Issei and Isane Hyoudou were twins of ten years of age, one male one female, and they were both currently playing in the local park; and right now, they were middle of a game of hide of seek, with Isane the one seeking while Issei the one hiding.

With Issei trying to find the perfect hiding spot where his sister would never find him, but as he did, Issei let out a yelp of pain as his foot hit something hard.

Issei looked down at this right foot, and he saw what looked like the remote for the television but it had a screen on it, so it looked closer to a phone.

"What is this?" Issei asked as he picked it up. And then he did. Issei saw the white paint on it turn red. "Woow."

That was so cool.

Did he find something from out of a Sentai?

And at that thought screen lit up in bright white light, and then it vanished. Issei Hyoudou vanished from the park, where one year later, he reappeared, found by his sister who never stopped looking for him.

The only thing that proved to Issei outside of the time he was gone, that the adventurer he had been, the long life he had lived, was not a dream was the now inert device colored in red that was in his pocket.

His Digivice.

Xxx

5 years later.

Issei Hyoudou opened his eyes and looked around his room as he awoke from the dream that recalled to him very, very old memories from his point of view.

And then his most recent memories slammed into Issei's head, and he clutched his bed sheets, he grinded his teeth.

"We failed, we failed, Prez," Issei said in despair as he got up from his bed and looked over at the other end of his room, where he could see the still sleeping form of Isane, who was currently being hugged by a sleeping Asia. One of Prez's two Bishops.

The twins were Pawns of Rias Gremory; he was worth seven, and she had been worth one.

And how that had come about was a memory that Issei would never be able to forget, as it came about from him getting betrayed by a person he thought wanted to be his girlfriend. But Yuma turned out to be a Fallen Angel that wanted to kill him.

And because of his disappearance and then his reappearance, Isane had been very, very protective of him, and so when an unknown girl asked him for a date, she had obviously followed them.

And then Raynare had revealed her true self; Isane had tackled him out of the way at the first swing as his rusty body and not able to comprehend what she had just said, as he never expected The Human World to actually have anything dangerous in it.

But he had been proven wrong, so very wrong.

And then both of them had died, Fallen Angel gleefully stating that she had wanted to kill both of them as she had not been sure which of them had the Sacred Gear that Big G had cursed them with.

And then they had been resurrected by Rias Gremory as Devils.

And from there, they had been introduced to Devil Life, learning about the Supernatural on Earth, getting revenge on Raynare, and getting a new best friend in the form of Asia.

And Issei and Isane learned that both of them had Sacred Gear; Issei's was the Boosted Gear, denoting him as the Red Dragon Emperor, though, with that, it had finally clicked in his head where his first partner had come from. As no matter how much he tried to communicate with Ddraig, he got no response, as if the Boosted Gear was empty.

Isane had Twice Critical, a Sacred Gear that was based on the Boosted Gear, but could only double power once, whereas he could do it ten times. And only ten times, though not that it did him much good as he was the weakest Red Dragon Emperor, his body was weak, he had little to no Demonic Power, or even Magical Energy.

And then…

Riser Phenex had appeared and made everything sour as he and Prez's parents just couldn't let her do her thing. And Issei hated it, but he could get why; he was the Red Dragon, and if given time, he would grow strong enough eventually that Rias would have enough power to demand anything with a Rating Game.

So they had to do it early enough before that could happen.

And so a Rating Game would occur.

With a week to prepare for it.

The time was mostly spent getting Issei and Isane up to speed, strengthening their bodies so that the boosts had more to work with.

If only he had…

But it hadn't been enough. They hadn't been strong enough, they had failed to save the Prez from her fate, and now she was gonna marry a guy she wanted nothing to do with, who was honestly a shit match up for her.

She was Rias Gremory, the heir to the Gremory family; why was her arranged partner the third son of the family? Issei felt insulted; why not a fellow heir?

Was Prez not good enough?

Issei walked over to his desk where his rather advanced and expensive computer setup stood, as he needed all the processing power for the coding he was doing in trying to make High-Code Program work. Issei spent all the money he earned from odd jobs and got from his parents to make this. Issei looked at his desk, and he picked up a note that was on it.

Lord and Lady Hyoudou, if you are reading this, it means you have recovered enough to wake up, as you suffered many injuries from the Rating Game; attached to this note is Teleportation Circle that will take you to the Wedding Reception in the Underworld on the date of…

Issei looked at the corner of his now booted-up computer screen and saw that today was the day, meaning that he had slept for three days to recover, and Isane looked to be still out of it. And going by the time it the wows would happen in an hour.

