The Lost Leviathan (NarutoxHighschool-DXD)

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

"Talking" – 'Thought' – Furball's Speeches MemoryLane/Names – (Thought Scenario)Important

The prologue will introduce three heroines of this story, as well as the tragic background of a Lost Leviathan following the civil war. It's two parts because I'm lazy.


=[Prologue]=
(Part 1)

"Why are you chasing me?" The eleven year old blond-haired boy shouted while dashing through the narrowed alleyway of the inner city devoid of bystanders. Following closely behind was a child about the same age with golden hair with matching pair of eyes.

"Why are you running?" She shouted back while dashing on all four like an enraged animal.

"I'm…" he began as his mind pondered about the question. He wasn't sure why he was running from her. Every time he saw her, she was obviously looking for him and instinctively, he just bolted since it felt like he did something wrong. "I'm not sure, you chased so I ran! Leave me alone, damn it! I didn't even spy on you, not after the first time!"

"So you did see it! You pervert! You're just like that idiot sage! Pervert! Pervert!" She growled as she lurched forward in the air with incredible speed in the form of flying kick. She would have pummeled him from behind if he didn't slip and fell and rolled forward. She sailed overhead and crashed through wall of the incoming building before going right through it, spraying wooden splinters inward.

The blue eyes boy blinked after lifting his head up from the dirt. He saw the human size hole in the center of his vision as a bead of sweat rolled down the side of his face. Dissatisfied moaning and grunting could be heard beyond the newly created opening. Without further ado, he pulled himself up and dashed the hell away from the possible imminent danger.

"Wait! I'm injured. You wouldn't leave me here would you?" She called out, but the boy was no longer in her view. She sniffed while rubbing her eyes with disappointment before checking her leg's wound and brushed away the debris. She then tried to stand upright. Sadly, the pain made her winced and staggered backward. She collapsed against someone behind, making her head smacked against that person's chin. The impact was hard enough for her to hold her head in discomfort as she looked at the fleshy boy that had cushioned her fall.

"Why did you hit me? I was going to help you," he protested while groaning and rubbing his chin while the girl was on top of him. "This is what happens when I try to be nice. Can you get off me now? I have to find ero-sennin wherever he is."

"Naruto-kun?... NO!" She shouted and hammered his chest several times cutely. "It's your fault that I'm injured. If you haven't dodged, then I wouldn't be hurt! You need to take responsibility and carry me home."

"Huh? That's not my fault! You chased after me and tried to kick me," Naruto retorted.

"That's because you'd spy on me! Stop copying your father! Do you know how many people have complained for his misconduct!? You shouldn't be like him! I don't want you to be like him!"

Naruto rolled his eyes at the misconception. It was stealth training, or so that was what his godfather had told him. Considering that if one got caught, one would be running for their life from the enraged female mobs. It was good training with dreadful risk. "Tsk… that was totally on accident, and I'm not interest in flat chest or a kid like – EKKK"

His blues eyes were about to bulge out as his neck was strangled by powerful grips. Her eyes had shifted into crimson slit as nines tails flustering behind her petite body. "What was that!? How about you take what you saw to the afterlife."

As he was being choked, Naruto tried to remove her hands, but she was much stronger than him. The air reserve within his lungs was not being filled despite his effort while trying to battle consciousness. He then tried to tell her to let him go, but every word got clogged up in the constricting tunnel. In his final desperation, he grabbed something he shouldn't have. It immediately earned him furious slap across the face, then several more afterward accompanied by crying of the girl.

"I can breathe, finally," Naruto gasped and coughed as he blocked the girl flurry of hands. "Stop that. I'm sorry, alright? And if you killed me then who will carry you home?"

The attacks slowed down as she rubbed her eyes and sniffled. "You will? You won't run away?"

"Uh huh, I promise. Can you get off me now?" He asked. He was about to say she was getting heavy, but that likely earn him another round of punches.

Yasaka piggyback Naruto out of the slump and into the crowded street of the inner city. There were all sort of supernatural creatures wandering about or peeking out from the Japanese styled house and business. Naruto knew where she lived as he was heading directly toward royal household. It was a massive mansion, built like a fortress, for the ruler of the city.

