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

The next morning.

"Cough, cough," Lin Chuan coughed dryly as he got out of bed, covering his mouth. When he got to the bathroom, his palms were covered in bright red blood. He immediately turned on the tap to wash his hands, sighing inwardly, "My body has reached its limit..."

Nine years have passed. He was only three years old when he transmigrated here. He started high-intensity training at the age of three. When he was seven, he was afraid of being surpassed by Naruto and Sasuke, so he continued to strengthen his training and desperately squeezed out his body's potential. After nine years, he finally squeezed this body to its limit and ruined it.

Judging from yesterday's performance, his current strength is even greater than he expected for a Chunin. Nine years of relentless effort have finally yielded him considerable power. This is also the price he has to pay for relentlessly squeezing this ordinary body without any bloodline, forcibly maintaining the persona of a genius, and suppressing Naruto and Sasuke.

It's probably because he fought too hard in yesterday's battle that the hidden injuries from training flared up. Fortunately, there are still ten months until the Chunin Exams, so he only needs to persevere for another ten months before he can go home.

Actually, going home now is fine. He has already received the fifty kilograms of gold that Kabuto promised, and his deal with Kabuto ended the moment he and Sasuke graduated.

However, he doesn't plan to go back yet. He can't just leave without showing off the strength he's cultivated for nine years. It would be too embarrassing to go back so slinking away. He wants to go big in the Chunin Exams.

What Chunin Exams? What Konoha Crush Plan? Without this despicable outsider's participation, it would be too boring. He has been preparing for the Chunin Exams for a full nine years, to give everyone a big surprise!

After washing the blood off his hands and rinsing the blood from his mouth, he pretended to be fine and got up early to eat breakfast. He put on his ANBU protective gear, covered it with his coat, slung his short sword over his shoulder, and prepared some rations and ninja tools. He arrived at the entrance of the Hokage Building's mission department early in the morning.

He had just arrived when he encountered Naruto and his two companions. Were these three also on a mission here? But where was Kakashi? Was he late again? Perhaps he learned it from Obito. It seems Kakashi has become just like Obito.

"Chuan, good morning. Are you here on a mission too?" Sasuke had good eyesight and spotted Lin Chuan the moment he arrived. Lin Chuan's sparring partner had played a crucial role in his significant progress over the past few years, so Sasuke treated Lin Chuan much better than he did Sakura, who was a simp.

"Hey, you guys are here too. What kind of mission are you taking?" Lin Chuan walked over and greeted them, stopping in front of the three of them and looking them over curiously. They must have all passed the test to lead a Jonin team!

I wonder if Mizuki tempted Naruto to steal the Scroll of Seals like he did in the anime. After all, Naruto isn't incapable of graduating now, and Mizuki probably can't beat him yet, so stealing the Scroll of Seals would be pointless.

"I don't know yet. Kakashi-sensei, why isn't he here yet?" Naruto complained. He was late picking them up yesterday, and now he's late again for a mission today.

"You're here on a mission too? I don't see any of your teammates." Sasuke looked around and found that Lin Chuan had been standing there for a while, and he was all alone.

"Both of my teammates were eliminated, and I was the only one who passed the test to become a Jonin leader. The captain plans to let me join their team and do missions together," Lin Chuan said, shrugging. He had only graduated for two days and was already all alone. It was truly unbelievable.

"With your strength, your teammates probably won't be able to help much either," Sasuke nodded slightly. He wasn't surprised that Lin Chuan could pass the test to lead a Jonin. If Lin Chuan couldn't pass, then they shouldn't be ninjas, since they couldn't beat Lin Chuan.

"So we really are going to be eliminated? I thought Kakashi-sensei was just kidding us," Sakura Haruno said, looking at Rin. In the six years since they started school, Rin had often skipped classes, and Sakura's impression of him was still that of a problem student, since she spent most of her time paying attention to Sasuke.

"Yes, if you are not mentally strong and your strength is also poor, you will not be able to graduate smoothly if you cannot complete the test to lead a team of Jonin." Lin Chuan nodded slightly. He did not pay much attention to Haruno Sakura either. He was not interested in these love-struck girls. He only knew that they were very pretty little girls.

He didn't pay much attention to the other girls among the twelve main characters. After all, he could leave this time travel at any time. He didn't want to fall in love here, nor did he want to develop any meaningless feelings for the supporting characters. Adults are very goal-oriented.

His goal was clear: first, to earn some money to pay off the mortgage and protect the house and the Hokage Sect. Otherwise, if the bank foreclosed on the house, he would probably be devastated. He would consider matters of the heart later; he had plenty of time to have fun with the ninja world.

