Youkai no Bikou (Naruto x DXD)

Disclaimer: This story is fiction. All the characters, names and places belong to their respective owners.

Information: Kyuubi (Nine-tails) race is modified a bit in this story for it to be more logical. They have three forms. Human form, which is just human to interact with the human world (all youkai have it because Koneko Toujou looked completely human before she shows her tails and ears), sealed form, which is fox-hybrids with corresponding numbers of tails depending on their powers, and released form, which is full nine-tails. The released state is for combat since they took on titanic size. Most Youkai just usually stay in sealed form in their capital to show their ancestry.


=[Self Reflection]=
1

"Found you!" A child-fox called out. He appeared to be twelve years of age. Looks can be deceiving with their race as they matured at different rate, however.

He pulled away the foliage cover to reveal another of his kind. It was a female with three golden tails wrapped around her lower body like a belt. She also appeared to be around his age. They were playing hide and seek, and he was it. A bright smile crept across his face as his golden irises focused upon the girl. He swished his four tails back and forth behind him proudly. Even though their kinds can transform into a true Kyuubi in their full released state with complete set of nine-tails, the number they had in their sealed state determined how powerful they were.

"Am I first?" She asked cutely.

He nodded with a smile.

"Why do you always find me first?" The girl asked with a pout. She was sure that she was well hidden during all the participated games, but she was always the first to be found whenever he was it. It had happened way too often to be a mere coincidence.

The boy simply grinned at her question, turning around with his arms wrapped around the back of his head and playfully kicking some dirt in front.

"Yasaka-chan, I will always find you wherever you are. It's a promise," he announced without facing her and ran off to find the rest. A red tint covered both of her cheeks, but they were missed entirely by the boy. Maybe he was blushing as well and couldn't gather enough courage to face her when announcing that.

She watched his back for a fraction of a second before running after him. Why did he promise that? The first time he found her was a complete on accident. That was a year ago when she got lost and hurt herself during one of her personal explorations. Being part of nobility, it became a commotion when she turned up missing. Afraid and alone in the woods, she could not move from her injury. She was frightened, but luckily, a blond-haired boy found her and carried her home. Her parents were less welcoming to him due to his low-birth and mixed blood. But regardless, the two children promised they would be friends, and if she were ever lost again, he would definitely find her again.

He was her first friend, and as such, she sneaked out of the palace to play with him whenever there was an opportunity. It was the start of a beautiful relationship, and perhaps, it would last a life time. At least she'd hoped so.

"Dad! What'd happened!?" The boy called out in panicked, seeing the wounded form of his father the moment he opened the ransacked door to his home.

The man smiled at the child and tried to sit upright, but failed miserably. He was too injured, and every little movement caused his body to ripple in pain. Most of his attire was dyed in deep shade of red.

Blood. It was his.

"I lost and was punished for it," he answered his son. He was expelled from his peerage by his master for being weaker than the rest. He was the first one to lose in the game. He tried his best, but that simply wasn't enough. Even with the devils, social standing meant everything, and the rating game feed their needs. They didn't bother to heal his injuries and he had to crawl back home in disgrace.

Tears filled the boy's eyes, pulling on his clothing as he coughed raggedly. Blood streamed down the corner of his mouth. There were a lot of regrettable things in his life, he admitted. He didn't return back in time to comfort his wife's in her last moment. She died in childbirth sorrowfully, and now at the end of his life, he only wanted to see her again. Still, all he ever did was to create a better future for her and his son. Sadly, power was everything in his world, and he simply lacked it.

"No, you're strong, dad! You are! You're the strongest! No one is stronger than you!"

"Kurama. I know my own strength… my own limit," he struggled to say. He swallowed the crimson liquids, mustering his remaining strength and continued. "This is a world where powers equate to prestige and recognitions. I couldn't gain it no matter how hard I tried. I have passed my prime. My ability won't advance more than they are now. But you are different. You're still young and you've show them that you even you were not of pure blood, you can surpassed them!" He announced loudly before falling back to a weak voice. "I am so proud of you… be strong… strongest… always…"

It was the last encouragement he could give. The man voice ragged at the end as his strength finally left him. He was contended of seeing his son the last time. He closed his eyes to enter the eternal sleep, where his wife would greet him.

