A/N: Yo, everyone. Here's my new story, for which idea just came to me one day when I was writing my other fanfiction. From where I actually took my OC, just made OP you'll see in right at the start. (To every OC hater, don't worry, he's not playing any big role here, he's just like that NPC in starting town that sends your character on his adventure.) So, I thought "There are tons of stories where Issei starts with some other great powers, gets Boosted Gear earlier, and on and on, some with time travel. But I haven't seen one with him actually taking part in the Great War." And here it is. Now, let's got to the reading.

"Boring. Boring. Boring. Bo- wait, that's actually interesting. But still, it's boring just sitting here!"

In a room without walls, surrounded by countless screens sat man clad in black kimono with a hood hiding his face.

"All this power I got from you, only to end up locked in here watching this part of the multiverse without any way to use it!" The man raised his head, throwing his hood off. He looked to be in his late twenties with cat-like orange eyes, black hair and white bangs.

"Oi, I'm talking here! Maybe answer me!"

What do you want? I'm trying to build a narration here.

"And I'm bored to the point of insanity. I'm not doing anything else than watching all parallel universes filled with Isseis, forbidden to do anything and effectively banished in here. On top of that, in this infinite number of worlds, there is only one Septimus. Only one other version of me! Sole variation from this endless torment is when I can drag Kaleidoscope or some other multiverse travelers here on a drink and talk."

Why have I created you to be like this? Look, I gave you what you wanted, unmatched power and absolute knowledge of the world. But, I can't just let you run around with them, doing whatever you want. So, again. What exactly do you want from me?

"I want to do something in one of the worlds. Not even by myself. I want to play You a little, stir things up, change a bit of this and that, and watch from here what it will become. But this time this will be my doing, at least partly."

If that will stop you from breaking the fourth wall here, why not. Just be quick with it.

"Aye aye, sir. And only one little request."

What?

"Can you add another version of me in the world we're going? You know, three's company and all."

Alright, but I'm not showing him. Now move before I change my mind and erase you from existence. And let me make normal narration again.

"Let's go!" The man shouted excitedly and jumped off his chair like someone freed from torture device. Summoning mass of energy to his hand, with a loud crack he created a ripple in space and not waiting anymore he jumped into this.

Oh, I finally remember why he's like that. I was just too lazy to think about how to create a convincing reason for what I wanted to occur, so I made him do my dirty work...

Happens.

Issei Hyoudou was dying, there was not much else to say. At the end of their first date his girlfriend Yuuma Amano, or Raynare as she's just introduced herself, transformed from an attractive schoolgirl into a more mature version of herself in black leather S&M costume. And everything would be great, if not for the fact that after that she grew a pair of black wings and in her hand appeared some glowing spear, that she threw at him. What ended with him laying in the growing pool of his own blood with minutes, if not seconds of his life. At least he saw some boobs moments before he died.

CRACK

"Ohh, finally. Polluted air of this world, how I've missed you." Issei heard some weird noise like something breaking or being torn apart, immediately followed by a merry male voice. "Now, to do the job here. You, BDSM Vulture. Get lost before I become curious how burned Fallen Angel smells."

From where Raynare was sound of frantically flapping wings came to him, quickly weakening away. "Now, without her here, state your wish. C'mon, you're dying right now, hurry up. What's the dying man's last desire?" Without any noise hooded person appeared above him, flame-like eyes focused on him.

Feeling darkness overcoming his mind Issei forced himself to formulate one more thought. "What is my desire? If I have to die, I want it to happen in arms of the beautiful girl, looking in her eyes, not in those fiery orbs."

DxD

Invisible Septimus watched as before him, over dying teen's body, crimson teleportation circle appeared. Out of it came out a girl with just as crimson hair and breasts that behavior escaped any logical comprehension and laws of physics, Rias Gremory. Not noticing the other individual a Devil looked down on her summoner.

"So you're the one that summoned me?" She asks and looks carefully. "Ara, ara, there's something interesting in you. As you're already dying I can pick you up to be my servant."

