"Yes, this is it!"
After walking for about half an hour, Yu finally arrived at the training spot he had been looking for.
It was a low-lying valley with a clear stream running through the middle, and a magnificent waterfall cascading down from the mountain.
There was no sign of anyone within a kilometer radius, and the area was surrounded by dense forests, ensuring privacy from prying eyes.
"Before I start training, I should check the nature of my chakra."
Yu reached into his ninja pouch and took out a chakra test paper, holding it in his hand.
He concentrated his chakra into his hand and transferred it onto the test paper.
Soon, Yu saw a change in the test paper. After infusing it with chakra, the paper first became wet and then wrinkled.
"A change in the properties of water and lightning?"
After observing the changes on the test paper, Yu muttered to himself, "If they can be fused together, it would be Storm Release - a lightning that can be controlled like water."
Storm Release, a kekkei genkai formed by merging the chakra natures of water and lightning, was a very powerful bloodline limit ability.
For example, in the original Naruto series, Madara Uchiha used the Sage Art: Storm Release Light Fang, which was similar to a laser beam and had enough power to break through Naruto Uzumaki's Truth-Seeking Balls created by inheriting the Six Paths Sage Techniques.
Because he was a transmigrator, knowing his chakra nature was essential.
After determining his chakra nature, Yu naturally began to imagine how to better develop his abilities.
"However, bloodline limit-level chakra nature changes like this are not something I can consider right now."
"Better focus on training and developing the powers of the String Fruit first."
It was a beautiful thought, but in reality, Yu was still a little kid who hadn't even entered the ninja academy.
So, for now, it was wiser for Yu to work on developing the power of the String Fruit he had just acquired.
"Mono-String!"
Putting an end to his daydreaming, Yu focused on a small tree trunk in front of him.
He extended his hand into a claw shape and swung it toward the small tree trunk.
An almost invisible and extremely thin string, too fine for the naked eye to see, emerged from Yu's fingertips.
"Bang!"
The string, sharper than piano wire, sliced through the air.
Carrying the full force of Yu's strike, the small tree trunk in front of him snapped in two.
The cut was neat and smooth, as if it had been sliced by an invisible scythe.
"Very good..."
Seeing the small tree trunk cut in one strike, Yu nodded in satisfaction.
To have such destructive power right after gaining the String Fruit ability was already impressive. With diligent practice, Yu believed that he could hold his ground in the ninja world, at least against most opponents, as long as they weren't the crazy endgame bosses.
The String Fruit was an incredibly powerful and versatile Devil Fruit ability.
It allowed the user to transform their body into strings, remotely control others like puppets, attach strings to clouds and fly in the air, control the movements of multiple targets simultaneously, and use invisible strings to cut through both living beings and objects, even slicing through materials harder than steel.
With further mastery, the String Fruit could be used to sew wounds shut, automatically repairing the user's internal organs.
In the awakened stage of the Devil Fruit, its terrifying power could turn all non-living objects in the vicinity into transparent strings, which could then be gathered together to launch an all-penetrating attack against the target.
In the world of "One Piece," Doflamingo had already mastered the String Fruit's abilities to an impressive extent.
However, what Yu needed to do now was to surpass Doflamingo and become even stronger.
"So... Five-String!"
With his gaze focused, Yu continued to practice in front of the cut tree trunk.
He activated the power of the String Fruit within him to its fullest, forming claws with all five fingers.
What Yu aimed to do was to simultaneously create five invisible, sharp strings on his five fingers and cut the remaining tree trunk into six pieces with a single strike.
Swish!
However, after he struck, nothing happened. Yu stood there, looking at the empty space in front of him.
"Ugh..."
"It's still not working..."
He hadn't achieved the technique he had envisioned.
Yu shook his head with frustration. "It seems like the path of training is long and arduous..."
But Yu didn't feel too discouraged. On the contrary, he became even more determined to focus on his training.
After all, he had only acquired the String Fruit's ability yesterday, and being able to use it to this extent so quickly was already quite impressive.
...
As the daylight shifted, the time gradually moved into the afternoon.
The scorching sunlight filtered through the gaps in the forest, casting its rays onto Yu.
"Huff... Huff..."
Yu, who had been training continuously, soon began to sweat profusely.
His chest heaved up and down, and he panted heavily.
"I've trained enough in taijutsu and the String Fruit's abilities for today."
"What's left is..."
After taking a short break under a large tree and gradually recovering his strength and chakra, Yu walked to the edge of the small river. He closed his eyes and attempted to concentrate chakra to the soles of his feet. Once he felt the chakra under his feet, he gently stepped onto the surface of the river.
Splash!
Unexpectedly, Yu's entire foot plunged into the water, splashing his face.
"Climbing trees and walking on water are essential ninja basics."
"I mastered tree climbing in half a day, but for some reason, I just can't seem to get the hang of walking on water. It doesn't make any sense!"
With a somewhat embarrassed look, Yu crawled out of the water.
Standing by the river, he couldn't help but wonder. In the original story, it had taken Naruto, Sasuke, and others almost a week to master both tree climbing and water walking. Yu, with his exceptional talent and the quick refinement of his chakra after acquiring it, had mastered tree climbing in just a day. However, for some inexplicable reason, he had been struggling with water walking for a long time.
"Splash!"
"Splash!"
Unwilling to give up, Yu tried again several times.
However, he kept falling into the water, making him look quite disheveled.
"Hehehe..."
Just when Yu was feeling frustrated, laughter suddenly rang out.
"Who's there?!"
Hearing this unfamiliar laughter, Yu's heart skipped a beat.
He had been so absorbed in practicing water walking that he had forgotten to be vigilant of his surroundings.
"It's not like this. Climbing trees and walking on water are different."
"Climbing trees involves gathering chakra at the soles of your feet, attaching your body to a surface like a suction cup."
"But walking on water is the opposite. You gather chakra at the soles of your feet and gently release it, increasing the pressure on the water's surface, allowing you to walk on it."
Accompanied by the voice of the stranger, Yu turned his head and saw a boy who appeared to be about his age.
The boy was sitting on a tree trunk not far from Yu, with black eyes that seemed to be laughing as he looked at him.
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