"Dad! No, wake up! Don't sleep! HELP!" The boy shouted desperately, running outside looking for help to save his father, but no one stopped to help him. A few bumped him along the way as if they didn't even notice him at all. He clenched his hands, seeing his father blood on it as countless Youkai passed him, heading off to do their own thing.

He realized then. Without powers and recognitions, he was a no body. He was just a nameless pebble in the stream of endless people.

"You're not weak! I promise dad, I will be the strongest, and my name shall be feared by all," the boy made a vow as his youki spiked up. His powers were fueled by emotions as he continued watching the fox-fire he produced consumed the only family member he had left in this world.

Another tail grew behind him, joining the rest as they swinging back and forth behind him. He now has five in total, and with it, his demonic energy doubled. Perhaps this was the moment that the cheerful boy changed, and from that day onwards, to him, power was everything. Those that stood on top were truly the strongest and most revered.

In contrast, she only wanted to stand by his side even after he had changed. She trained and practiced tirelessly, hoping to be strong enough to change the broken system of their society. Due to her purer bloodline, her powers eventually exceeded his as she was the first to gain ninth tails even though he'd worked harder than her. She became the pride and joy of the whole inner capital while he was pushed back into the shadow. And like all living things, her parents passed on, allowing her to take on the mantle of leadership to ensure the stability of Kyoto. She took it with pride and used her newfound authority to erase the distinction between classes.

Soon after ascending to her birthright, she required to continue her line as there must always be one true kyuubi for the safety of their home. Without a shred of doubt, she chose him to be her mate even against her parents' previous wishes due to his mixed heritage and bloodline. He couldn't refuse and accepted reluctantly. Sadly, the boy she loved was obsessed with powers as he continued to strive for it every waking hour.

Do powers change people? Yasaka'd asked herself. She hoped it wasn't the case and yearned for a day that happy and cheerful kid would return back to her like the beautiful and bright memory she always cherished.

XxXxX

With each step, the pavement cracked under. He was truly strong now, and far more powerful than he had ever been. His immersed youki was leaking from him in unmatched level, infecting the surrounding while chakra was roaming throughout his inner pathways, enhancing all his natural ability passively.

His memory came back in full and fused with the ones he already had. He was still Naruto Uzumaki, but he was also Kurama, the youkai from the slum of the inner capital. He was not the current Kurama in his gut, but the one before that. They had shared almost the same childhood, desperately wanting to be acknowledged. They were more alike than they knew, and now, they were one and the same.

"Hey, I'm sensing a different kind of energy inside you. It's not chakra. What is it?" Kurama questioned from the mindscape, opening one of his eyes to examining the surrounding. He was snoozing previously, but strange energy was invading his comfort zone. He didn't like that one bit as it felt foreign to him.

"It's called youki, furball. Demonic energy! Get used to it. Now, shut the fuck up. I'm busy trying to find a way home," Naruto snarled agitatedly. He then stopped running and had a careful examination around the area. Everything looked different than what he'd remembered. The streets and roads were a lot cleaner, and there were many more buildings erected on each side of the path.

Kurama let out a small growl at the insult, but didn't say anything more than that before drifting back to sleep. Whatever was going on with the blond had made the idiot grumpy, and it didn't want to deal with it right now.

"How long have I been gone?" He asked himself while blinking. There was strange aura lingering around Kyoto. It was a very familiar aura to him. He immediately knew who it belong to, but it was everywhere, which was odd. He didn't know the reason for that so he decided to ignore it for now. He had more important thing to do like looking for the entrance back to the inner capital. Luckily, the entrance was located at the same spot, where the Kinkaku-ji, Temple of the Golden Pavilion, stood.