Even if there was nothing he could do, he would still go, as he still had to be on Rias' side to make her feel better about all of this.

And do remember to alleviate any concerns you might have if you decide to come -Grafiya Lucifuge, Queen and Wife of Satan Lucifer.

Issei couldn't help but chuckle. Did she think there was still a chance?

Issei had to admire her confidence in their abilities.

Issei sat down on his chair and started typing, as booting up the High-Code Progaming program as he began to finish the touches on a spell he had used so many times, to just maybe… maybe there was a chance.

Issei activated the communication spell. "I don't know if this is gonna work, if you will even get this, that you will be able to hear anything; you've all probably moved on, forgotten about me; one year in the Human World was over a thousand years with you all. But please… if any of you remember me, my subjects, my comrades, my friends, and partners, your King once upon a time is asking for your help, your General, your Tamer is asking for your help, Issei Hyoudou is asking for your help to save one I care about from a miserable situation… please."

Issei ended the spell, and so it was sent from his computer, the magic intending to send it from the Human World to the Digital World.

Issei leaned back in his chair and just let out a sigh after five minutes passed by.

"Of course… I should go and find a suit or something," Issei muttered to himself, but as he stood up, he heard it.

A voice.

A voice, a voice that was coming from his…

Issei turned his head and looked at his computer screen; the window of the program he had used to construct his spell was now pure white.

It was garbling sounds, but as the second ticked by, the voice got clearer and clearer, and he could finally hear what the voice was saying, and it was…

"ISSEI!"

His name was shouted by a voice he never thought he would hear again, and on his desk, a device connected to his computer lit up in a way it hadn't in five years.

And deep within Issei's chest, a flame of power ignited that had not been fueled for just as many years as, for the first time, the Human World and the Digital were truly connected.

"I AM HERE PARTNER!"

Xxx

Rias Gremory could only feel sadness as she stood in a wedding dress next to Riser, as the 'priest' read of the wedding wows, the bastard looking smug as all hell as he had one arm tied with hers.

Rias had actually nothing against being married; she just didn't want it to be with Riser as he was an entitled bastard, but even so, she would have been able to accept the arranged partnership if the flaming bird had actually put in any effort to actually know her.

She had tried, but she had practically been ignored, and he had gone off to make decisions without consulting her, his would-be bride and wife-to-be. As Riser seemed to forget that he would become a Gremory with this, that he would always be beneath her as she was the Gremory heir, and he was the third son.

But Rias didn't want a loveless marriage that only existed so that she could pump out kids that might get all the bloodlines that she had inherited.

Both the Gremory and the Bael.

She just wanted a husband who actually loved her, a partner who genuinely cared for her, just like Mom and Dad, just like her Older Brother and Aunty.

Was that too much to ask for?

Apparently.

"And so if anyone has anything against this demonic union." Well, if there was one thing Rias found amusing about this, it was how Devil Weddings was just a perverted parody of what humans did. "Speak up now or forever be silent!"

The sound of doors crashing open was heard, and everyone turned around to see who had caused the commotion. And Rias felt her heart start beating faster.

"I OBJECT!" Issei Hyoudou shouted as he walked in, and Rias started blushing as she saw the outfit that Issei was wearing. Because he looked like a manwha protagonist with that white coat and the very, very tight undershirt that highlighted his abs. "I, Issei Hyoudou Pawn of Rias Gremoery, object to this insult and humiliation of the Gremory name!"

And Rias was taken aback by his words and his demeanor, as this was very different from the Issei she knew, the shy computer nerd that had a mind of tactics, which stood in contrast to his openly perverted(He was a pervert too, but he didn't shout it) and overprotective twin sister.

"Are you a gluten for punishment, you damned Pawn! Who are you to make demands? Guards seize this interloper!" Riser shouted, and Rias saw the Devil guards advance on Issei and…

Woosh!

Was the sound the bodies of guards made as they were sent flying through the Devil Cathedral into the walls at the other end by a singular punch from Issei, whose fist glowed with a red aura…

When did Issei know Touki? Rias thought and she could see in the corner of her eye her Cousin smiling like a loon.

"Who am I? Who are you? Who are you to think you are worthy of marrying Rias Gremory, Heir to the Gremoery named and household? You are the third son and the weakest Phenex in terms of potential."

Rias was pretty sure she would be able to hear a needle fall at the sheer lack of sound that was being made.

Which was quickly broken by Issei.

