strength to acquire it. Becoming a Jinchuriki is even more impossible; the Tailed Beasts aren't like kittens or puppies, so this method is even more unfeasible.

"This won't work, that won't work, what am I supposed to do!" Yu sighed softly, sitting cross-legged on the ground.

His ninja career was almost over before it even began. Chakra limits a ninja's future growth potential. Without Chakra, one cannot use Ninjutsu, and his Taijutsu is even worse.

His current body can't handle high-intensity training, not because of fatigue, but because his Slime body is too weak. Applying even a little force will deform his body, like a piece of plasticine that changes shape when too much force is applied.

Although his body contains all the human organs, they are all simulated. In essence, he is now a collection of "fleshy" substances.

Moreover, the hardness of his bones and flesh is about the same, so he can't undergo high-intensity training, which means Taijutsu can't save him either.

"Wait, isn't there also Sage Mode?"

Yu thought of another powerful force.

Chakra isn't the original power of the Naruto world; it was brought by Kaguya Otsutsuki from another world. The native power of the Naruto world is Sage Mode, also known as Natural Energy.

Natural Energy is widely present in the world, but gathering Natural Energy to use Sage Mode is very difficult. In the entire ninja world, there are only three great sacred places with Sage Mode inheritance: Mount Myōboku, Shikkotsu Forest, and Ryūchi Cave.

Although Hashirama Senju can also use Sage Mode, that's a special case, not an inheritance.

After recalling information about Sage Mode, Yu once again realized that he couldn't practice it because he didn't know how to gather Natural Energy.

"Am I the worst transmigrator ever? In the Naruto fanfics I used to read, people could create Ninjutsu at will soon after arriving, and Sage Mode was easily mastered. Why is it different for me?"

The worst thing is comparison, and Yu felt like he was nothing.

"No, no, I can't be so discouraged. It's just that I haven't found a suitable method yet. There must be a way to solve these difficulties," Yu said to himself.

In the following days, he and Sasuke would come to the training grounds every day. In the morning, there was Taijutsu training, which Yu usually didn't participate in. He didn't want Sasuke to see the strangeness of his body, and besides, Taijutsu training had too little effect on him. It was better to spend that time on refining Chakra. Even a small improvement every day would become considerable over time.

In the afternoon, there was Ninjutsu training. Ninjutsu training didn't involve directly using Ninjutsu, but focused on Chakra control and practicing hand seals.

During this process, Yu pretended to be a newbie and offered some immature suggestions for Chakra control, namely tree climbing and water walking.

Sasuke didn't think much about what his 'younger brother' said and chose to believe him. These were training methods that Sasuke wouldn't encounter until five years later, so they would definitely improve Sasuke's strength. Of course, the improvement wouldn't be very high, as these were just two small techniques.

Yu naturally tried these two training methods as well.

Ordinary ninjas' Chakra flows through the meridians in their bodies, but his Chakra can flow freely within his body, unrestricted by meridians, making it very easy to control.

And this finally allowed him to discover one of his strengths—his Chakra control was very high, worthy of being called a genius.

He only tried tree climbing and water walking a few times before finding the knack, while Sasuke practiced for two days before barely succeeding.

Seeing that Yu was stronger than him in this aspect, Sasuke wasn't jealous at all, but rather very happy. In Sasuke's heart, Yu was already his own brother, and Sasuke would only be happy to see his brother have talent.

At seven o'clock in the evening, the day's training ended, and Yunshang Jinwei had prepared a table of food.

There were only two brothers at the dinner table. Sasuke placed a chop of meat in Yu's bowl.

"Yu, don't be too stressed about Chakra. Take your time, and there will always be a way to solve it," Sasuke said to Yu. Over this period of time, Sasuke had grown up a lot, and he was also learning how to be a good older brother.

"Yes, Sasuke-nii."

Yu said vaguely as he put the chop of meat into his mouth. Now he had entered the role of Sasuke's younger brother, and he felt pretty good about it.

In his previous life, his parents divorced when he was very young, and he didn't experience much family warmth. He lived alone when he was in middle school, and he didn't have much contact with his parents' newly formed families. Now, having an older brother who cared about him felt very good.

"That's good. By the way, the Ninja Academy notified us to go to class tomorrow," Sasuke said after taking a bite of food.

"Okay!"

Yu nodded. He was very interested in the Ninja Academy.

In his previous life, he had been going to school since he was four years old and didn't graduate until he was twenty-two, so going to school wasn't a strange thing for him. Moreover, the Ninja Academy taught other subjects besides Ninjutsu, including physics, chemistry, mathematics, and language arts.

The next morning, Yunshang Jinwei knocked on his door. After washing up and eating breakfast, he and Sasuke walked side by side towards the Ninja Academy.

The Ninja Academy is one of the most important places in Konoha, nurturing batches of excellent ninjas for Konoha.

The two of them were wearing the Uchiha clan's exclusive clothing, especially the Gunbai pattern on their backs, which indicated their identities.

Not many people recognized Yu yet, but Sasuke was a popular figure in the school. It could be said that all the students in the Ninja Academy knew him.

This also meant that the two of them were discovered by their classmates as soon as they entered the school. However, many students didn't know about the Uchiha clan's affairs. Although Konoha had spread the word about this, not everyone could know, especially since Konoha stipulated that children shouldn't be casually informed.

After entering the school, the two of them separated and went to their respective classes.

According to his memory, Yu sat in his seat. His seat was in the corner at the back, but fortunately, Konoha used tiered classrooms, otherwise this seat would have been disconnected from the class.

Yu wasn't very popular in the class either. None of the children in the class greeted him, which was also because the former Yu was a silent type who never took the initiative to contact people.

But this was exactly what he wanted, to be quiet and comfortable. During class, he wanted to think carefully about how to improve himself.