Summary: Only a certain percentage of humans are aware of the supernatural world. Those who are were mostly trained to fight it. Naruto wasn't one of this humans. He came from another world and used the opportunity to live a peaceful life in this new world. He smiled and helped others and hoped that this wouldn't change. But as always: with great power comes great responsibility.

Disclaimer: I don't own Naruto or any other title that will be used in this fanfiction.

Warning: English isn't my first language.

"Speech."

'Think.'

"Spirit of Sacred Gear/Giant Creatures Speech."

'Spirit of Sacred Gear/Giant Creatures Think.'

Memories of the Past/Flashbacks


'Hmm, I should go to the forest again. I haven't been there for two weeks.' Naruto Uzumaki thought. Naruto was a muscular young man of 18 years old. He had sky blue eyes that reminded of the endless expanse and golden blonde hair that looked as if it had been kissed by the sun. He had 6 exotic whisker marks on his cheeks. He wore a black blazer, dress shirt, trousers, and shoes. This was the boys' male school uniform at Hijirigasaka Academy in Tokyo.

School had just ended and so students were currently streaming out of classes and heading either towards a club or towards the exit because the students wanted to go home. Naruto was walking out of the building, smiling as he did so. No matter how much he had experienced in his life, he never stopped smiling.

Be it back in Konoha, where he was still ignored as a Jinchūriki (Power of Human Sacrifice), used and similar things were done to him... when he became a genin and wasn't recognized by his team at the beginning... when he was only considered a weakling during the first missions… when he was seen as a good-for-nothing and in all other distances of his old life.

In the end, he managed to save the Elemental Nations and thus become the hero of the world. Unfortunately, he wasn't allowed to experience any of the glory because he died in the final battle with Madara Uchiha and then woke up again in this world.

It was strange adjusting to this world. Fortunately, he had certain knowledge from the beginning with which he could carve out a place for himself in this world. He didn't know why he woke up in this world and why he suddenly had strange knowledge, but he approached this like any other: with a smile and the will to never give up.

Naruto Uzumaki would never change, whether it was in the Elemental Nations or in the new world where there were no shinobi. In this world, the normal human was no stronger than a civilian in the Elemental Nations, which had no training in the use of chakra.

There were several complex systems here that allowed humans to become stronger than normal humans and take on the supernatural. Naruto had already seen some supernatural creatures and learned a lot about them. He had learned a lot from his master and even though he had died, he had taught him enough that Naruto knew his priorities here too. First, he needed as much information as he could get and even though he hated reading, he forced himself to read and learned as much about this world as he could. The initial knowledge he had was just enough to not stand out in this world. After all, there were cars, trains, planes, computers, TVs and other things that were rare or non-existent in Naruto's old world.

He had been here for 2 years now and had built a normal life in this world with enough money in his pocket, even though he was still a student. At first, he hated the idea of having to go back to school, but in the end this normal school life was actually quite pleasant. Although he always smiled and never gave up, he was happy to not always have to look over his shoulder because an organization like Akatsuki was after him. In this world he was a normal student who lived a normal life. He enjoyed the peace and quiet here in Tokyo.

As Naruto walked down the schoolyard to the large gate of the school grounds, he heard some students cheering. He had immediately realized that there were many women with curvy bodies in this world than in the Elemental Nations. The reason for the cheering was 3 girls who came out of the building next to each other. These were the three queens of the school and since this always happened, it wasn't new to Naruto. Everyone was adored by these three, girls and boys alike because they were so beautiful, so elegant and simply perfect in the eyes of most people.

Naruto had tried so far to stay away from the three beauties because he knew exactly what the three were. There were several types of supernatural beings, but mostly devils, fallen angels, and yōkai were found in the human world, with yōkai mostly found in the region around Kanto and Kyoto here in Japan. He had already been to both cities and had learned a lot about yōkai there. During the summer holidays he always used the time to explore Japan and train his skills. Some supernatural beings were very strong, approaching the strength of a Hokage, with some being even stronger.

