AN: Hey, this'll be my first story here. I just had this plot bunny that wouldn't go away, and the result is something crazy

Contains minor spoilers for Fairy Tail. Features powerful Issei, dragon Issei, non-sacred-gear Issei, and less perverted Issei. Issei x Tiamat x small harem.

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Chapter 1: There's a Whole Other World Out There

Supernaturally aware humans had it rough in Kuoh, or anywhere for that matter. Even the cleverest and strongest of humans without a sacred gear or other weapon were barely a match for a low class stray devil. They get a sinking feeling that no matter how much discipline and focus they put towards their training, they still wont be able to live in peace. And since they're aware of the supernatural, they usually wont be ignored. Yeah, just knowing that there was a whole other world hidden beneath your own was a risk.

Such was the case of the Hyoudou family. They were a simple, middle class, three person household with a son, Issei; a mother, Honoka; and a father, Takeshi. Issei was a quick witted kid with thick, contantly messed up brown hair and curious brown eyes to match, and he had a penchant for sticking his nose where it didn't belong. Most kids did. His father had short, messy black hair and wore thick glasses, giving him a buisnessman-like appearance. Though he had a small frame, he wasn't weak by any means. And finally, Honoka, a woman of average height, had smooth brown hair down to her neck. Her bangs in the front were cut short, giving her a minorly tomboyish face. While Takeshi worked in an office, she mostly stayed at home to guard the house and watch Issei.

The only thing that was unusual was that both of the parents knew magic. It was almost entirely a result of learning of the supernatural and searching for a way to combat it. See, before Issei was born, the married couple stumbled upon something they really weren't supposed to see and they were never the same ever since. Both discovered that they possessed some aptitude for magic and were therefore a 'special' type of human called a magician. Technically, they were 'stray magicians,' because they didn't want to affiliate themselves with any group, but they weren't powerful. Joining an official magician group would only drag them further into the world that they wanted to esacpe from. Sure, they had some rudimentary knowledge of the art, more than almost everyone else, though it wasn't like they could old a candle to the immense power of legends like Merlin.

So, yeah, in order to get the power they needed, they did something really stupid. Incredibly stupid. The reason they did something so drastic stemmed from the frightening events of the week prior. Issei was only five years old at the time and already a stray devil had wandered through their areas and killed some of their neighbors. Obviously, they tried to stop it, yet the best they could do was hold it off until a devil arrived to kill it. They were powerless to defeat the monster, a problem they prayed they wouldn't have in the future. Now, here they were, pouring over a musty arcane tome that they pilfered from the church.

Kind of a ballsy move, considering the church was run by fallen angels, who, unlike their counterparts in heaven, have no qualms with killing humans for a simple unused book. Still, the information on teleportation spells was so dearly worth it. They'd be able to avoid anything that came after them to keep Issei safe.

"Takeshi!" Issei's mother yelled. "They're coming already! Did you figure anything out yet?" While her husband tried to decipher the text and learn the one spell they'd need for the rest of their life, she was sensing for threats. Issei peacefully slept in his room.

"Hold on, I've almost got it," he replied. "Wake Issei, we've gotta go, now."

"Honey, you better know what the hell you're doing." She didn't doubt him for a second though, since he was much better at space-time magic than her.

He didn't bother to reply, flipping the page in the book and gazing intently at a diagram. 'Maybe there is a way to escape this after all,' he thought quietly. He hummed to himself and adjusted his glasses as he studied the tome, transfixed by the promise one of the spells offered. 'No wonder the fallen really want this back. This could provide nearly endless opportunities.'

"Mom, wha's goin on," Issei slurred tiredly as the two descended the steps from his bedroom. It was past midnight, and the poor kid could barely stand.

"There are some bad people after us, buy Mommy and Daddy will take care of it. Right, honey?" By the time she finished, they were standing right next to Takeshi who was sitting cross-legged on the floor.

"Yeah," he answered, still focused. "Change in plans, we're going to use this." He held the tome up with a hand and showed it to his wife.

Her eyes widened. "You can't use this! What if we end up somewhere hostile? What if we don't have enough magic power and it kills us?" She said the last part quietly, as if she had accepted that this was a better idea but still feared the inevitable risks.

"Think of it. We could give Issei a safe life, free of everything in this world. Maybe he could make something of himself. I have no plans of involving you in this spell; I'll do it myself. Teleporting around will only delay the inevitable. But this," he looked up, "this is a chance at a new beginning."

Issei was confused, but he had never seen his father so determined before in his life. He knew his father was much quieter and more selective with words than his mother, though the man rarely even outright denied her. Then again, Issei wasn't able to understand anything going on at the time, only that his father was incredibly serious for whatever reason.

Without any further words, Takeshi took a piece of chalk, stood up, and began drawing a symbol on the floor. As the white substance rubbed off onto the wood, it emitted an both a painful screech and a violet glow. By the time he was finished inscribing the symbol, it was a meter wide pentagram humming with energy. "Honoka, Issei. Get in the circle." There was a knock at the door. "Shit," he cursed.

