Naruto: I start with one door, and I can open it infinitely.

One month later...

Another kunai throwing test, but this time the test was a little different because Lin Chuan skipped class again in the afternoon.

For Lin Chuan, this kind of boring exam was something he could do once and then forget about doing it every day; he wasn't exactly a free kid. He had a lot of training tasks to complete, and time was tight and the workload was heavy, so he didn't have time to play ninja games with these kids.

"Chiba Rinkawa, Rinkawa?" Iruka called Rinkawa's name twice, and when Rinkawa didn't stand up, he realized that the little guy had skipped class again.

He sighed and rubbed his forehead, glancing past Chiba Rinkawa's name and looking at the next person, calling out, "Uchiha Sasuke, it's your turn..."

"That guy didn't come?" Sasuke looked at the crowd, ignoring the group of chattering, particularly annoying little girls, and noticed that Lin Chuan was not there. He had also heard about Lin Chuan's reputation for skipping classes, and he couldn't help but grit his teeth inwardly.

He had been hoping to get revenge today, but that guy skipped class. He wasn't surprised that the guy had skipped 28 out of the month's classes; what really bothered him was not being able to beat him in this exam…

"Uchiha Sasuke, ten points," Iruka nodded slightly as he saw the ten kunai planted firmly on the bullseye, thinking to himself that it was indeed a mistake last time. How could a child from the Uchiha clan miss the target?

"Wow, a perfect score!" The girls screamed when they saw Sasuke get a perfect score. They all ran over to surround Sasuke, wanting to ask him for tips on throwing kunai.

Sasuke felt annoyed by the chattering girls. All he wanted to do was find Lin Chuan, defeat him, and prove his strength to his father.

But Lin Chuan skipped class today...

"Naruto Uzumaki," Iruka said, ignoring the chatter of the children and still busy with his exam. When he called out Naruto's name, he realized Naruto wasn't there, and a few black lines appeared on his forehead.

He already knew where Naruto had gone. The kid had been skipping classes with Lin Chuan a lot lately, claiming he was learning kunai throwing from Lin Chuan.

He wasn't worried about Naruto because he knew Naruto's identity and that the Anbu were always following him. Besides, Naruto didn't have parents, so even if he called for his parents, he wouldn't know how to do it, since the person who would call for his parents would most likely be the Third Hokage, Hiruzen Sarutobi.

Skipping over Naruto's name, he moved on to the next child's name, saying he would go find Naruto later; class was more important now.

……

at the same time……

Lin Chuan and Naruto were practicing kunai throwing at a training ground near Lin Chuan's house...

After a month of practice, Naruto's kunai hit rate improved by five points. Combined with his original score of one point, he now had a total of six points, which was a pretty good improvement. All of this was noticed by the Anbu.

Lin Chuan was well aware of this. He knew that contacting Naruto would inevitably involve surveillance by the Hokage's Anbu, which was exactly the result he wanted. It would also provide an extra layer of protection, allowing Hiruzen Sarutobi to hear about his reputation as a young genius.

Therefore, after afternoon training, he would take Naruto home for dinner, saying, "Naruto, training's over, let's go to my house for dinner!"

"Great! Your mom's braised fish is so delicious. I want more!" Naruto ran with Lin Chuan, but collapsed on the ground after only five kilometers. It was normal for Naruto to be so young at this time; he wasn't the stamina-infinite Chaton who would become later.

"Braised fish? Let's go fishing by the river. If we don't catch any, we can buy some," Lin Chuan said, patting the dust off his backside with his backpack and heading towards the river outside the woods.

Including Naruto, that's four pairs of chopsticks, and we need at least three pounds of fish to eat, since training is very physically demanding.

"Lin Chuan, wait for me!" Naruto caught up with Lin Chuan with a grin. He was good at fishing; he often went fishing in the wild when there was no food.

The two arrived at the riverbank, each using a kunai to whittle a branch into a fishing rod. They had fishing line in their bags, plus a float made of licorice, and some earthworms they had dug up. They hooked the earthworms and threw them into the river.

Soon, fish started biting the hook. The river's fishing ecosystem was quite good, and they caught two or three pounds of fish in no time. They carried the fish back to Linchuan's home.

Lin Chuan's mother wasn't surprised to see Naruto return; he had come several times before. At first, she was a little scared, but Lin Chuan reasoned with her and appealed to her emotions…

He told his parents that the person who sent Naruto living expenses was Sarutobi Old Deng. If they didn't seize the opportunity to build a relationship now, how would they survive in the ninja circle in the future, or even get into the Hokage's Office, which had official positions? Most importantly, this person was their family's big benefactor.

An ordinary woman in Konoha Village might not understand the intricacies of ninja relationships, but her adoptive father was well aware of them. He approved of his son's actions, but he hadn't forgotten the terrifying night six years ago when the Nine-Tails Jinchuriki went berserk, and he had retired due to injuries that night.