The three beauties were all devils, and it was not uncommon for female devils, or female supernatural beings in general, to be particularly attractive. It was almost unusual for a female supernatural being to be unattractive.

He specifically stayed away from devils because they always tried to win over humans with special abilities and once a human was discovered, they would normally no longer find peace.

He had recently seen it with a classmate who was now a devil himself. He had been given a special ability called Sacred Gear. Sacred Gears were special abilities created by the God of the Bible for humans to help them defend themselves against the supernatural.

There were a variety of Sacred Gears, but no matter what it was: If a human had a Sacred Gear and a devil noticed it, then the devil would show great interest in the human. Devils had the ability to turn people into devils, who would then become part of the peerage. Especially when the Sacred Gear was strong, a person had no chance of escaping the gaze of a devil. Sacred Gears emitted a type of aura that supernatural beings could sense. With training, Sacred Gear users could suppress the aura that their Sacred Gear emitted, but this was mostly not possible for humans. They usually only found out that they had a Sacred Gear once they had already become devils.

Naruto walked off the school grounds and turned left and made his way to the outer part of Tokyo where his house was. He had made a lot of money in this world through gambling and so he already had an entire house to himself, even though he was just a student and had no parents.

The sun shone down in Tokyo as usual, delighting all the people, animals and other creatures that were in the area. Naruto closed his eyes and let his instincts take over. He avoided everyone, even though he had his eyes closed and couldn't see anything.

He stopped when he sensed something nearby. The life force of a living being was in the process of running out and slowly dying out. He opened his eyes and looked towards the big park that was in Tokyo. He walked towards the park, crossing the street as he went.

He walked for 2 minutes before coming to one of the many entrances to the park. He looked around and couldn't see or feel anyone and that's why he suddenly disappeared and appeared in front of a tree for a few seconds. Naruto looked at the ground right in front of the tree and could see an injured bird.

He knelt on one leg and slowly picked up the bird. He now held it in one hand and held the other hand over the bird. A white aura appeared around both of his hands, and then the white aura flowed into the bird. Naruto directly felt how the bird's life force became stronger and after 10 seconds the white aura around the hands and the bird disappeared. Naruto removed his hand from the bird and looked at it with a smile.

He felt the warmth again, which he had often felt before. This warmth, as if nature were directly thanking him. It was a pleasant feeling, hard to compare with anything else. He didn't know if other Senjutsu users also felt this warmth. He quickly realized that nature in this world was corrupt. In the Elemental Nations, nature was not so corrupt and when he tried to use Senjutsu in that world, he sensed this negative energy in nature itself.

It didn't take him long to master senjutsu in this world. After all, it was the only ability he could still use. It was quite a shock at first to learn that he no longer had any chakra and that his partners were no longer at his side. However, from the beginning he had the ability to sense the life force or ki in this world. He had gotten some help from someone in the beginning in this world when it came to mastering Senjutsu.

Senjutsu was the power to control the flow of life energy or ki in living beings. Using it, one could strengthen both their internal and external bodies or even cause vegetation around them to bloom or wither. Senjutsu users were able to sense the ki and auras of others thus letting them track targets from far away distances. It could be used to see through illusions by detecting the flow of the spirit or ki of others. Senjutsu was also capable of dealing interior damage to others by targeting their blood vessels and internal organs, and through disrupting the ki of their opponent's ki or severing it, it was possible to cause direct damage to their spirit and life-force and using this as an attack could result in killing their opponent. As such, there were very few ways to defend against Senjutsu. Senjutsu could be used to disrupt the aura of others, thereby preventing them from using their was also capable of forcefully putting others to sleep. By controlling the ki of others, Senjutsu could be used to extract curses and poisons from their bodies. Senjutsu could also be used to hide one's presence and avoid detection. Senjutsu also had healing capabilities that are effective for either one's physical or mental condition, relieving any fatigue and restoring one's lifespan, however, this method required physical contact.