Passing through a secluded torii, a traditional shrine gate, within the temple while flaring his demonic energy, the airspace in between the pillar distorted. He entered the newly created portal and emerged into a completely different world. It was a world stuck in Edo period with ancient houses lined up along the sides of the gravel street with all kind of creatures revealed their faces from the doors, windows and passageways. They stared at him with curiosity as he walked them by in his human form, but they quickly returned to whatever they were doing as his demonic aura was felt.

"Finally. I'm home," Naruto looked at the palace ahead as he passed through the forest. He missed the place as he felt like he had been gone for years.

He was gone for years.

With a powerful leap leaving behind a sizable crater, he jumped over the palace wall, and crashed through the roof of a massive mansion after falling back down again. He fell all the way through to the floor along with the newly made debris in his entry. The destroyed materials were clattering on the waxed marble floor as he landed. He didn't want to wreck his own home, but he wanted to make a flashy entrance. Breaking through the roof was a good way to it, and it definitely got everyone's attentions.

"WHERE ARE YOU BITCH!? GET YOUR ASS OUT HERE FOR SOME NEEDED WHOOPING! IT HAS BEEN LONG OVERDUE!" Naruto roared as his immersed demonic aura filled the hall.

Everyone inside was more than a little stunned. They were not at his demand, but at his intrusion by breaking through the roof. They tilted their head upwards, seeing a newly made hole in the roof as pieces of timbers and tiles still dangling off the edges. It would take a bit of time and money to repair the damage. They returned their head back to normal level and stared at the new comer.

"Who is he?"

Naruto glanced around, seeing some strange faces along with a couple of familiar ones. Everyone was seated in the hall along each side with another person situated at one end on her glorified seat. The throne was the symbol of a ruler, and Naruto wanted to seat on that for a long time. He could now, but unfortunately, it was already occupied by a certain golden-haired girl. The girl was wearing a fancy feathery kimono like a princess from the warring states era. To her sides were fox-lady and a long-nosed old man.

"Who are–," the leader of Tengu called out, but couldn't finished when the blond vanished from the spot right before his very eyes, leaving behind a swirl of leafs. Where did that come from?

Startled, everyone snapped to where the intruder had gone as they stood up from their seat. The person they were looking for was now leaning over their host. He moved his face closer to the girl as everyone took a few steps towards him. He narrowed both blue and golden eye as she returned the gaze with her twin golden unflinchingly. She was trying her best to keep her calm composure. It was bit scary, but she would not show any fear.

"Fast, did anyone saw him move?"

"Oh, the Oppai dragon couldn't see anything besides breast?" The fallen angel joked, but inside he was surprised. Whoever this blond was, he was incredibly fast to the point that the angel barely made out his movements.

Azazel turned to face Serafall, who remained silence, in order to see her reaction. She was also having difficult time of following his movement and gave a small nod.

How many steps did he take? Was it three or four? Serafall asked herself.

"What do you think?" Azazel asked.

"I'm not sure, he's very fast and he felt like a Youkai. If that was the case then he would not harm Kunou-chan," Serafall replied thoughtfully.

Azazel nodded.

The fox-lady and Tengu quickly entered their stance to defend their ruler at the moment of notice even though she was temporary until her mother could be found. They both were wondering who this man was as he looked oddly familiar. Where had they seen him before? Regardless whoever he was, anyone bringing harm to their princess would face their wrath. They would lay down their lives for her sake.

"How dare you–," Kunou began, but her cheeks was pulled apart by strong grips. She looked about eleven year old, but with their race, it was difficult to tell how old they really were.

"Skoop dtat," Kunou demanded. Once he let her go, she rubbed her slightly puffy and reddish cheek afterwards. That was very rude of him.

"How dare you do that to Kunou-sama!" the fox-lady shouted alongside the Tengu.

Naruto glared at them as his killing intent erupted and gave each ones a potent dose. It was a new ability he gained, and they saw flashes of their gruesome death before shivering. They almost slipped into unconsciousness from the mental assault and dropped down to their knee soon after. They never experienced killing intent before and had no previous built up resistance against it. With a smug on his face, he returned his attention back to the girl.