"She is the sister of Satan Lucifer, carrying both the blood of Gremory and Bael, so I ask again, who are your third child? What worth do you bring? Nothing." Issei stated. "You bring nothing but weak blood; if this was a marriage to create strong Devil children, she would be marrying your siblings; even the sister is a better candidate, from what I can sense. You would only dilute the strength that Rias Gremory's perfect womb brings to bear."

Rias started blushing harder at that.

"Wow, is that actual Issei? He sounds like our siblings when they verbally eviscerate people," She heard Sona say, her best friend having snuck up beside her.

"Yeah." Was all Rias could really say to that. This was very different from how Issei usually talked and behaved; right now, she could see none of the boy who had been Gasper's secret online friend. Instead, it was like Sona said, she looking at her brother, a king laying down the law.

"That is why I object to this, for the weakness you bring."

"I… I beat you; I beat all of you!" Riser shouted.

"Yeah… but you've reached your peak, Riser; you never be stronger than you are now, unlike your siblings, especially your sister, and we, Peerage of Rias Gremory, have barely reached our peak, me and my sister and have only been devils for two months, and we took out your entire peerage. If we had until summer? You would have lost. Because you feared me," Issei spoke as he held out his left arm, and around it manifested the crimson gauntlet of the Boosted Gear. "Hell, I could do it myself. Heck, I can do it now as I've regained strength I thought lost, so I, Riser Phenex, challenge you and your entire peerage to rematch the prize, Rias Gremory's Marriage!"

"Issei," Rias whispered, and she could barely believe her ears and even her eyes.

"Are you insane? You think you can just-" Riser began, but he was caught off as a new voice spoke up, one that Rias had not expected to even be here.

"I am in agreement with the Red Dragon Emperor," Everyone turned to look at the balcony where Zekram Bael was now visibly standing and looking down on everyone. "The Pawn speak truth; this truly only a thing that benefits the Phenex; what does the Gremory get out of it? A discount on Tears? Children with the potential to inherit nothing? What do you think, Lord Lucifer?"

"I think there is sense to the Red Dragon Emperor's logic, but what do you intend to provide? You are basically asking for Riser's place as husband?" Her brother asked Issei, who did not falter under the gaze of both the King and the Satan; it was… as if he was used to being in the room with beings more powerful than him.

"What I want is for Rias to choose for herself, but if you want to know what I provide? Then let us fight?" Issei answered.

"Lord Lucifer, Lord Bael, you can seriously not be entertaining the words of the weakest Red Dragon Emperor to appear," Riser spoke.

"So you support his words?" Sirches asked, and Rias had to refrain from laughing.

"Wha-what?"

So you support his words, Riser Phenex?" Sirches Lucifer repeated. "For if you believed that his words have no merit, defeating him should be the first thing to do, to put him in the dirt and show of that you are not weakest, Phenex. Have you and your Peerage Dominate, the Dragon of Domination."

Rias wanted to hit her brother for doing that, but Rias guessed he was feeling the same thing that she did; that was now something different about Issei.

Something had changed while he had been recovering.

And since Isane wasn't with him, Asia was still busy healing the other Hyoudou as she… Rias did not want to think about the image.

"Fine, I do it, I will show this interloper what happens, then you challenge Riser Phenex," Riser declared.

"Excellent, let us move this to a better venue then," Sirches said.

And within minutes, everyone teleported out, and Rias found herself standing in the stands of a Coliseum, specifically the copy of the Coliseum; it had been a gift from Mom to Dad on their fifth hundred anniversary, and it served as a source of entertainment when they were feeling either gladiatorial or theatrical, and now it was going to serve as the arena for Riser's and Issei's battle for her.

"That Pawn of yours definitely has guts, Rias," She heard her father say, and she turned to look at Zeoticus Gremory.

"Well, this wouldn't be happening if you hadn't rushed things," Rias replied.

"We had your best interest in mind, though reasons the boy gave are, well, we truly don't get much out of this, and well, it will hurt you in the long run," Zeoticus replied, which made Rias glare at him.

"Dear, I think you are just digging your grave deeper, though Rias, you've certainly got quite the Pawn; he spoke with such passion and authority, I should definitely get to know him better," Venelena Gremory said, and it made Rias want to bury her head in her palms.

"Doesn't be a cougar, mom…" She groaned.

"I don't think he would mind, fufufufu," She teased, but as her eyes looked onto the young Pawn, she couldn't help but feel her heart start to beat a little bit faster.