"Say, Yasaka-hime. Did you sneak out again?" Naruto asked as he felt a nod, brushing against his slightly spiky blond hair while her arms tightened around his neck. He was about to lecture her on running off without telling anyone since she was a princess and the one of the most important people, but his ears twitched as it captured the all too familiar clattering noise of wooden sandals from behind, which followed by furious shoutings.

"Ah, Naruto! You're here!" The white-haired man called out as he ran passed the blond in haste. "Run!"

"Eh!?" Naruto questioned and saw the enraged mobs chasing after his godfather. Fear filled his being he ran after the man and away from the mob. "What the hell! Why do you keep getting caught!? I thought you supposed to be an all-powerful sage!"

"Hahaha! It's good training," Jiraiya declared, slowing his pace so he could be alongside with his godson. He finally noticed the golden-haired girl, who was giggling, on the boy's back. "Ah, Yasaka-hime. It's nice you see here. WAIT! WHY IS SHE HERE!? DID YOU KIDNAP HER? GIVE HER BACK, YOU MORON!"

"I'm not going to say anything to that," Naruto snorted as he broke off into a different direction, but strangely half the mob chased after him. "Hey! Why are you chasing me!? I didn't do anything today yet."

"YET!? YOU BRAT!"

XxXxX

His blue eyes were saddened while looking at the swaying trees and rustling leaves as the gust of wind navigated between them. He was sitting on a wooden bench to side of the small hut that he and his godfather called home for the last fifteen years. To his side, there was a Tengu standing. The old youkai, who had served the royal household faithfully for many generations, waited for the blond reply.

"I have nothing to begin with so I don't need anything in the end. I must refuse the offer since she is not an object to be negotiated and sold," Naruto refused the very generous offer via proxy. The ruler of the city didn't even bother to come in person. The tengu was about to speak up, but he continued. "Please rest assured. Even if I didn't take it, I fully understand the predicament."

"I see. Thank you for understanding, Naruto-dono," the tengu said in the most polite tone. "If only there was another way to resolve this."

"But there isn't," Naruto claimed. "Maybe it was my wishful thinking, but she and I lived in a different world. So close, yet so far apart. I knew the moment my bloodline was reveal, I would lose my sanctuary so it was not a surprise. I do not blame her for telling her parents about it. I'm sure she had her reasons. It has been years since my godfather left without saying a word. I don't think he will return so there is nothing left for me here. Please tell your master that I will leave the capital before the sunset, and I will not interact with her for as long as I live."

The tengu gave a nod with a sorrowful expression before flying away out of the secluded forest. Naruto watched the man before paying attention to the sky in order to estimate how much time he had left. He didn't realize he had been crying until the vision was fully distorted. He cleared the tears away and stood up from the outdoor seat.

"I am sorry, Yasaka-chan. From this point onward, I cannot accompany you any further no matter how much I wanted. You will become the benevolent ruler as you meant to be, and I… will return to the place that my parents called home," Naruto said before walking away from his home with only the clothes he had. A golden ring with fox emblems, matching another, was left at his spot.

As he navigated through the forest path toward the portal into the human world, he came across a withered old man with a long white goatee. The person was sitting on top of a boulder, waiting for something or someone. There were all manner of being in the capital so this was nothing new.

"Say, young man, can you help this poor man home?" The person requested. The fifteen year old boy stopped on his path and eyed the person again. Looking closely now, Naruto noticed he had horn-like protrusions on his forehead with a third closed eyes in between. His opened eyes were incredible unnatural due to the distinctively rotating circular rings.

"Ummm… sure, old man," Naruto replied in kind. He was not in a hurry since the sun was still at its zenith, and this elderly person's home might be along his destination. "Where do you live?"

The elderly man stroked his goatee in a relaxing manner before using the same skeletal hand to point in one direction. "On top of that small hill."

Naruto followed the man's direction as his jaw slackened. It wasn't small to him and it definitely wasn't a hill. Anyone in their right mind would realize immediately it was a very steep mountain that seemingly pierced the heaven. The tip of the monstrosity was obscured with dense ominous clouds.