Lin Chuan found it difficult to speak on this matter, as he couldn't explain the source of his information. He could only advise his Chunin father that the village had the Third Hokage, and if the sky fell, there would be tall people to hold it up, so they didn't need to worry about it.

If the Nine-Tails' seal wasn't secure, Naruto has survived all these years. Since there hasn't been any rebellion all this time, it means it's safe. In the end, even his adoptive parents were convinced by him.

After having dinner with Naruto, he went to the backyard of the cabin to train. Since Naruto didn't have his own training plan, he trained with Lin Chuan, doing a five-kilometer weighted jog.

After finishing his run, Naruto collapsed on the ground, exhausted. This was Naruto's first time running with weights, unlike Lin Chuan, who had been carrying weights since he was three years old. Two kilograms was easy for him, and he even planned to increase the weight to four kilograms.

"Lin Chuan, do you train like this every day?" Naruto sat on the ground panting after running five kilometers, and picked up his water bottle to drink water like crazy.

"Yes, we train every day," Lin Chuan said, feeling like he was clocking in for work. He trained like this every day so that he could have the strength to earn money to buy gold, pay off his mortgage, and make his life easier.

"I'm so tired. It's getting dark. I'm going back to take a shower and go to sleep." Naruto put down the one-kilogram weight on his feet, which was the same weight that Lin Chuan had discarded before. After washing it clean, he put it in the corridor, said goodbye to Lin Chuan, and left.

Naruto did consider training in ninjutsu, but climbing trees and wading through water were too difficult. He tried many times without success, so he gave up.

Because Naruto's chakra is too difficult to control, he can't even use the Three Body Techniques, let alone use chakra to climb trees or walk on water, which require more precise chakra control.

Without Sasuke as a formidable rival to keep him in check, Naruto wouldn't have been so enthusiastic about practicing tree climbing and wading. Lin Chuan just chuckled at Naruto's abandonment and let him do as he pleased.

The protagonist has a halo, can use cheat codes, and doesn't need to train as hard as he does. The protagonist's adventure is about growth, so it often doesn't seem so boring, but is full of passion and youth...

Cough cough, as if he had thought of something that would summon the dirty thing in the green vest, he watched Naruto's figure disappear, then cautiously looked around. Only after finding the place pitch black and silent did he breathe a sigh of relief and continue practicing his ninjutsu until his chakra was exhausted, before returning to the cabin to wash up and go to sleep...

Little did he know that after he fell asleep, a dark shadow flashed across the treetops outside the cabin and vanished without a trace...

……

at the same time--

Inside the Hokage's office in the Hokage Building, where the lights were still on, the shadowy figure that had just disappeared reappeared, placed a scroll on the Hokage's desk, and then vanished without a trace.

After finishing his official duties, the Third Hokage picked up the pipe beside him, lit it, took a light puff, and then opened the intelligence scroll to check Naruto's latest information.

When he saw the family of three that the Anbu had sent to investigate, he couldn't help but take it seriously. Chiba Rinkawa, a classmate who had recently come into contact with Naruto, had a mother who was just an ordinary person and a father who was a Chunin who was injured and retired during the Nine-Tails' attack. Going back three generations, they were all ordinary people with respectable family backgrounds.

The most interesting piece of information is about Chiba Rinkawa. During the Anbu's investigation, it was discovered that Chiba Rinkawa had mastered the Three Body Techniques at the age of three, including the Body Flicker Technique and the ability to throw kunai with perfect accuracy.

After Lin Chuan's father demonstrated ninjutsu once, he learned the C-rank water ninjutsu Water Clone and Water Chaos Wave, and within a month he practiced to the point where he could release them quickly. He can be considered a hardworking and good child.

"A little genius?" Hiruzen Sarutobi put down the intelligence scroll, stood up, looked out the window at the myriad lights of the city, and couldn't help but smile with satisfaction. He took a few more puffs of his pipe and muttered to himself, "Where the leaves dance, the fire burns eternally. Teacher, do you see? The village's new generation is endlessly emerging..."

At the same time, as Sarutobi Nobunaga's black glove, how could Shimura Danzo possibly miss the information that Sarutobi Nobunaga could obtain?

An intelligence scroll with the exact same contents as the one on Sarutobi's desk was now placed in front of Shimura Danzo's desk.

Danzo, now with only one eye remaining, gazed at the contents of the information scroll with interest, marveling at the endless stream of geniuses the village seemed to possess.

Before them were Orochimaru and his two companions, after them were the Fourth Hokage Minato Namikaze, and there were also Shisui and several other Uchiha, as well as the Chiba, Rinkawa, and the Ino-Shika-Cho trio of this generation.