"Yo, everyone's here," Kakashi said, holding a red-covered copy of Icha Icha Paradise. His dead fish eyes were still drooping as he looked at his disciple whom he had just taken in yesterday, and a certain annoying guy. If it weren't for this guy, he wouldn't have had to teach Sasuke Lightning Release ninjutsu so early.

"Kakashi-sensei, let's hurry up and get the mission! I can't wait any longer!" Naruto saw Kakashi arrive and quickly went over to tug at Kakashi's clothes. He had been looking forward to the mission for a long time.

"Hey, hey, don't rush, there's no end to the missions," Kakashi seemed to still be half asleep. He had stayed up all night watching Icha Icha Paradise again and had no interest in the upcoming mission. After all, it was just a D-rank mission for newbies to practice on, which was really not very interesting for a Jonin.

At the same time, Baiyun also came out of the mission department in the morning, holding a mission scroll in his hand, with a fat man and a man wearing a kendo uniform and a samurai sword at his waist.

The three approached Lin Chuan, and Bai Yun finally spoke earlier, asking, "Chuan, the mission has been assigned, are you ready...?"

"Captain Morning, I'm ready and can set off at any time." Lin Chuan only had his ninja tool bag and mission supplies on him, along with the short sword at his waist. He planned to travel light.

"Very well, let's set off then," Bai Yun said, turning to look at the two people behind her as she prepared to leave.

The samurai let out a soft "Eh," expressing his confusion, and asked, "Morning Jonin, my master issued an A-rank mission. How could he let a child participate? Let alone protect my master, can a child even protect himself...?"

"Now that I've accepted your mission, I'll arrange my own team members. I have no record of mission failure. If you don't trust me, you can withdraw your application and find someone else to take on the mission..."

"No, I didn't mean that, Jonin Hayashi," the samurai with the sword immediately stopped questioning Hayashi when he heard her displeasure, and bowed his head to apologize, "I was too talkative, Jonin Hayashi. Let's set off quickly, my master is waiting for us..."

"Let's go then," Bai Yun said, turning back to look at Lin Chuan. He had already tested Lin Chuan's strength and found him to be at least a Chunin level, enough to accompany them on this mission.

"I'm leaving now. We'll meet again when I get back from the mission," Lin Chuan said after seeing Bai Yun and the other two leave. He said goodbye to Naruto and Sasuke and immediately jumped onto the roof and disappeared.

"Wow, it's an A-rank mission! We need to do an A-rank mission too!" Naruto's eyes lit up when he heard about the A-rank mission, and he urged Kakashi to quickly accept it.

"Hey, you guys aren't doing A-rank missions yet, so don't compare yourselves," Kakashi said, rubbing his forehead in exasperation. If he wasn't mistaken, the A-rank mission that Shirokumo had taken on that morning was bound to involve a conflict with enemy ninjas.

Therefore, the configuration of Shirakumo Hayato's team cannot be bad. Including Shirakumo Hayato, a famous Jonin, that fat guy can also be considered a special Jonin, and Lin Chuan, whom Naruto and Sasuke cannot defeat, it can be barely considered a configuration of three Jonin.

With this kind of setup, the last teammate must also be a Jonin, or at least a Special Jonin. An A-rank mission that requires four Jonin to carry out together is not simple at all. His team configuration is not enough to do such a mission.

"An A-rank mission right off the bat?" Sasuke clenched his fist as he watched Lin Chuan's departing figure. If he hadn't yet awakened his Sharingan, he wouldn't have been constantly outmatched by Lin Chuan.

Although he and Naruto had the strength to defeat Lin Chuan, he wanted to defeat Lin Chuan alone. Now that Lin Chuan's first task was to achieve A-rank, he realized that he had fallen behind Lin Chuan again.

"Wow, amazing! He can do A-rank missions right after graduation? Is he really our classmate?" Sakura Haruno realized at this moment that Lin Chuan, who often skipped classes, seemed to be quite amazing as well. How could she have forgotten about this impressive classmate and only focused on Sasuke?

Speaking of Lin Chuan, he was kind of handsome, but not as handsome as Sasuke. She still preferred Sasuke.

……

At the gate of Konoha Village, after handing over the village exit procedures in the morning, Baiyun came to the three of them and led over a Hyuga clan ninja, introducing him to them: "This is Hyuga Tokuma, a special Jonin of the Hyuga clan. With him on this scouting mission, we can avoid a lot of trouble."