"You're not kidding are you?" Naruto questioned, returning his scrutinizing gaze at the man. There wasn't a speck of dust on the man's white sage-like attire with black linings. He knew it was sage clothing since his godfather adorned almost the same style during his occasional meditation. The blond was following his godfather's footstep to become a sage, but seeing the bony posture and arched shoulder of the elder, he was having a second thought. "You're a sage, aren't you?"

"Yes, I am, have you heard of me?"

"No, but I believe you since I know sage do not lie," Naruto claimed. It was a fact, or that was what he had taught by the perverted sage. Even if he believed it, there were ways to actually lie without actually lying. For example, a sage can omit the truth or speak only a slither of truth, causing others to misinterpret them and fill in the gaps themselves. Due to that, most of the things sages said were cryptic and opened to interpretation.

"That… might be good training. I've never climbed such mountain before," Naruto said. "Fine, I will help you home, old man. Can you walk?"

"Sadly, I cannot. I've fallen off the ledge and hurt myself so it is difficult for me to move at the moment, but I want to get home in a hurry," he replied even though there was no visible injury on his person.

Naruto simply nodded before bending over in order to let the man onto his back. He'd spent years carrying a person around like some sort of mounted animal so this was nothing new. To his surprise, the old man weighted next to nothing. How he was still alive baffled the blond, but then again, there were youkai that could be blown away with a weak blast of wind.

Like a happy idiot, Naruto climbed the mountain all the way to the top with the man on his back. The ambient air became thinner with each milestone reached while the visibility dropped sharply. Soon enough, he passed through the sea of cloud and saw something shocking at the top. A monstrosity had its incredibly long body wrapped around the top like a serpent.

"What is that thing!?"

"Just some pest, will you help me get rid of it?" The elderly man asked, causing Naruto to sweat-dropped at the titanic beast. Examining it closer, Naruto concluded it was oriental dragon from what little knowledge he had. This was another thing with sage, if what they believed was the truth then they weren't lying… technically. Naruto didn't answer as he continued up the vertical climb.

Navigating around the beast's body carefully and pulling himself up onto the safe ledge, Naruto saw a small Japanese house in the center of a large zen garden. They were half destroyed, however, while the surrounding stones and boulders were crushed by powerful claws. As Naruto examined the area, the creature noticed the newcomer and gazed at the blond. There was an impassive girl in gothic attire on top of its head as it lowered. She became the center of attention of the blond due to the revealing cloth she'd adorned.

Naruto blinked several times and rubbing his eyes to make sure he wasn't seeing thing. "This day just getting weirder and weirder, I swear. Is she wearing a bandage over her tits!? What the fuck?"

"She's wearing two actually," the elderly man corrected as Naruto face palmed. It seemed like the man had seen more bizarre thing than Naruto could comprehend. He let the sage down and finally paid attention to the dragon.

"Took you long enough. Is this all the so called powerful sage of the six paths could do?" the dragon quipped while the girl remained completely unmoving while her face could not be more expressionless. "Maybe that boy there can give me a challenge, instead. Do you mind if I play around, Ophis-sama?"

She did not say a word or even changed her expression when she pointed her finger at the blond like a gun. The dragon displayed its razor sharp teeth in an effort to show its deadly grin. "To die by my hand, the great Crom Cruach, you should be thankful."

"Eh? I don't think that's how gratitude works," Naruto jested as the dragon chuckled. "And this isn't my problem. I don't know what's going between you, the weird girl and the old man, but I'm not getting in between if I can help it."

The old man gave a nod and sighed. "I supposed you're right. This isn't your problem. I will repay your generosity in the next life, Naruto Leviathan."

"Huh?" Naruto questioned how the man knew his full birth name. No body beside his deceased mother, who gave it to him in her last moment at birth, and his godfather, the self-proclaimed super pervert, knew of it. He'd never called himself a Leviathan since his heritage was supposed to be a secret. "I'm not going ask how you know my name right now, but when you say something like paying back in the next life, I just can't walk away. Damn it, I might as well help you to the end."

With that declaration, Naruto materialized his devil-like wings and entered his combat stance. The dragon was incredibly powerful from the crushed stone under its talons so he had to go all out in the beginning for any chance of victory. His demonic aura intensified, filling the surrounding.

