This is one of the two ideas I had floating around in my head for another HDxD fic, I'll probably publish them both to be honest. It's going to be centered on Issei, but starts off with his wacky heritage.

Not going to reveal too much, just gonna jump right into it. Read and review as always, I like getting better. Let's go!

Chapter 1: The Union That Would Shake Reality

It was a… rather dark day. Then again, the dimensional gap is always dark, so there wsn't much difference. It just so happened that two nigh-omnipotent beings were taking residence here as well. They weren't exactly on friendly terms to say the least.

"I told you, I'm not trying to steal your home, infinite one! I was just passing through on my way to a rift with a strong oneiric (dream-filled) aura!" A very large, red dragon, probably around 100 meters in size from snout to the tip of the tail, was fleeing from a barrage of attacks that didn't even have definitive colors.

"You aren't tricking me, Great Red! You came here to steal my silence, you crimson bastard! I, Ophis, will not stand for this!" A sight that was completely out of place in a gloomy location such as this, a little girl with sweeping black hair wearing a gothic Lolita outfit, was the one administering the attacks. If anyone else could survive in this twisted visage of a space, it'd look akin to a scene where a man's girlfriend was viciously chasing him down after he had done something lecherous, though the parties involved are more than a little different compared to their stereotypical counterparts in this situation.

"Geez, fine! If you won't believe me, I'll just have to use force!" The now named Great Red decided to fight back, though he wasn't exactly excited about having to subdue a female. Hell, he wasn't even sure why he was a "he" at the moment, it just felt like the right gender to take on for the situation. Something was going to happen that required him to be a male, though he(it) wasn't sure what it was. For that matter, Ophis wasn't sure why it was a girl either. It had never bothered with genders, seeing as how there wasn't even a being that could converse with it regularly until Great Red showed up, so there was no need to pick a side or do anything. Why was she so angry too? Normally, emotion wouldn't even register in her, but this creature got her hot and flustered for some reason.

Conjuring up a fireball many times larger than Ophis, Great Red sent it at her with alarming speed. Ophis stood her ground, and raised her aura, conjuring up a cyclone-like gust of wind (she created it, as the fabric of reality in the Dimensional Gap is too unstable to support elements or anything definitive) that pushed the ball of inferno into parts unknown. Smirking, she waved her hand and created a mass of black flames, wielding it like a sword. She had taken on the form of a black dragon with red eyes, equally as large as Great Red on every account.

"These are the flames of a lesser deity from a place called "earth", I think her name was Amaterasu or something like that. They're hot enough to make even me take notice, so I'm sure they'll do the job. Suck it, you red asshole!" She closed in on Great Red and thrusted the sword in a rapid fashion, intending to make swiss-cheese out of her opponent.

"This bitch", Great Red had thought. Summoning a shield with intricate designs on it, he held it up at every point that the sword looked to penetrate his defenses. No matter the amount of effort she put in, Ophis could not break the shield, much to her growing chagrin. Stopping her onslaught, she yelled out a question.

"Ugh, what the hell is that shield!?"

"One of the 'treasures' of a place called Japan I think, the yata mirror. Said to be able to reflect any attack." With a wide, toothy grin, Great Red finished his explanation. Ophis' aura started to flare even more, causing the already unstable space they were in to deteriorate into a black void.

"This is bad, if she keeps getting pissed, this place will fall apart and I'll have to jump into the nearest riff until it repairs itself… that could take forever!" Thinking of a way to stop the Infinite Dragon God (as she proclaimed herself), he remembered where she had said that she got those flames she used. "Wait, earth!? That's it!"

Taking out a souvenir he had gotten from the dream-filled place on his last visit, he waved it in front of Ophis' face. The effect was immediate and tangible, as the Dragon God calmed her aura down and eyed the object with increased attention to detail. Deciding to speak up, she narrowed her eyes.

"Where… did you get that?"

"You know already", was Great Red's response. "I got this little trinket here from that dimension that houses the place called earth." Upon hearing this shocking revelation, Ophis expression became ecstatic. Oh yes, it had been so long since she had seen this wondrous orb called Takoyaki!

"… GIMME!" Like a child pouncing on her Christmas presents, Ophis made her way across the gap (no pun intended) between them and tried to snatch the snack from the other dragon. She failed.

"On one condition." Great Red had planned this all through, he wouldn't simply let it be snatched away from him because she was impatient.

"You are to NEVER, for as long as we immortal beings live, chase me around again. My athletic points are at 1, I'm a lazy dragon who's not suited for all this running, ya know?" Apparently, this monster of a dragon was what one would call an Otaku, which seems to be why he visited Japan so much. If he could make anything else immortal like himself (well he can, but only living beings), it would be the concepts of "manga" and "anime".

"… Deal." Ophis couldn't refuse sweets or anything she deemed delicious, so she hadn't much of a choice in the matter.

"Well, if you'll excuse me then, I'll be on my way to earth. Have a nice day, er, night… whatever." With that, Great Red took his leave for the now shrinking rift to earth. Ophis, not one to emote normally, felt she had to show this nice guy the thing called "gratitude" that everyone on earth showed when they were thankful for something, like having someone to help get a kitty down from a tree. She racked her infinitely knowledgeable brain until she remembered what people did on earth to thank one another.

"Sekkesu", she muttered. Just then, Great Red felt a chill go down his spine. He was frozen in place, literally. Ophis had cast an ice spell on him, for what reason he didn't dare to dream. The rift was rapidly closing, and he had no other way to get to earth. Ophis drifted into his sight upside down.

"Sekkesu."

"… What? You mean that activity lower beings participate in because they can't just simply clone themselves? No thanks." GR refused, he saw it as a waste of time.

"… No choice." Ophis made it clear that it was her way or the highway. Since she'd probably just chase him down again if he chose to break free and run, he complied.

"Oh joy."

(Time-Skip: 2 Years)

"Whoever knew the beings of that world participated in such fun activites", GR boomed from his chest. It had been 2 years since what he referred to as the "Big Bang", and he now stood over his… son?

"I told you so." Ophis had a triumphant smirk on her draconic face, indicating that she felt somewhat accomplished. The passing of 2 years was like an attosecond to immortal beings, so the memory of this "sekkesu" activity was still fresh in their minds. From it came a being who was the combination of both of them, a dragon who had chosen to take on the form of a male at birth. His name was "Issei", although the meaning the word held didn't apply to him as he wasn't even born in a regular dimension.

"We should probably let him visit earth for a couple of thousands of year." Great Red, whom Ophis aptly named the "Vacation Dragon", stayed true to his namesake. "If he's ever in trouble, either one of us could easily go down there since we learned how to open the rift there specifically."

Ophis was floored. She had known her son for less than a second in her time, and now this lazy bastard wanted to send him off to an environment that a war was fought in last she visited?

"… Not opposed." She didn't really think it through much after all! Her motherly instincts were kicking in, but she thought it'd be good if her son "conquered" a world or two and had grandkids (yes, she's the doting mother type). "Let's do it."

"Ahahaha, that's the spirit!" GR opened his mouth and fired a beam of incredibly dense fire in no particular direction, linking the earth and the dimensional gap.

"Wait!" Ophis shouted almost immediately. She waved her hands, and Issei changed from his current form into the rendition of a Japanese male that she had seen prior to leaving earth (AN: we all know Issei's canon appearance, it's the same here but taller and more muscular).

"Good to go." Shortly after, Issei was tossed into the rift and ended up in Japan, his omnipotent parents shedding anime tears at his departure.

"Find a woman like your mother!"

"Don't be like your dad!"

With those goodbyes, the portal closed, and so began the tale of Issei, the Dragon God Emperor.