Patiently waiting, the black man observed as Devil princess tried different pieces. When finally after few minutes red light shone from eight Pawns as they sunk into Issei's body, Septimus dispersed his invisibility and revealed himself.

"I'm sorry, but that won't be possible. This one's going to be my source of amusement and I can't let you have him, Rias Gremory."

CRACK

With a wave of his hand under Issei crackling black rift, that swallowed newly reincarnated Devil. Seeing this Princess of Destruction summoned her signature power with intent to question this strange individual and get back her Pawn. However, as she looked into his burning eyes, she froze, seeing in them something similar to what she in her brother when he has let out a glimpse of his true strength. Incomprehensible and unthinkable power.

"Before I forget. Thanks for the help, it's way easier to use actual Gremory pieces than to fake them. Here, these ones will replace pieces you've just used." Before redhead materialized eight pawns just like her previous set. When he was about to step where Issei vanished, a particularly playful spark flashed through his eyes. With a toothy grin that made Rias want to abandon her pride and run away, he created small card alongside pieces. "Here, contact data to one Nekomata highly skilled in magic. You should be able to recruit him with little convincing."

Only after the split in reality closed behind its creator Rias remembered that her body needed to breathe. Faster than ever before she summoned teleportation circle leading to her club and from there she contacted her brother. The following days were especially heated for Underworld and unfortunate teen that had his home raided by an army of certain siscon Maou.

DxD

Immediately after coming out of his portal Septimus picked unconscious brunet and looked around. They were in an empty warehouse, weak moonlight shining over naked metal walls.

"Perfect." In a blink of an eye before him appeared simple surgical table. After setting Issei on the table, Septimus took off his hood wide-smiled and created a glass of liquor for himself. "I forgot how much fun it is to play those mysterious and scary characters. Although I most likely screwed up at the end. Welp, not like I care, I have what I wanted and even made some mess aside. Now, to our main character."

Leaning over the senseless figure, the black-haired man looked over him while rubbing his chin. "I'll have to modify his Evil Pieces a little for him to promote without King. Besides that, memory purge and some changes in his Sacred Gear. Easy. Then, time travel, drop the poor guy and create a stage for his debut in the new world. Or is it the old world?" He muttered under his breath. Downing drink in one gulp he threw the glass away. "Whatever. Time to work."

DxD

Somewhere over Europe, the sun was setting down, painting the forest there in a variety of shades of orange, emphasizing Auburn's picture. At the edge of the forest, laying on the blanket of fallen leaves, the lone brown-haired teen was sleeping. Some rays found their way under his eyelids, slowly waking him up.

"Ugh." Issei wheezed as he sat, stretching stiffness from his muscles. Looking around, the teen noted that there was no other living this around, abnormal silence with no sound of animals or even wind moving the trees. The kind of unnatural pause and peace that world takes right before a massive earthquake or volcano eruption happens. "Where am I...?"

BOOM

The tranquility abruptly came to an end, when from somewhere deep in the forest large explosion echoed, followed by a strong gust of winds. His train of thoughts interrupted, Issei turned towards the source of the noise. Feeling as if something in his mind pushed him towards there, the teen walked between the trees. With every step he took the feeling was becoming stronger and soon he was running there, avoiding low hanging branches and stuck out roots. After few minutes he began hearing clashing sounds, accompanied by shouts. When shortly after he heard a loud cry of pain, Issei was able to see flashes of light between the trees.

As he reached large clearing before him peculiar scene appeared. In the crater taking over half of the glade were three individuals in brown leather armors. Two had black hair and third one blue, with wings in varying in intensity of black. All of them pointed spear-like objects that looked as if made of light and gave Issei threatening sensation at the lone young man with blood red hair. The one at the front, that Issei assumed to be their leader, had three pairs of wings and gray spear. Other two standing at his sides had only one pair each, their spears brown and red respectively. As for the redhead, he looked to be Issei's age, wearing expensive-looking battle garments colored in red and gold. Standing there, he was holding his bleeding side, eyeing trio before him.