"Hello everyone, I'm Hyuga Tokuma, Captain Hayashi. Nice to meet you." Hyuga Tokuma glanced at his teammates. Hayashi Shirakumo was the one who invited him and was also a well-known Jonin. He believed in the captain's strength, which was why he accepted the invitation to join Hayashi Shirakumo's team for missions.

The fat man was Tekuno; they had met him before. He was a fairly strong special jonin. Only one child remained? How could there be a child here?

"My name is Kawa. I'm a genin who just graduated from the Ninja Academy a couple of days ago. I was just taken in by Teacher Hayashi," Lin Kawa introduced himself as soon as he saw Hyuga Tokuma looking at him.

"Captain Hayashi, isn't a genin unsuitable for this mission? Who will be responsible for his safety?" Hyuga Tokuma looked up at Hayashi when he heard that Lin Chuan was just a genin and was unaware of Lin Chuan's strength.

"Don't worry about his safety, he'll take care of it himself. If there are no problems, we'll set off. Our destination is the Land of Hot Springs." Baiyun knew that Lin Chuan's identity as a genin was likely to be questioned by his teammates, but once Lin Chuan showed his strength, no one would doubt him anymore.

"Keep up, don't fall behind," Tekuno gently patted Lin Chuan's shoulder. Anyway, he would unconditionally trust Captain Hayama. As long as Captain Hayama said it was okay, then it was okay.

"Yes, Kuno-senpai," Lin Chuan nodded lightly, followed the others as they ran out of the village, then jumped into the woods, leaping up and landing on tree branches, gradually moving away from Konoha Village.

……

Night, in the forest——

After dinner, the four of them sat around the fire. One of them kept watch, while Lin Chuan did not have to participate in the watch. They would take turns every four hours.

"We'll travel during the day and rest at night. We need to reach the Land of Hot Springs in three days," Baiyun said, taking out a map in the morning. Seeing no particular precautions along the mission route, she put the map away. "If there's nothing else, go and rest..."

"Okay, morning captain," Tekuno yawned when he heard he could rest, casually found a piece of wood to use as a pillow, lay down by the fire and fell asleep.

"Chuan, you did well today. We'll speed things up tomorrow," Bai Yun said, nodding in satisfaction after testing Lin Chuan during their morning journey and finding that he could keep up with their pace.

"Okay, morning team leader," Lin Chuan nodded gently, found a piece of wood, lay down under the tree trunk, and slowly closed his eyes.

He thought that he could travel very fast today, at the normal pace of a Chunin, and that catching up would be easy. If he couldn't catch up with them, what would be the point of traveling ten kilometers every day for the past nine years?

After a day of observation, he discovered that the fat man Tekuno was the slowest. Even the samurai with the sword was much faster than the fat man. Could it be that the other party became a special jonin for some other reason?

Stopping his mind from all the nonsense, he quickly fell asleep. With three Jonin surrounding him, it was hard not to feel safe.

After Hyuga Tokuma finished his first watch, Tekuno took over for the second watch, and Shirakumo Hayama took over for the third watch. They kept watch from the early hours of the morning until dawn, and then they prepared to set off.

After another day of travel, they arrived at the border of the Land of Fire. They rested for one night at the border post, and after greeting the Konoha ninjas at the border post in the morning, they crossed the border on the morning of the third day and arrived in the Land of Hot Springs.

Upon entering the Land of Hot Springs, Lin Chuan felt the same way he had when he visited the Land of Hot Springs a few years ago: the chaos in this country was not over yet, and the villages he passed through were mostly empty, either because the people were gone or had fled. It was impossible for them to still be in the village.

When they arrived at the nobleman's residence near the capital of the Grass Country, it was already evening. Baiyun had taken Hyuga Tokuma to meet the person who had made the request earlier, while Linchuan and Tekuno watched the servants carrying things and loading them onto the cart with boredom.

It seems this is an escort mission. Lin Chuan looked at the valuables being packed by the servants, wondering where this nobleman was going to escape to.

Baiyun met the nobleman who had entrusted the matter to her in the morning. After discussing things for a short while, the two went to the courtyard.

The nobleman's patron was a middle-aged man with a beard, poor mental state, dark circles under his eyes, and a gaunt face. The middle-aged man pointed to the goods on several carriages, and Bai Yun immediately took out a sealing scroll and put all these precious items into the scroll.

The negotiations between Baiyun and his group only ended when only four carriages remained in the field, each pulled by two horses and piled with daily necessities needed for the journey, which were placed on the carriages for easy access.

Baiyun saw the client off to his room early in the morning. He looked up and saw that it was already dark and the sun had long since disappeared. He found Lin Chuan and Tejino and called out to them, "The client has prepared dinner and rooms for us. We'll rest here for the night and set off tomorrow."