"What just happened?"

"He did something to them, but what? I did not see."

"Yasaka!? Why are you a child? What the fuck!? How long have I been gone? Hang on, that makes no sense. You should be older, not younger," Naruto vented. After he was done, he noticed the girl didn't have all nine tails like his wife should have. The tails she showed were clearly visible so she must be in a sealed state at the moment.

"I'm not my m –

"Who are you?" Naruto interrupted, realizing this girl was obviously not his wife. She looked very much like her from long ago when they were children.

"I am Kunou. I am the daughter of Yasaka, the administrator of the youkai living in inner and outer Kyoto. Now, I demand you to state who you are and the reason why did you break in here?" Kunou requested haughtily.

Naruto was in shock. How long had he been gone? He didn't remember his wife was pregnant when he ran off on that day before meeting the Sage. That meant…

"THAT UNFAITHFUL BITCH! SHE DIDN'T LET ME DO IT AND SHE GONE AND DID IT!? I'M GOING TO KILL HER WHEN I SEE HER!" Naruto roared as the whole building shook from his fury.

Azazel and Serafall were now more than alarmed. The amount of demonic energy being released by the blond was on par with an Ultimate-Class Devil, and worst yet, the amount he was releasing increased exponentially. It showed no hint of even slowing down.

"This felt like Sairaorg-san," the boy with brown-haired muttered with dread as he fought with the heir of the Bael Clan earlier in the week.

"It feels slightly different than normal youki," said the girl with long, light brown hair and violet eyes. It was interfering with her angelic power more than it should have.

"WHERE IS YASAKA!? WHERE'S MY WIFE!?" Naruto demanded from the Tengu, who was still huffing heavily from being mentally assault.

"Wife… Kurama-dono?" The Tengu asked while the fox-lady was speechless.

It had been years since Kurama had run off. They didn't chase after him as he always returned again when he done venting, but the last time was different. When he didn't return for days, Yasaka became worried. She then ordered them to send out people for him as she could not leave the capital herself, but despite their effort, no trace of him could be found. He simply vanished, and they thought the worst had happened.

Looking closely, the blond did look a lot like him, only that he was slightly taller and broader. He must have grown in those years away, but where had he been?

"I go by the name Naruto now," Naruto said, lifting the Tengu up by the collar. "Now, where's the fuck is she!?"

"Kur…"

"I said Naruto," Naruto corrected as he was more comfortable with that and Kurama was the sleeping furball's name.

"Naruto-dono, Yasaka-hime has been attacked and kidnapped when she left to meet up with an important messenger from Mount Meru. Her whereabouts is currently unknown, but from what we deduced so far, she must still be in Kyoto as nothing has happened to the city yet. We were able to acquire some leads from our allies; it could the work of a Khaos Brigade. If that was the case, her life is in great danger. Since you are back, Kur… Naruto-dono, we should able to find her quickly with your help," the Tengu explained while everyone remained silence, watching the display.

Kunou was a bit confused. Her mother never told who her father actually was, only that he went somewhere and would return one day again. She was hoping for the day that he would return, but this wasn't the family union she had imagined. Her mother was kidnapped and her father wanted to kill her mother.

Naruto raised an eyebrow at the long-nose elderly man as he took in the information. He thought for a bit before letting go of the Tengu. He turned back to the girl, who was still sitting on his seat.

"Get off," Naruto ordered.

Kunou blinked in surprise, but didn't comply.

"I said GET OFF!"

"Please, Kunou-hime, come here," the fox-lady requested as the girl vacated the throne and stood by the woman's side.

Naruto sat down to his rightful place, feeling very proud for one reason or another. He leaned back a little and eyed everyone in the room before him.

"So someone went and captured her huh? If she dies then that means I will rule right?" Naruto asked nonchalantly. They all had their shocked faces on from the question. They weren't sure if he was joking or not, but it seemed less likely from his demeanor.