"Look here boys, that's all those filthy High-class Devils are worth. With their big armies and servants they think they're invincible, but separate one and he's easy prey." The leader of winged men laughed as he swayed his weapon before him and spat towards the Devil.

"Said Fallen Angel that needs two of his comrades to fight a previously injured enemy. For sure such a great feat will make your names known through all Factions as fearful opponents." Injured Devil taunted his opponents, but it was clear that he was at disadvantage there.

"Shut up, scum! We'll take your head here and present it to our leader while rest of you will rot here. I'm curious how your family will react when they'll see your pretty red head hanging over our armies." The one on the left shouted with a vicious sneer as he observed Devil's reaction on his word.

Watching the scene moved something inside Issei. He felt as if he saw something like that before, or more accurately was on receiving the end of a similar situation. He felt sorry for surrounded teen, but aura emitted by three men and their weapons told him, that if he moved against them he'd die. Then, the teenager felt time around him stop, with falling leafs stopping midair and only shadows moving. As shades danced around the forest in last light of setting sun, Issei felt as if they were reaching for him. When black tendrils reached him Issei thought for a moment that there was a black and white cat on his shoulder, but when he looked there he saw nothing.

"You want to go there and help him, don't you? But you can't do nothing, you don't have power." A playful voice spoke in his mind. Issei immediately turned around, but he only caught glimpse of white in shadows. "Or do you? What if you had power? What if maybe I could give you power?" Issei felt that whoever the voice belonged was circling him. When he turned back where he was primarily looking, two orange eyes appeared before him, followed by the rest of the cat with numerous tails that sat on the nearby bough. "What then, boy?"

Dumbstruck Issei gawked at talking cat before him. Matching his stare, weird animal tilted its head, clearly waiting for an answer. Thinking for a moment, Issei darted his eyes towards the group in the crater. Looking back at the cat, Issei answered with conviction. "I'd help this red guy."

Swaying his tails, the cat jumped off the tree and disappeared. Again in Issei's mind sounded it's voice, laughing from the shadows around him. "Good enough for now, but what after that? Don't tell me. I'll give you your power. But I have two conditions. One, tell no one about me. Two, from now on, you'll have to be... Kind and respectful to every cat you'll come across. How about that?"

Certainly not expecting this kind request, Issei needed a second to collect his thoughts. "...Ummm, alright?"

After his response, the cat materialized again on his shoulder and nuzzled against his cheek. "Splendid." It purred. "Now, imagine someone or something that you see as the most powerful in the world. When you have a clear image in your mind, focus on what you feel and try to channel it through your body."

Issei closed his eyes and thought about what weird cat told him. In his mind appeared glowing man with spiky gold hair, but surprisingly Issei couldn't tell anything about him, not even his name. However, before he could think more about it, growing sensation in left arm got his attention. After a few seconds, in flash of green light, red gauntlet with green jewel and two gold spikes appeared on his arm.

The cat looked incredibly satisfied with his actions. Purring louder, it moved closer the gauntlet and wrapped its tails around it. "Well done. Behold the 'Boosted Gear'. It allows you to double your power every ten seconds. But, it looks like it's still incomplete." From between his tails shone white light. When he unwrapped them, gauntlet guarded bigger part of his arm, grew another few spikes and looked more like Dragon's arm. "There. That color scheme is not exactly my thing, but I'm not the one wearing it. Now, every time it shouts [Boost] that means your power doubles and with [Explosion] all stored power is released for a few minutes. If you want to hide it, just think of it disappearing. There are some other abilities, but I'll let you find them yourself."

After this, the black and white cat jumped off his arm, leaving Issei to himself as he admired Sacred Gear. When he turned to thank for whatever talking animal done to him, there was no trace of him and next moment time resumed its natural flow.

[Boost!]

