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

Spring has arrived, and the second semester for first-year students at the Ninja Academy is about to begin...

He'll be seven years old by the end of this semester, and the night of the Uchiha clan's massacre is drawing ever closer.

Even a child like him heard some bad rumors, mainly about the police force's brutal enforcement of the law. It was probably spread by that old scoundrel Danzo, with the aim of creating momentum for the extermination of his clan.

When the evil of the Uchiha clan is deeply ingrained and ingrained in people's hearts, no one will care if only one person dies. After all, the knife wasn't cut on his own neck, so no one else will feel the pain.

The semester had just started when he saw Erzhuzi's sour face again. Perhaps because he had been defeated by Erzhuzi, the guy was still unconvinced and hadn't given him a kind look until now, always wearing that sullen face.

It didn't matter to him. He was just a brat. He would bully him again when his clan was wiped out and he had no older brother. He would beat him until he called him "Dad." Just thinking about it made him happy. He wouldn't stop until his face was swollen. Then he would see who would still say Sasuke was handsome.

As the school bell rang, Iruka arrived at the classroom as usual to give a lesson. Naruto still couldn't understand and was sleeping. Shikamaru lazily twirled his pen. Choji secretly ate snacks. Sakura Haruno secretly looked at Sasuke and occasionally glared at Ino. The others occasionally threw a paper ball or something.

Lin Chuan was naturally refining chakra. When it came to the ninja courses that interested him, he would sit down and listen for a bit. As for the knowledge he knew from his previous life, he was too lazy to listen to the lessons, since they were elementary school courses and there wasn't much to hear.

The morning classes passed quickly, and after lunch, it was time to skip class again. Iruka was completely dumbfounded by Lin Chuan's truancy.

On weekdays, if the afternoon classes were unusual, he would remind Lin Chuan, and Lin Chuan would usually stay to attend. However, if it was just basic training, running, throwing kunai, or playing ninja games, Lin Chuan would definitely skip class if he didn't mention it.

……

Iruka was right; Lin Chuan skipped class again on the first day of school.

However, Lin Chuan skipped class this time and didn't go to the training ground. Instead, he planned to go to the mission department to find his cheap dad. After practicing for a winter break, he could release the Water Wall and Water Dragon Bullet.

The Water Formation Wall was alright; he didn't need to perform the hand seals many times. However, the forty-four seals for the Water Dragon Bullet had been a problem for him for two whole months. He had just learned how to use the Water Dragon Bullet last night, and just now he went to the river to release another Water Dragon Bullet. After confirming that there were no problems with the Water Dragon Bullet, he planned to go to his father and tell him about it.

He also asked his father to invite Maruboshi Kosuke to their home at some time so that he could take the opportunity to demonstrate the Water Dragon Bullet. In addition, the older generation is always eager to learn, and given the rarity of such talent, Maruboshi Kosuke might teach him a simplified version of the Water Dragon Bullet, and he could also take the opportunity to become Maruboshi Kosuke's apprentice.

As for how his adoptive father invited Maruboshi Kosuke home, that was his adoptive father's business. He had asked his adoptive father before, and his father told him that his father and Maruboshi Kosuke knew each other and had even done missions together when they were young.

This is not surprising. Maruboshi Kosuke is a regular NPC in the Genin Missions Department, often teaming up with Chunin and Genin to do missions. His adoptive father happens to be a Chunin, so it's not surprising that the two of them have done missions together.

In addition, since his adoptive father works in the mission department, the two of them resumed their previous working relationship when Maruhoshi Kosuke came to take on the mission. His adoptive father even assured him that their relationship was very strong.

So he came to the mission department, where his cheap dad worked. He used to come here often during the winter break, which made many people know him. He became the "other people's child" that elders talked about, used to scold their own children who didn't work hard.

"Oh, Ogawa's here. Looking for your old man again, huh? He's in the mission log room!"

"Xiao Chuan got first place again! That's amazing!"

"If my brat had half of Xiaochuan's skills, I could sleep soundly..."

"Thank you, Uncle," Lin Chuan said, accepting all the praise from the elders with a smile, while pretending to be humble.

There's no way around it, he earned all of this through hard work. He trained for so long, shouldn't he be allowed to enjoy himself?

"Look, this child is so sensible and well-behaved..."

"Sigh, my son, he doesn't even greet people when he sees them..."

However, these parents haven't realized a problem: the "good kids" they're talking about are actually skipping school.

After bidding farewell to the older generation in the mission hall, Lin Chuan also found his adoptive father in the mission record room. All missions issued by the mission department had to be organized and archived to facilitate future retrieval of relevant information and to provide some local information to ninjas who were going to the same area to carry out missions.