Honoka nodded to him, many words being conveyed in a glance. "I'll hold them off. You just worry about Issei. I need to know he's safe." With that, she nudged the young boy into the circle. "I need you to stay here, okay. You can do that for me, right Issei-kun?" The boy nodded, bewildered. "I'm counting on you, honey!" She faced the door and held out both hands, an odd blue light pouring from them and reinforcing a barrier around the house.

This time the knock was a slam, and the door nearly bounced off its hinges with a loud thud. "Even at the cost of my life, I will see you safe... I hope this works," Takeshi mumbled to himself. He tossed the book into the circle with his son and began to chant in Latin.

Issei gasped as the chalk outline began to glow. As that was happening, however, the light was fading from his father's eyes, and he was beginning to slump forward, unable to muster the energy to keep himself upright. Takeshi's hair grew grey, and his face lost its youthful definition, as if he aged twenty years in an instant.

"I love you Issei," Honoka said, as her son's body began to glow the same white as the symbol.

"Me too," her husband added, the chant over, the energy fading.

"Mom? Dad? Wait! Don't go! Please!" Issei cried, now able to see through his hand. His father fell on his face just as the door burst open and a man with black wings entered the room.

"You'll never find him, or that book," Honoka growled.

The man was enraged by the proceedings, a wide-brimmed hat shadowing his features. "What did you do?!"

Issei's screams of protest were fading out, as if someone had turned the volume down. And along with the sound his body and the book seem ghostly translucent. Then, blinding light emerged from the pentagram, and a sound equivalent of a thunder clap echoed through the room. When it all calmed down, Issei and the spell tome were both gone.

"Dimensional travel..." Takeshi mumbled feebly, a victorious final smirk on his average features. He looked up towards the man, his body hardly able to support the gesture, and gloated, "You lose, fallen angel."

With that, Issei found himself in whole new world entirely.

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Fiore x773

Zonia mountain was one of the most remote and peaceful locations in all of Fiore. Standing hundreds of miles away from the nearest town, nestled in the northwestern part of the country, the tall mountain was the epicenter of an eternal cold. Whether caused by magic or a simple climate anomaly, no one ever bothered to find out, but some did believe in a supernatural connection. Mysterious, wispy clouds consistently obscured the peak, inspiring rumors and superstitions among the locals. Local, as in only twenty miles away where there was a small settlement.

Very few people claimed to have travelled to the peak, and, as such, it was the perfect place for someone who didn't want to be found. That is, if they could endure the year long cold spell and occasional snow showers. It wasn't that huge compared to some of the mountains east of Fiore, so it wasn't attractive to thrill seeking mountain climbers. Besides, no one wanted to brave the awful weather.

That was why Acnologia chose it as his refuge. Peace and quiet, free from some of his least favorite creatures in the world: humans. He hated weakness, it was something that he never understood. As an enormous black dragon that could claim to be one of the three most powerful beings in Fiore, if not Earthland, he couldn't comprehend that no one else could attain the same strength as he did. Here, though, he wasn't bothered by anything and could exist in solitude with the only being he cared for, himself.

In all honesty, he was human too, once upon a time. 400 years ago, there was a war between dragons and the humans they subjugated. One dragon had spoken out against their mistreatment of humans and as such sparked a rebellion throughout the entire world, but it had little chance of winning. Until a young black dragon decided to take in a white-haired orphan and train him in dragon magic, making him the first dragon slayer. But that was long ago in another time and another life. Acnologia had long since overcome his weakness.

It was there, curled at the top of the mountain, that the dragon noticed a foreign energy signature. He cracked open a beady, pearly white eye and raised his rounded snout. Something was close, seeking his energy, even drawing on it for some type of magic he could hardly fathom. Unwittingly letting out an annoyed growl, he pressed his paws against the frozen rock and hauled his massive form onto all fours.

The dragon, now awake and standing in all of his glory, was a sight to behold. His 40 meter long body was covered with midnight black, round scales extending from his head to the tip of his tail, each linking together into an impenetrable armor. Two great feathered black wings, like those of a massive bird, extended nearly 25 meters on each side, clearly capable of supporting his weight. His underbelly was a dull grey, contrasting with vibrant, exotic blue patterns overlaying the black scales and wings. His head was rounded, his snout blunt, and four backwards-facing scaled plates gave it a fierce visage. One look at the dragon would inspire dread in the most dauntless of hearts, not to mention seeing mouth full of sharp teeth.

But for just a moment, this enormous dragon had doubts, that unfamiliar magic tugging at his own lifeforce and drawling power for God knows what. He huffed, almost laughing at how weak the spell was, considering that the large amount of energy stolen was but a drop in his reservoir. Then, as suddenly as it came, it stop. With a groan, he rested his body black on the ground and closed his eyes. Nothing could harm him, anyways, he knew.