From inside of Boosted Gear came cat's voice, announcing first power up. Looking back at three Fallen, Issei saw them preparing to kill redhead Devil. Even with his power doubled, he knew that nothing really changed and he needed at least two more boosts, maybe three. But he didn't think that those three would just wait nicely for him. Weighing his option, teenager thought about only one way he could win there.

[Boost!]

When the second boost sounded, Issei came out from between the trees and threw a stone at the trio. "Oi, assholes! Three against one is kinda unfair, care if I join him?!" He shouted at them with fake confidence, hoping to buy himself enough time.

"Who the fuck are you?" Everyone in the crater turned toward him, with blue-haired Fallen Angel, who looked incredibly bored, finally speaking up. Their leader quickly glanced at the newcomer, then turned to his associates. "Doesn't matter, he's a weakling. Kill him, and we'll take care of this one here."

When the trio turned their attention from him for a moment, Devil summoned orbs of magic energy in his hands. With pain written over his face, he threw them at spears that were flying at him, red power eagerly eating both weapons.

Meanwhile, now standing on the verge of the crater, Issei looked at his opponent. The older man just sneered and raised his spear at him. "I don't know who you are, but war is war. Devils, Angels, and Fallen Angels kill each other, and you're just another weak Devil."

As he threw it at him, Issei again got a flashback of the same situation. This time, however, instead of standing there and letting himself be speared, he moved off its way. Counting in his mind all this time, teen knew that he needed two more precious seconds before he could release the power.

Seeing as his first attack missed, Fallen Angel spat with distaste and summoned two more. Trying to avoid them, Issei jumped away, but when he landed ground beneath him gave up. Unfortunate brunet skidded down the slope, right under the feet of armored man, looking straight in his red eyes.

"Any last words?" He asked as he pointed another spear at him.

[Boost!]

When the third boost activated, Issei grinned. "Yeah. [Explosion!]"

With his shout Boosted Gear shone with bright green light, momentarily blinding other man and flooding his body with energy. Sensing new source of power other combatants stopped their fight for a moment, staring at other Devil. Issei, using brief blindness of his enemy, kicked him under his left knee. Rolling from under falling Fallen, the teenager shot up on his legs and turned to the redhead. "Don't just stand there!"

Shaking out of his surprise, just like his unexpected ally, young Devil used his enemies' daze and threw a ball of demonic energy at weaker of his enemies, killing him before he could react.

"Arg-!" Victim of Devil's orb tried to scream, but his vocal cords were quickly disintegrated with the rest of his body.

"Bastard!" Death of one of his underling enraged six-winged Fallen Angel. Focusing back on the foe before him, attacker's leader clenched his weapon and rushed at the killer.

"Ugh..." Low grunt next to him brought back Issei to his fight. Rubbing his eyes of remaining blindness, Fallen raised up, slightly stumbling on left leg. "You have balls kid. That bighead with three pairs of wings ordered us to go against weakened Devil without giving him a fair chance to defend himself. Stupid coward. Even at war, one should show his opponent respect and face his in an honest fight." Summoning red spear, winged fighter hid his wings and raised weapon before him in standard spearman position. "Let's fight fair and square, just Devil and Fallen Angel."

Issei noticed that for the second time he was called a Devil, but there was no time to think about it now. Raising his fists, he rushed at his opponent. When he came into spear's range, it came at him with lightning speed. Instinctively blocking it with his red gauntlet, teenager answered with his right fist flying at man's head. Swiftly sidestepping, Fallen twirled his spear around and sent another jab that was again blocked in a clash of red.

Trading blows for about a minute, Issei noticed that his enemy was protecting his left side, with his left leg moving more stiffly than the right one. Not sure how long this boost from the gauntlet would work, he decided to focus on man's injured leg. His idea seemingly worked, as Fallen Angel started to back out and focus more on the defensive. Wanting to end this quickly and go help with the last one, Issei closed up and sent a powerful kick at his left leg.