Another common technique was called Tōki. Tōki was, in essence, the external manifestation of one's life-force, in other words their Ki, which would be wrapped around them as an aura. Using this, a person achieved increased offense, defense, and speed. It also had the added effect of damaging others from the slightest touch and defending a user from a wide range of attacks, while knocking their foes back too. Those were one of the most used ways of utilizing Senjutsu as a fighter.

Senjutsu was a very versatile ability that he could use to defend himself against all supernatural beings in this world. He could even control nature itself, such as the earth or plants and trees. He had mastered Senjutsu as far as he could and his control over nature itself was also undefeated. Using his knowledge from his old world about Hashirama Senju's Mokuton (Wood Style), he had tried to reconstruct some of Hashirama Senju's jutsus using his control over nature itself and plants. He had managed to recreate some jutsus and thus, even without chakra, Naruto was a powerful force in a world full of devils, yōkai and other beings.

The bird opened its eyes and hopped up on its two little feet. He looked at Naruto carefully and chirped briefly. Naruto stroked the little bird's head with his thumb and the bird closed its eyes and enjoyed the petting. After a few seconds, Naruto stopped, and the bird chirped briefly before flying away. Naruto looked after the bird and thought 'Good thing I made it in time.' Naruto thought to himself.

In the past, there were a small number of humans who, like Naruto, could use Senjutsu and made it their mission to protect and care for nature. Humans who became masters of Senjutsu were called Sennin.

Naruto was the last living Sennin still walking the earth. He had not consciously approached this inheritance, but he had also decided to take care of nature. Through his training in Senjutsu, he was much more connected to nature than he ever could have been in the Elemental Nations. Sennin also had increased lifespan due to their mastery of ki/life force through Senjutsu. It wasn't as different as the devil's long lifespan. Naruto wouldn't die of old age so quickly; he just didn't realize that yet. He had read about Sennin before and so knew that he was the last living Sennin, but he didn't know the side effect of having a very long lifespan.

Naruto stood up and brushed off his pants once. He would just go home for a moment and then go to a forest he hadn't been to for a while. He started walking, looking at the clouds.

As Naruto came out of the park, he saw some people wearing the Hijirigasaka Academy school uniform. 'Now what should I think of this?' Naruto thought to himself. He looked briefly at each student.

There was Rias Gremory, one of the three queens of Hijirigasaka Academy. She was a beautiful young woman with a voluptuous body, white skin, and blue-green eyes. She had a very curvy figure with massive breasts. She was wearing the uniform of the school, which resembled a white sailor uniform that had a black collar and black cuffs that had white horizontal stripes, an orange-colored tie hanging from the edges of her collar, a short black skirt that has a single white stripe, long black socks that had a red-colored ribbon around her upper thigh, and a pair of maroon-colored shoes.

Beside her walked Akeno Himejima, another of the three queens of Hijirigasaka Academy. Akeno was a beautiful young woman with a curvy figure and massive breasts, very long black hair and violet eyes. Her hair was usually tied in a very long ponytail, reaching all the way down to the floor with two strands sticking out from the top and sloping backwards, with an orange ribbon keeping it in place. She was wearing the exact same uniform as Rias.

On the other side of Rias was Mio Gremory, Rias Gremory's cousin and the last member of the queens of Hijirigasaka Academy. Mio was a beautiful young woman shorter than Naruto with long crimson hair reaching her waist and pink eyes. Just like the other two women, Mio had a curvy body with massive breasts. She was wearing the same as Rias and Akeno. Those three were part of the student council from the Hijirigasaka Academy.

Naruto knew that all three were part of the same peerage. He hadn't looked too much into the three of them, but he was sure that Rias Gremory was the King, Akeno Himejima was the Queen and Mio Gremory was a Bishop.