Still, he was absolutely not prepared for what came next. "Mom! Dad!" A shrill, high pitched voice wailed from behind him.

He whipped his head around and came face to face with a young, brown-haired child, maybe five years old. For a moment, he wasn't sure the kid noticed him; then the boy's eyes widened. He was sure the human was about to scream, terrified of the giant beast.

"What did you do to them!" Huh? Did he hear the kid right? Instead of fleeing and yelling, the miniature human accused him straight to his face?

In all honesty, Acnologia was nearly at a loss for words. "I did nothing to your parents." Something was unexplainable about this boy, as if he had immense power hidden within his feeble form. It was an odd feeling, one that the former slayer dismissed quickly. He had been alive for too long to have something surprise him.

Wait, speaking of surprise, how did this kid get here, and what did it have to do with that strange magic? It was a confusing situation. There was definitely no way that anyone with the puny magic he had in his system could brave the climb to get to the top. He decided that it was best to voice his question, as horrid as the thought of engaging in conversation with a child was. "What brought you here, weakling?"

"My name's Issei!" He shot back immediately.

Acnologia growled threateningly. "Answer before I lose my patience."

Issei's eyes went wide, but he refused to back down. "Mom woke me up and said there was bad peoples after us so I went downstairs and Dad was doing weird things with a book and some white stuff making symbols on the floor then someone came in the house and Dad said something funny then he fell over and I was here and it's cold!" The boy paused for breath, the dragon barely understanding the rushed sentence. "What did you do to him!?"

"Idiot," Acnologia huffed, irritated. "You say your father used a book as a reference to draw a symbol?" The boy defiantly refused to answer. It didn't matter if he did, seeing as how the kid was probably too young to understand the situation. If Acnologia's suspicion was correct, then it was likely the father either tried to either summon the black dragon himself or draw on his magic to take care of an intruder (as crazy as it sounded). Either that or the human created a teleportation circle, one that he obviously didn't have the magical ability to activate successfully. It was then that the dragon spotted an open book resting on the ground near the kid.

Acnologia brought his snout uncomfortably close to the brunette, almost bumping him as he read the text on the open page. 'Much of it is in a cryptic language unknown to even me,' he mused. It was certainly an anomaly considering that he knew most 'ancient' languages after living upwards of 400 years. There are words he recognized, however. Specifically two: 'Dimensional Travel.' That was a shock. Issei's father had the capability to travel dimensions? Unheard of. Well, it did apparently cost the man his life, so it was not without a price, but such a magic was nearly impossible. It was not even considered as a viable side project of the best minds and strongest mages.

"What did you do?" Issei repeated, this time as a dangerously quiet mutter, tears forming in his eyes as he glared at Acnologia's white eye.

"Nothing. Your pathetic father used magic to send you to a different dimension." He huffed, continuing, "he was weak enough that it cost him his own life and thus required a measly amount my magic to complete the spell."

"Dad isn't dead!" The boy cried out, the tears now rolling down his face. "You liar!" Whether or not the kid had a hidden power, he was ballsy; the black dragon had to at least give him that.

Acnologia sighed. This was just one of the many reasons that he couldn't stand humans. "I have no reason to lie."

The boy fell back, landing on the rocky mountaintop, but he could care less about the pain. In fact, it was kind of welcome. He couldn't continue to deny it any more...the dragon, intimidating as it was, told no lies and affirmed his fears. His father once enlightened him on what death was; it meant that he'd never see the person again. Ever. But he wanted to see his dad, he wanted to go back home. Why did his father have to leave him? He gazed at the ground, more sinister thoughts flashing through his mind.

Acnologia was just about to turn around and go back to sleep to ignore this kid when the boy mumbled something. "You say Dad died because he was weak?"

The dragon grunted. At least this human understood something about life. "Just like you, brat."

"I don't wanna die!" He yelled, not in fear, but in determination. "I'll show you, you ugly dragon."

Whatever it was, something clicked right then for the immense dragon. An orphaned child, left alone to fend for himself. A young boy, weak and frail but with an insatiable hunger for power. Someone who found a dragon, as if by luck or fate. Though he would never acknowledge the connections, his subconscious easily connected the dots. The only thing that was different was that Issei was from another dimension entirely, a concept that Acnologia had trouble coming to terms with. If he were to raise anyone as his dragon slayer, it had to be someone special, unique, and a human foreign to this world certainly fit the criteria.

The possibility of someone almost as destructive as himself? That made the dragon almost giddy with sick, sinister anitcipation. "I am the Dragon King, Acnologia. You desire power, power that humans should never be able to attain? I can give you that." The boy looked hopeful.

"Yes," Acnologia grinned internally at the potential, "you will be my dragonslayer and my son."

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AN: Thanks for reading and don't forget to drop a review!