"Xiao Chuan, what brings you here?" Lin Chuan's father was sitting behind his desk. The door wasn't closed, and he could see Lin Chuan peeking out from behind it.

He could only put down his work, go outside, and lead Lin Chuan to a secluded corner. He asked Lin Chuan, "Xiao Chuan, what brings you here?"

"Dad, I've learned how to use the Water Dragon Bullet. When you see Grandpa Maruboshi Kosuke, invite him to our house," Lin Chuan said, looking up at his adoptive father and revealing the purpose of his trip.

"As expected of my son, he learned a B-rank ninjutsu so quickly." Lin Chuan's father couldn't help but smile when he heard that Lin Chuan had learned the Water Dragon Bullet. However, because this was the Hokage Building, he managed to suppress his laughter.

He said that Ogawa was a very opinionated kid, and he probably wouldn't come looking for him unless there was something wrong. Learning the Water Dragon Bullet technique was indeed something to be happy about, but...

"Ogawa, Kosuke-senpai just went on a mission and we'd like to invite him over, but it'll probably be a while..."

"Easy, there's still time." Lin Chuan's furrowed brows relaxed when he heard that a mission had been launched. He was just here to inform his father that since Maruhoshi Kosuke wasn't there, he could practice the Water Dragon Bullet technique for a while longer.

During his subsequent ninjutsu training, he would dedicate all his time to practicing the Water Dragon Bullet, even stopping practice of the Body Flicker Technique and Water Chaos Wave, using all his chakra to power the Water Dragon Bullet practice.

"It will probably be ten days to two weeks. I will invite you to my home then. You can do your best. I'm going to work now." Lin Chuan's father gently patted Lin Chuan and turned to go to work.

He knew exactly what his son wanted to do. The two had already discussed it. Even if he couldn't become Maruboshi Kosuke's apprentice, he could at least learn a simplified version of the Water Dragon Bullet from Maruboshi Kosuke.

When he teamed up with Kosuke Maruboshi, he had seen Kosuke Maruboshi use a simplified version of the Water Dragon Bullet, as well as the opponent's elusive genjutsu swordsmanship. He didn't think that was something an ordinary genin could master.

During a picnic, someone asked a question, and it was then learned that Maruboshi Kosuke had learned ninjutsu from the Second Hokage. Coupled with his considerable strength, no ninja teaming up with him would ever consider him a genin.

Judging from the strength the other party displayed, it was already comparable to some Jonin. If he were to team up with the other party to do some low-level missions, there would be no danger to his life. Most ninjas had been saved by the other party, including himself. That was a life-saving grace, which he always remembered.

……

After watching his adoptive father leave, Lin Chuan was about to leave as well, but as soon as he turned around, he heard the sound of a cane and his gaze instantly locked onto a strange man with bandages wrapped around his arm and right eye.

The moment he saw this person, the hairs on his body stood on end, and alarm bells rang in his mind. What bad luck! He actually ran into that old bastard Danzo here. He should have known better than to come to the Hokage Building. He could have waited until his father got off work.

Faced with Danzo approaching, he could only stand still, not daring to move. After Danzo walked in, he bowed slightly to Danzo to hide the timid expression on his face.

There was no other way; a newbie character had encountered a max-level boss, so he could only do this, hoping not to attract Danzo's attention.

I've been to the Hokage Building so many times before and never ran into Danzo, but today I suddenly did. Hiding is out of the question; my cheapskate father works here. Where can I hide? Am I supposed to become a rogue ninja?

Tread-tap-

Danzo, who was walking towards them, paid no attention to the child and walked straight past Lin Chuan until he disappeared around the corner.

Lin Chuan got up and watched Danzo disappear around the corner. He secretly breathed a sigh of relief and walked towards the mission department's exit, returning to his usual training ground to continue his training.

However, Danzo was far more shrewd than anyone. Upon hearing the ninja academy's bell, he immediately stopped, sensing something amiss, and asked the empty corridor, "Ninja academy today?"

"Lord Danzo," the shadowy figure appeared instantly as Danzo spoke, kneeling on one knee behind him, and reported, "Today is the first day of the Ninja Academy..."

"That kid from earlier?" Danzo instantly thought of Lin Chuan from earlier. He wasn't at school on the first day of school. What was a kid doing here?

"Lord Danzo, that child is the one you specifically asked to keep an eye on. He often skips class in the afternoon, and he probably skipped class again today." The Anbu were very clear about Lin Chuan's situation. Even if Danzo had forgotten, they still had to know everything about the child Danzo had specifically asked for.

"Interesting, skipping class on the very first day," Danzo said, somewhat speechless, as he continued walking forward, asking the shadowy figure, "Tell me about that child's current situation..."