He got all the knowledge of the Evil Piece System from some old books that he got from a certain person. It was this person who initially helped him master his new skills. Through her he had gotten all the information about the supernatural world. Of course, he had to learn everything himself, but through this special person, Naruto had received many ancient books and scrolls, which allowed him to learn everything important.

In addition to the three queens, Yūto Kiba could also be seen. Yūto was a handsome young man with short blonde hair, bluish-gray eyes, and a mole underneath his left eye. He wore the same uniform as Naruto and was the Knight from the Peerage. He was like the three queens, also a part of the student council.

Next to Yuto walked Koneko Tōjō. Koneko was a petite girl with white hair and gold eyes. The front of her hair had two long bangs going past her shoulders and several loose bangs hanging over her forehead, while the back had a short bob cut. She also wore a black cat-shaped hair clip on both sides of her hair. She wore the exact same outfit as Rias, Akeno, and Mio. She was the Rook of the Peerage and a part of the student council.

Naruto saw that the group of devils were heading towards the outskirts. He was just glad that he was able to completely suppress his aura and thus just seem like a normal person. On the other hand, it would be difficult to stay away from this group of devils. They would notice him straight away, if only through Koneko. Koneko was not only a devil, but also a yōkai. Yōkai were also able to learn Senjutsu and with Senjutsu Koneko could sense him directly if he didn't suppress his aura. Whether she could do Senjutsu or not wasn't the point. Naruto just wanted to continue living peacefully among humans and taking care of nature.

Naruto sensed an aura nearby and recognized it immediately. The aura belonged to a person with special abilities. In addition to the normal people who had the opportunity to fight supernatural beings through the church, there was also a small group of people who had special powers. This group of people were called heroes. The Hero Clan was a group of people who received strength from a special group of gods. They were a neutral party whose mission was to protect normal people from supernatural beings.

Naruto knew the heroine personally and acted as if he hadn't noticed her two minutes ago. She just came around the corner and stopped when she saw Naruto. Naruto smiled and raised his hand. "Hi Nonaka, how are you?" Naruto asked.

Yuki was a beautiful young woman with a slim yet endowed build with a far more notable big butt. She had light blue, shoulder-length hair that had a longer portion of her hair put into a braid on the left side of her face tied into a single braid, as well as a single long strand of hair (also known in Japan as ahoge ) and yellow eyes. She wore the same uniform as all other female students from the Hijirigasaka Academy.

Yuki nodded "Hello Uzumaki, I'm fine." Yuki replied. As usual, she hardly showed any emotions. Her face was mostly stoic, but it wasn't as if she didn't show any emotion at all. When she was with a certain hero, she always smiled. Naruto was in the same class as Yuki and Mio. He was even sitting next to Yuki and so at some point they started talking and as Naruto was, he quickly became friends with Yuki.

"Heading to the park?" Naruto asked. The park was only 500 meters behind Naruto. Yuki nodded and said, "I'm meeting Basara." Yuki said.

"Oho? Have you finally made it?" Naruto asked with a smile. He knew full well that Yuki loved Basara. Basara was in the same class as him, Mio and Yuki. He was a hero just like Yuki and so the two had known each other since childhood. Both had grown up together in the Heroes' Village.

Yuki smiled slightly and nodded. That was all Naruto needed to know. He took a step to the side and said "Then I don't want to stop you. See you at school tomorrow, Nonaka."

"See you tomorrow, Uzumaki," Yuki said, walking past Naruto. Naruto looked after Yuki for a moment and thought 'She is going to watching Rias and her peerage like usual.' Naruto thought. He knew full well that Basara wasn't in the park. At least he would have felt him wherever he was in the park and even from further away. He just shrugged his shoulders and started walking towards his house.