He was being serious?

"You bastard, how you could let someone like that die!" The brown-haired called out.

Naruto paid some attention to the boy, who seemed more upset than him for some unknown reason. It wasn't his wife that got kidnapped so why he seemed to be so upset? Naruto immediately formed some theories in his mind.

"Mother can't…" Kunou began, but was interrupted.

"Naruto-dono, you… can't be serious. If Yasaka-hime is killed, then Kyoto will undergo some very dramatic changes. It would be the death of us all," the Tengu advised from the side while the fox-lady held Kunou tighter.

Naruto licked his lips a little at the comment. He knew what the Tengu was hinting at. A nine-tails was a must for Kyoto. Their existence was responsible for maintaining the balance of Ki flowing from the different areas of this land. Without one, chaos would erupt, and the first thing would happen was their city merging with actual human's one.

Furthermore, Kyoto was a giant magical bomb that would go off if no one were there to maintain its magical flow. It would be disastrous if all that power was not channeled anywhere.

Power… hmm… Naruto thought.

"It is fine. We don't need her, I will suffice," Naruto replied before materializing nine crimson red tails behind him. Slit soon appeared in both different colored eyes. The tails were no longer golden fur like he once had, but since he had nine and was a true Kyuubi now, he could displace Yasaka and took control of Kyoto as well as maintaining the force field around their home to keep it safe.

Absolute powers were at his command, and it was what he always wanted. The Tengu could not utter a word from seeing the ominous tendrils behind the blond while Kunou was more than frighten at the bloody red menacing tendrils. It wasn't like her mother's at all. There was no warmth radiated from them, only endless dread.

"Is there anything else?" Naruto asked calmly, glancing at the rest of the people in the hall. There was a devil, an angel, and a fallen from their aura. Members of three great factions were here. He could feel it as his senses were greatly enhanced. He used his ability to decipher their intentions. At the moment, they show no malice so he let them be, but that could change very quickly.

"Otou-sam…"

"I AM NOT YOUR FATHER! DON'T CALL ME THAT!" Naruto snapped at the girl. His hands clenched, trying to restrain himself from killing the child outright. He was more than furious at his wife, for he was sure that Kunou was not his daughter. She was born after he left so it could not have been. It wasn't that long since he disappeared and his wife had changed her heart.

The little girl flinched. Kunou didn't know what the he meant, but tears invaded her eyes from the rejection while the fox-lady tried her best to comfort the young princess.

"Naruto-dono. I can assure you that Kunou-hime is your daughter," the Tengu asserted.

Naruto leered at the youkai. Taking a breath to calm his raging heart, he cocked his head to face the Tengu. "How is that so? I left before she was born so she could not be my daughter," he retorted. Why was he so angry with her? Was it because she broke her oath? Or was it she didn't tell him? Which was it?

The more he thought about it, the more his rage spiked.

"She is, Naruto-sama. Kunou-sama was born less than a year after you disappeared," the fox-lady assured while holding the shivering girl in her gentle arms.

"Is that so? That still did not make her my daughter. The bitch could mate with someone else after I'm gone and gave birth to her," Naruto retorted again. They been married for a while and she still gave him no children. It was a one of the reasons why he wanted to mate with another instead, but Yasaka didn't like the suggestion and she expressed it physically on his body time and time again. Since that was the case, there was a high chance that Kunou could not be his.

"But… but mother said she only loves one person…"

"If that was so, why did she name you Kunou? It means suffering… was she suffering with me?" Naruto snorted.

Kunou blinked. No! That wasn't true. Her mother had said her name was…

Tengu whispered something into Naruto's ear as his eyes widened. He then face palmed at the misconception and assumption on his part.

"Sorry, my bad, Ku-nou, nine-weights, but that doesn't prove anything," Naruto apologized and reasserted his stance on the matter.

"Ah, excuse me, but you should get a blood test or something along that line instead of guessing," said a tall man appearing to be in his twenties with an average build, black hair, golden bangs and black goatee. Azazel decided to speak up finally, seeing how this was going very badly.