At the same time, he was also looking for geniuses from various ninja clans. He chose the Konoha ninja clans because these clans all had family secret techniques, which gave them a higher starting point than many ordinary ninjas, and the probability of producing geniuses was also very high.

"Continue to observe," Danzo put down the intelligence scroll, blew out the candle, and whispered to his subordinates hidden in the shadows. This little genius should be observed for now; the most urgent task is to deal with the Uchiha.

……

The next day, after breakfast, Lin Chuan went to school with his lunchbox.

He arrived at the classroom door just as the bell rang, ready to enter, only to be blocked from entering.

Erzhuzi raised his hand to block Lin Chuan's path, coolly questioning him, "Why didn't you come to yesterday's kunai throwing test...?"

"Yo, isn't this the young master of the Uchiha clan? I skipped class yesterday. Are you satisfied with this answer?" Lin Chuan curled his lips, completely disregarding Er Zhuzi. Er Zhuzi was no match for him now, making it the perfect time to bully the weak.

"Damn it," Sasuke saw Lin Chuan's smile and instantly lost his guard again. That expression seemed to be mocking him, as if the other party didn't take him seriously at all.

"Class is about to start, please let me in," Lin Chuan heard footsteps and took two steps back. If Sasuke didn't let him in, it would be Sasuke who got his parents called in.

"No, I want to have a kunai throwing contest with you," Sasuke continued to block Lin Chuan, preventing him from entering.

"I concede, you win, young master of the Uchiha clan," Lin Chuan said with a smile, his surrender lacking any sincerity, looking at Erzhuzi as if he were a clown.

If he wanted to make a name for himself, Sasuke would be the perfect stepping stone. By stepping on the young genius of the Uchiha clan, he could quickly gain the attention of important figures from all sides, which was exactly his goal.

"Damn it, I'll make you stop laughing!" Sasuke's fist was already hard. Looking at Lin Chuan's fake smile, he got angrier and angrier. It was clearly mocking him. Instantly, anger surged up, and he raised his hard little pink fist to punch Lin Chuan.

"Tsk, you won't listen to me even if I speak properly, huh?" Lin Chuan had already noticed Iruka. He took two steps back until his back hit the wall, dodging Sasuke's punch.

Then, in a flash, he disappeared, appeared behind Sasuke, raised his hand and chopped at Sasuke's neck, knocking Sasuke unconscious.

The moment he was knocked unconscious, Sasuke had only two thoughts: "So fast!" and "Oh no!" before collapsing to the ground with a thud.

"Lin Chuan, you're fighting again?" Iruka roared at Lin Chuan after seeing him knock Sasuke unconscious.

"Iruka-sensei, it's not that I want to fight, but as a ninja, can't you see the enemy's fist coming at you?" Lin Chuan helplessly spread his hands in response to Iruka's roar and continued, "This time, Sasuke attacked first. He wanted to challenge me to a kunai throwing contest, which I refused. He then blocked the classroom door from letting me in and even attacked me with his fists..."

"Then you," Iruka only saw Sasuke faint, so he didn't react. Now that he thought back, Sasuke did rush out with his fist raised, but he didn't hit Lin Chuan, and then Lin Chuan...

He suddenly realized something absurd: how did Lin Chuan defeat Sasuke just now? It seemed like he used the Body Flicker Technique to get behind Sasuke, and he, as a Chunin teacher, didn't even notice. How could that be? Doesn't that mean Lin Chuan's Body Flicker Technique is at the Chunin level?

Iruka simply couldn't believe his own guess. This child was only six years old, yet he already possessed the Chunin-level Body Flicker Technique. Who taught him this?

"Call them after school..." Iruka saw Sasuke getting up with a bewildered look on his face. He was about to suggest that Lin Chuan and Sasuke call their parents after school, but Lin Chuan skipped school every afternoon, and the father and son were two-faced.

He always agrees readily, but then repeats the same mistake. Dealing with students and parents like this is a real headache for him, because calling the parents is completely useless. The words he wants to say to the parents are stuck in his throat, and in the end, he doesn't say them.

He could only turn to look at the bewildered Sasuke and shout, "Uchiha Sasuke, you're not letting your classmates into the classroom and you're fighting at the classroom door! Call your parents after school..."

Sasuke was still in a daze, completely unaware of how he had fainted. He looked at Lin Chuan, who had a helpless expression on his face, and the shock in his eyes lingered for a long time.

He realized he might not be able to beat Lin Chuan, a fact more shocking than calling his parents. He was an Uchiha, and every Uchiha student was known as a genius. For example, his older brother Itachi was a genius, so he considered himself one too.

But today he couldn't even see his opponent use the Body Flicker Technique, and he was even knocked unconscious. His opponent was obviously not only good at throwing kunai, but also at using the Body Flicker Technique.

Ignoring the shock in Sasuke's eyes, Lin Chuan entered the classroom, returned to his seat in the back row, and began to refine his chakra for the day.