After 30 minutes he arrived at his house. The Uzumaki Residence was a two-story terraced house with a white painted exterior, a balcony on the second floor and a red roof. There was a garden surrounding the house with a wall and a metal door, which you had to go through to get into the garden and thus the house. Naruto walked through the metal door and then went to the front door. His garden looked very normal with some bushes, trees and flowers. However, the entire garden was full of life because there were birds sitting on the ground here and there and also cats. The garden was brimming with life force, which Naruto used in his garden. He had practiced his control over nature a lot in his garden and over time he got better and better and at some point, the first bird came and built a nest on one of the trees and after a short time there were a few more. Naruto had a total of 8 trees around his house and in each tree, there were at least 2 bird nests.

Naruto opened the front door, walked in and closed it behind him. He took off his shoes and then stood to the side. He walked down the hallway, looking around. The wall of the house had several pictures of beautiful landscapes from a seemingly different world. Some were about nature, and some were about a large village in nature with lots of wooden huts and a large wooden tower in the middle. These were all pictures by an artist from England. He liked the pictures and bought them a year ago. After a few meters he came to the door to the large living room, which also led into the garden.

The living room had the normal furnishings that every living room had. A large couch that could fit several people on it, a small table in front of the couch and across the room there was a chest of drawers with a large TV hanging on the wall above it. On the side of the living room there were 2 small cupboards for other things like books, glasses or other things. There was also a large table in the room. Naruto's kitchen was rather small and that's why the dining table was in the living room.

Naruto sat down on his couch and picked up a book that was on the small table in front of him. He opened it and finished reading the chapter for a few minutes. He wasn't stressed about getting to the forest and since he had nothing else to do today, he took the time he needed. After 20 minutes, he closed the book and got up to go to the kitchen. He was still thirsty and wanted to have a drink of water. 2 minutes later Naruto walked out of his house and left his garden closing the metal door behind him.

He walked and looked at the clouds. After 5 minutes he stopped because suddenly everyone around him disappeared. He looked up at the sky and could see a red sky and the otherwise white clouds were now black.

"Extremely interesting," said a male voice. Naruto briefly looked to the side and then turned around. He saw a male devil who was stronger than the devils of his school. The devil was a tall man and wore a red jacket with yellow-padded shoulders. He had pointy ears, white hair with a matching beard as well as purple eyes.

"You have a Sacred Gear." The devil said and a black broadsword with purple decorations appeared in his hand. He just held it loosely at his side and held his other hand to his chin.

"I have to say, I'm interested in your Sacred Gear. Over the long period of my life, I have seen almost every Sacred Gear there was and felt the corresponding aura. But I don't recognize your Sacred Gear and judging by the aura, it seems to be a strong one." The devil said.

"I was actually on my way to see the Gremory cousins, but you definitely piqued my interest, human." The devil eyed Naruto and nodded analytically. He removed his hand from his chin and said, "How about it?" You show me what your Sacred Gear can do." Said the devil. "My name is Zolgear, I hope this shows some measure of gratitude. After all, I'll take your Sacred Gear from you either way."

"I don't own any Sacred Gear." Naruto said. He would probably know if he had a Sacred Gear. He was a Sennin; a master in senjutsu. But he didn't have a Sacred Gear and he didn't need it either. He already had enough power with his abilities.

"Hmmm? You're not even aware that you have a Sacred Gear?" Zolgear said interestedly. He analyzed Naruto's body language, his voice, his breathing and quickly concluded that Naruto was telling the truth. "Very interesting. The fact that your Sacred Gear radiates such an aura in its dormant state... just fantastic." Zolgear said.

"Now I have one more reason to incorporate your Sacred Gear." Zolgear said as a black aura appeared around him and the ground cracked. Naruto said nothing and got into a fighting stance.


Author Note: I hope you all enjoyed the first chapter of Irregular Human. I would appreciate a review about my writing style and the storytelling. Be aware that this is my first fanfiction, and I am still new to writing. I read many fanfictions and simply wanted to try my luck and see how I will perform.