But that was exactly what spearman was waiting for. With faked stiffness gone, the man spun out of kick's way. And just like a viper when careless prey came too close, spear rushed at the overextended leg, piercing it and pinning to the ground.

"Argh!" Issei scream in pain, feeling as if white-hot rod skewered his leg and molten metal coursed through his veins around it.

"You fight well, with your whole heart. But, you're green and have fallen for a simple trick with a fake opening." Soldier of Fallen Angels praised him and took out his spear, making Issei fall on the ground clutching big hole in his leg. At the same time sound of the battle behind them silenced. Turning his head around, Fallen saw some of his superior's feathers raining around, with redhead Devil panting among them. "So, Narael lost. Figures." He stated with a bored sigh.

"And you'll soon join him." Said Devil tiredly, slowly closing in on them with one hand on his wound and other holding swirling mass of energy.

Seeing as the tables turned, Fallen Angel sighed and brought his spear at Issei's throat. "Most likely. But before that, I'm sure to take this kid with me and maybe even I'll get lucky and score a hit at you. So how about a deal? You'll let me go and I'll spare this one who risked his life for you."

Staring at each other for a moment, with Issei on the ground shooting his eyes between the two of them, Devil finally dispersed ball in his hand. "Alright, let him go and leave."

Hearing this, Fallen nodded and also dismissed of his weapon. Spreading his wings he flew to the edge of the crater and turned around. "Oi, kid! What's your name?"

Still holding his leg, called teen sit up as pain in his leg dulled slightly. "Issei."

"Setanta. Train up, kid, then find me again at the battlefield. I'll be waiting for our rematch." Fallen introduced himself and flew away.

"So... Issei, right?" Redhead Devil walked up to him and held up his hand. "I'm Sirzechs Gremory. Thank you for saving me. Without your help, I'd sure be dead by now."

Grabbing other teen's hand and with his help standing up, Issei smiled. "It's nothing. I just saw that you needed help and distracted them a little. You did most of the job yourself."

"Still thanks. You said your name is Issei, what clan you're from?"

"Clan?" Issei repeated after him not understanding what he was talking about.

"Your Devil clan. I'm asking where are you from. Besides, what are those clothes and why there's a hole in them?"

Again with calling him a Devil. But when Issei though about the second part, he suddenly found a void. Finally having time to think, he realized that outside of his name he doesn't know anything about himself and the situation he was in. And it was actually true, in his clothes, over his stomach was a big hole. Trying some more to remember something, Issei finally responded. "I don't-"

[Reset!]

Right then, Boosted Gear spoke again. Suddenly feeling his strength leaving him, replaced with a wave of fatigue. He'd fall face first into the dirt, in not for Sirzechs catching him right before he hit it and carefully helping him sit.

"I don't know. I've just realized that I don't remember anything besides my name. I don't even know where I am or how I got here. Hell, I didn't even know I was a Devil." When he was safely back on the floor he answered honestly.

Looking at him thoroughly for some time Gremory sat beside him still holding his side. He summoned red magic circle that flew in the sky and turned back to Issei. "This will inform my family where I am and they'll send someone here to help us. In the meantime, as you don't know anything, let me explain everything to you. You see, we Devil are at war. Great War against God of the Bible with his Angels and Grigori leading Fallen Angels. Three Faction..."

And that was one teenager explained other the world he was now in, as they waited for the help among raising darkness of the night.

Back in the wall-less room sat familiar black and white feline. In the next second in his place was also familiar man in black kimono holding a glass and looking at the screen.

"And so it begins." He announced, raising his glass in the air.

A/N: And so it ends. The first chapter I mean. What do you think? In my defense of removing Ddraig's voice from BG, he's still alive and his future version stayed in the future, so someone had to fill his place. Besides that, I'm waiting for your opinions and thoughts about the story, what do you want to see in it. As it's DxD, there will be a harem, and I'm open for propositions, but make it logical. So, none of the canon girl, just those who could participate in Great War. I have few candidates, Grayfia and Serafall on top of them.

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