The dragon sniffed a bit before smirking. "Hahaha? Only that much? This is going to be one side slaughter, puny devil," the dragon roared, sending forth a shockwave. Naruto remained steadfast as it washed over him. He then vanished with a blur, leaving behind a footprint etched into rock. The dragon's head was smashed from one side as it grunted. The speed displayed by the blond had stunned it while the little girl standing on its head simply watched on with a blank expression.

"You quick bastard," the dragon roared and then tried to slash the tiny opponent, but the blond vanished with his impressive speed, leaving behind a trail of afterimage.

While the creature was immensely more powerful than Naruto, its speed was nowhere his, thus it was more or less a very big target. Naruto continued to slap the dragon around with as much power as he could muster into each strike, but the damage he inflicted seemingly negligible. A bug bite would be a good analogy to what the dragon was feeling. After several more fist strikes, Naruto was blasted away with an invisible wave, emanating from the little girl. Her aura was enough to fling him away.

"Apology, Ophis-sama. I am too slow in this form, but his attack is not that strong either. It just annoying," Crom apologized humbly. "Please allow me to change to a more suitable form and I will end him in a jiffy."

"There is no need," Ophis said for the first time and pointed her finger at the blond again. "You, be mine."

"Eh? No thanks," Naruto said, hovering at some distance away after getting his bearing. He thought she meant it literally as in becoming her property. "Aren't you a little young to have sex slave, and if I accept, I don't like sharing master."

"You won't?" Ophis questioned without a hint of emotions. "If you won't join then you will die here."

"Join – ?"

Naruto didn't get to clarify what she meant before she disappeared from her spot. He quickly turned around and saw her floating behind him. His eyes widened when he realized his right arm was ripped from his shoulder. The limb was then shredded into dust with a hand gesture as the girl vanished from view again. Naruto blocked her fist strike thanked to his pure instinct, but the force behind the blow was powerful enough to shatter every bone inside his arm. "ARGH… what the hell… is this her raw strength?"

"You have lost the use of both hands," Ophis stated the obvious. She then blocked and grabbed his leg as he tried to kick her to prove a point. Before he realized what had happened, he was coughing heavily as he found himself in a massive crater inside the shattered mountain.

"I'm really sorry, old man," Naruto muttered as he felt everything inside him had been pulverized after being thrown into the ground. "I can't even see her movement, let alone try to evade her. And she isn't even using any technique yet."

As if Ophis had heard that, a glowing reddish orb formed on the tip of her index finger as she pointed skyward. She then flicked it toward the ground as the titanic dragon flew out the way in fear. The spherical destruction it created vaporized the entire mountain, leaving behind a massive hole behind.

"I think you've killed them both, Ophis-sama. I thought we were looking for strong members for the brigade?" Crom asked as Ophis landed on top of his head with indifferent.

"There is nothing left here," she said in a commanding tone of voice. The dragon nodded and left the area in search for more possible allies.

XxXxX

"…where am I?" Naruto questioned as he sat up with great effort. His body was completely bandaged as he felt the shooting sensation on his right shoulder. He lifted his right arm and had a brief glance at it before checking the functionality of his fingers. He sighed and noticed the endless void beyond opened window and doorway.

"The dimensional gap," the familiar voice answered. "More correctly, it is the pocket space within the endless void of the dimension gap."

Naruto had no clue that meant exactly. He understood there was a gap between dimensions called the dimensional gap, but a space inside the endless void that made up the place was hard to get his head around. He decided to dismiss the thought since his godfather had said weird and illogical things often.

"I guess I have you to thank for this, old man," Naruto thanked, showing his working right hand. He knew it was a replacement as it was slightly more muscular and longer than his own. He also noticed the sage's body was almost transparent. "You don't look well."

"I am fine, Naruto-kun," the elderly man assured. "I am just tired that's all."

"I see. Alright. I've been meaning to ask. How did you know my name? I don't remember we have introduced before," Naruto asked as the old man chuckled. The crackling tone in his voice was discernable.

"That is easy. I am all knowing. I am the Sage of the Six Paths, or was it that I could read your mind?" The elder man said, seemingly lost in his own train of thoughts. "It could also be a youngster named Jiraiya telling me about you. Ah, no matter. It's not important."

"Wait! It is important to me! He's still alive isn't he? Tell me if my godfather is alive," Naruto asked hastily. "Where did he go? Why didn't he say anything when he left?"