Danzo didn't have the energy to pay attention to a child right now. If he hadn't run into him here and asked his subordinate a question, he would have almost forgotten about it. After all, there was the more important matter of the Uchiha clan waiting for him to deal with, the armful of eyes waiting for him to collect, and the transplantation of Hashirama's cells. He was not far from getting the technique he wanted.

……

Two weeks later...

When Maruboshi Kosuke came to the mission department to hand in his mission, he kept thinking about the other party's father, Hayashi Kawa. During the mission handover, he took the opportunity to invite Maruboshi Kosuke to his home as a guest.

"Senior Kosuke, you've successfully completed the mission again. You're truly amazing," Lin Chuan's father exclaimed as he took the mission scroll, praising the veteran senior.

"Haha, nothing at all. It's just a regular genin escort mission. There's nothing dangerous about it." Maruhoshi Kosuke was an old acquaintance of Lin Chuan's father. He took Lin Chuan's father's praise as a joke and didn't take it too seriously. They would often make jokes when they did missions together before.

"Does Senior Kosuke have some time these next few days?" After exchanging pleasantries, Lin Chuan's father immediately got to the point. After all, everyone was busy, so there was no need to waste time with small talk.

"I have time. I don't know why you're asking this?" Maruhoshi Kosuke took the final payment for the mission and was somewhat curious about Lin Chuan's father's purpose.

"Oh, it's like this," Lin Chuan's father organized his thoughts and said what he had been thinking about for the past few days: "I often tell my son about our experiences on missions when we were young. That kid really admires Senior Kosuke. I'd like to invite Senior Kosuke to our house for a visit, and maybe he can give that brat some pointers..."

"Oh, so that's what it is!" Maruhoshi Kosuke didn't think much of it, assuming it was just an old friend catching up. Since his mission had just ended and he didn't plan on going on any more missions soon, he readily agreed. "The mission's just finished, I need to go home and rest. I'll come visit again tomorrow or the day after!"

"Alright, remember to let me know when Kosuke-senpai arrives so my wife can prepare some snacks to go with the drinks. We haven't had a drink in a long time," Lin Chuan's father said excitedly when he heard that Maruhoshi Kosuke had accepted the invitation.

They have successfully taken the first step. Whether Ogawa can learn the simplified version of the Water Release ninjutsu depends on that kid's abilities.

"Haha, no problem, no problem, I'll be going now," Maruhoshi Kosuke said, taking the remaining payment for the mission, bidding farewell to Lin Chuan's father, and happily leaving the mission department. The drinking session between the two was thus arranged.

……

Two days later, it happened to be a pleasant weekend...

Carrying a bottle of wine and a bag of fruit, Maruhoshi Kosuke quietly arrived at the door of the Hayashi family's wooden house and knocked on the door.

"Kusuke-senpai? You've arrived so early!" Lin Chuan's mother had been informed that Maruboshi Kosuke would be visiting their home in the next few days, so she had been keeping an eye on it all day. She was overjoyed to see Maruboshi Kosuke arrive.

Seeing the fruit basket in Maruhoshi Kosuke's hand, he said somewhat embarrassedly, "Kosuke-senpai, you've come all this way, why did you bring anything? It's so hot outside, Kosuke-senpai, please come inside and sit down. Ogawa is practicing ninjutsu in the backyard..."

"That kid Ogawa can already learn ninjutsu?" Maruhoshi Kosuke took the fruit basket from Lin Chuan's mother. He was now more interested in Ogawa, whom Lin Chuan's mother was talking about. After all, he had learned from chatting with Lin Chuan's father that Ogawa had just started school.

For a child who has just started school, it is already quite impressive to be able to learn the Three Body Techniques taught at the Ninja Academy. It is truly remarkable that such a young child is learning ninjutsu!

"That kid learned from his dad, he's just practicing blindly, I don't even know if he's mastered ninjutsu," Lin Chuan's mother also knew what the father and son were up to, they were both acting, they were acting masters of the family, and she took the opportunity to lead Maruhoshi Kosuke to the backyard.

Leading Maruhoshi Kosuke to the backyard, she immediately served him the tea that had been prepared beforehand, and poured him a full cup before standing up and saying, "Kosuke-senpai, the one by the pond is Ogawa. This is some chilled tea that's been brewed. My husband won't be home from get off work for a while, so please sit here for a bit, Kosuke-senpai. I'll go prepare dinner now..."

"No need for that trouble," Maruhoshi Kosuke said, somewhat moved by the politeness of Lin Chuan's mother. After all, he was just a lone wolf and an insignificant genin, and he felt that this family was being too kind to him.

"We're all guests here, so please enjoy your meal, Senior Kosuke. Your husband has been talking about you for a long time," Lin Chuan's mother said with a smile, exchanging a few more pleasantries before turning to go to the kitchen to prepare dinner.