There was something different about that boy, and she wasn't talking about the Boosted Gear; no, it was that red aura he had used before that had been something she did not recognize, and Velena Gremory had fought in two wars.

It was something wholly unknown, and that piqued her interest.

She wanted a part of that; her devilish greed demanded it.

Xxx

"So for this fight," Issei began as he looked at Riser's peerage that was currently standing about a hundred and fifty feet away from him. "I just wanna know one thing before we begin."

"And what is that, Issei?" Sirches Lucifer asked from the stands.

"Can I use a familiar?" He asked, taking everyone by surprise.

"Be my guest if you think a little animal is going to help you beat this Riser," Riser stated.

"You have permission to summon your familiar," Sirches Luficer said, and Issei could see him shaking his head. Probably bemoaning Riser's attitude as while most people have cute Familiars that were mostly helpers such as Rias' bat and Akeno's Gaki Oni.

People could have powerful beings contracted as familiars, with the most wanted being the former goddess of Mesopotamia.

"Great," Issei reached into his pocket and pulled out the most dangerous weapon in this world. "So come on out, Dracomon."

Issei pressed a button, and with a flash of light, a white and red-scaled dinosaur-looking creature with a pair of tiny wings on his back that made it look like a child's drawing of a dragon rather than anything that was accurate.

Issei looked down at his very first Digimon partner. "Or should I say Ddraig?"

"Tsch, you figured out my true name, partner," Dracomon, or rather Ddraig, replied.

"I mean, then I woke this up, and I got no response; it was pretty easy to figure out," Issei said.

"It would be, so I didn't get to explain, but I don't have a lot of energy to evolve on my own; I had to discard it during the crossover," Ddraig stated.

"And I've only got enough charge to get you to Ultimate, and I wanna make a statement…" Issei added.

"Bio-merge?"

"Bio-merge." Issei agreed.

"Bio-merge, initialize!" His Digivice spoke, and then the entire area was consumed by crimson, and what emerged from it was…

"Slayerdramon: Welsh Dragon Mode!"

Xxx

What the actual fuck? Was all Sirzechs Luficer could think as he saw Issei Hyoudou, his sister's very dedicated pawn, seemingly summon Ddraig from the Boosted Gear using that device in the body of a creature he assumed was called a Dracomon, which Issei then proceeded to fuse with it to obtain a Sub-Species Balance Breaker he had never seen before.

And Sirzechs had thought a lot of Red Dragon Emperors across his almost six hundred year long life.

Most of them rampaging in Juggernaut Drive.

But even so.

This was something entirely new as, thanks to it, Issei had jumped from Low-Class to Ultimate-Class and then had proceeded to slaughter Riser's Peerage.

With one attack of that whip sword, he now wielded that had carved all but Riser and Ravel into pieces, leaving them all of them alive but mutilated.

And now, for the last minute, he had been carving Riser into pieces over and over again while he and Ravel tried to stop him with hellfire, but that seemed to do nothing against the crimson scales that covered the humanoid dragon that Issei Hyoudou had become.

It was such a display of calculated violence that Sirzechs thought he was looking at himself and his friends during the Devil Civil War.

"Do you surrender," Spoke the deep voice of The Red Dragon Emperor. "I can keep going, maybe even, but in a little more effort."

[Boost]

Oh… He hadn't Boosted yet. Sirzechs thought and while it was nowhere near his level, he was currently about the fifth strongest being in the room at the moment.

"You… you monster!" Riser Phenex shouted in fear as he tried to blast him with fire that just now flowed off.

"Haven't heard that in a while," He said as he brought him down on his skull and started to press his skull into the dirt of the coliseum.

"I think you've made your point, Issei," Sirzechs spoke. "There is no way for Riser for to beat you, so I shall declare you the winner."

"Fair," He replied, and in a burst of crimson light, there were two beings once again, and the Coliseum was silent in the aftermath.

"Who… are… you?" Riser Phenex asked as he looked up at Issei with fear.

"I let them do the honors," Issei said as he pointed up, and Sirzechs followed it, and in the air; he saw twelve circles appear in the air, and from it appeared several beings that Sirzechs had never seen before in his life, though some looked similar to ones he knew.

And they were all-powerful; he could sense it; all of them were beings that would be at least be Satan-Class, and a few felt like gods.

"We are the Royal Knights!" The declared in sync. "The personal guard of King Issei, Ruler of the Digital World, the Crimson King, the Lord of Data, the Red Conqueror, The Great General. Revere and praise his name!"

Xxx

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