"He's alive, or is he? I'm not sure. I believed he is in all of us," the sage said tiredly, causing Naruto wanting to punch the man. The sage then leaned back against the sidewall and closed his eyes. "As to where, you will find out one day. But enough about that, you need your rest and so do I. I think I will ascend and leave this mortal plane."

"Ascend? Mortal plane? What?" Naruto questioned, but the old man was snoozing away. Naruto also felt drowsy as if he was intoxicated with sleeping drug. He blinked several times, shaking his head before falling back onto the futon and entered blissful dreamless sleep. Once he woken up and feeling refreshed, he would find himself alone in the emptied house as it floated in the void with no way out.

For the years that followed, Naruto constantly watched the emptiness beyond the drifting home of the great sage. In the first few days, he was starving as there was nothing to sustain him while his replacement arm constantly pulsed in excruciating pain as dark murderous voices invaded his mind. Luckily, he eventually figured out that the food were stored in the countless scrolls within a room that required blood activation to release them. After having his fill, he read through as many scrolls as he could find and learnt much about the world's history, mythical weapon of the ages, and the path to enlightenment. All while battling the foreign energy that invaded his being, originating from his right arm.

Near the end of his years of solitude, he finally made several lifetime friends once he mastered the power that the great sage bestowed upon him. With the new mastery, he finally was able to leave the place he called home to see what had changed in the years he'd been gone.

XxXxX

"Who is that? She's got enormous breasts! Let me grope it, let me, let me! Common, you know you want to!" the demonic voice of the right arm called out lecherously. It was one of the nines monsters within. Each had a distinctive personality and appearance. They called themselves the tail beasts that once plunged the world into darkness, but they were sealed away by the great sage. The old man had used his body as a vessel, jailing the demons within. Due to that, he was unable to enter the pure world eons after all he knew had gone.

"Pipe you down you damn perverted fox, are you even a fox even if you looked like one?" Naruto told the bandaged arm as he looked down at the inner court yard of an imperial city. A golden-haired woman was chasing a small golden-haired child around playfully while their laughter filled the air. A small smile formed on his face as a dimensional rift opened up behind him. There was nothing here for him as she had moved on with her life, and so should he.

"We're leaving? We haven't done anything besides watching that mother and child from afar. This is such a waste of time. I'm pissed. Can we at least destroy something before we go? There're so many possible targets. How about that skyscraper over there? Yes, let's blow that up. Common!"

"Stop asking me to destroy thing out of boredom," Naruto snorted. All of the demons had strange quirk and perks. It was confusing when they all talked at the same time so only one may speak at a time. "And yes, we're leaving since I have seen all I needed to see. Now, I want to check my parent's home in the underworld. It's probably not there anymore, but I still wanted to make sure."

"Boring! That's so boring! I want to blow something up damn it and kill some people! How about we hunt down the girl who took your arm? That seems more productive!"

"You mean Ophis, the Dragon God," Naruto muttered.

"Yes, yes! It has been a while since I consume a soul of a God. I've completely forgotten what they tasted like since the last warden was a complete pacifist. No wonder he was so weak in the end and got slapped around by a puny evil dragon. You don't want to follow his example do you?"

"He saved my life so don't insult him or I will shut you up and bring up someone better," Naruto said before frowning as a thought entered his mind. "And I might have a soul for you to consume along with new magic and power to assimilate. She might be challenge since she is one of the Satans, but to me, she's just a pretender."

"This better be good, or you won't hear the end of it," the demon threatened. Naruto rolled his eyes and entered the rift into the underworld. It closed as he passed through.

Down to the courtyard of the imperial palace, a golden-haired girl with golden eyes looked up at her preoccupied mother. "Mother, what are you looking at?"

"I thought your father has returns home," Yasaka said inaudibly, sniffing the air for the familiar scene that she had recently caught. Sadly, it was no longer around. "It's nothing, Kunou. Come, it's time for your study."


Author Note:

This is my version to the Serpent's Hand's challenge. The background lore is still the same, but the plotline is designed to have three different endings and a final harem ending if I'm not sure which heroines is best. I actually was going to call this The Last Leviathan, but Katerea Leviathan, his cousin, isn't dead yet.