Naruto rolled his eyes at the suggestion. Since his bodies had merged, a blood test would not work anyway. Too much things had changed, and the changes had bothered him more than a little. For one, their capital would not allow anyone that was not a youkai in. Foreign messenger and diplomat come and go, but only one at a time. However, there were five people that were not supposed to be here at all.

"Who the fuck are you?" Naruto decided to ask with some irritation.

Azazel's eyes twitched at the demand. While the fallen angel was quiet laid-back and let things slide pass him, he didn't like being insult right in his face. The black-haired man exhaled, letting it go. They were guests so they shouldn't escalate thing.

"My deepest apology; my name is Azazel. I represent the Fallen Angel Faction. It is an honor to meet you, Naruto-dono," Azazel greeted before introducing the rest of the people with him.

Serafall did her own introduction, however. She tried her best not to give him any form of nickname.

Naruto had a brief glance at each one that was introduced with a nod. "I'm Naruto and that's all you need to know," he said.

"With the introduction out the way, you can all leave as this problem no longer concern you," Naruto said, outstretching his hand and showing them the entrance at the other end of the hall. He had decided he will find his wife and get the truth out of her one way or another.

"Hey, wait a minute! We here to help Kunou-chan and rescue onee-sama," Issei declared, not wanting to leave just like that. He wanted to see massive breasted Miko in person. That wasn't the only reason though, but it was the one that stood out the most.

"Hah, please, the Oppai dragon only wanted a reward," Azazel snickered a little as a joke.

Xenovia, Asia and Irina were nodding their heads and gave their jabs as well. Sadly, they couldn't have known that Naruto didn't like comment like that about his wife regardless whatever he felt about her right now.

"Reward…" Naruto muttered then his mind clicked.

"I'LL FUCKING KILL YOU!" Naruto roared after understanding what the fallen angel had meant and disappeared from his seat in a swirl of leaves.

Serafall and Azazel immediately tracked the blond's movement and intercept as fast as they could. They clashed before the blond could carry out his declaration, which would definitely result in a dead pervert in the most gruesome manner.

A boom exploded from the collisions as the three combatants flipped back to disengage. Both Serafall and Azazel felt their arms pulsated in pain. Naruto clenched his fist from the opposite side, checking the hand and realized these two had enough strength to block his attack even if he was somewhat serious at killing the pervert.

"YOU GUYS GET OUT OF HERE! NOW!" Azazel ordered and realized his mistake.

"I wonder how strong I am against the great Azazel and Leviathan," Naruto said with a smile as his body was coated with flickering with reddish aura. Youki and Chakra propagated through his limbs as his eyes became sharper; the blue one had golden tint around it while the other was vice versa.

"Please wait, Naruto-dono," the Tengu beseeched but it was too late. Naruto disappeared in an orange flash and smashed his full strength, capable of shattering multiple buildings to rubbles, right into Azazel's solar plexus before the man realized what had just happened.

Azazel might be able to block the strike if he wasn't stunned at the speed that was displayed. He felt several of his ribs cracked under the blow as he gasped in pain.

Serafall's eyes widened. She couldn't track the blond at all. It was like he wasn't moving and more like teleporting from one point to another instantly. What kind of ability was that? Also, what this strange aura around him? It seemed to become thicker each passing second.

"Senjutsu!?"


Author Note:

I was going to have Naruto fight Issei and whatever Rias' peerage there, but it more like swatting a fly than anything and it wouldn't fun to write about. I mean the battle would last one paragraph, so I'm having Naruto fight Azazel and Serafall instead.

All Naruto's ability are modified right now, his Senjutsu are hybrid between Shinobi and DXD universe. Yes… he grew more bloodlust the longer it's active. His strength, speed, defense kept on increasing due to Touki (Fighting Spirit) and infinite chakra. They make the aura coating denser every passing moment and ever more increasing devastating strike. Think Issei's boost ability on endless mode.