A/N: I don't own Highschool DXD and Fate / Apocrypha or the other fate series, just the story.

"talking" ""talking in unison""

"thoughts" ""thoughts in unison""

Flashbacks / dreams MULTIPLE VOICES

[Ddraig talking] [Ddraig talking with host]

(Albion talking) (Albion talking with host)

Prologue: A love that crosses worlds

It was a place which existed nowhere else. A different world, where man would never stand its feet on.

Released from the concept known as 'time', the place had neither morning nor night, sun nor moon. Only a pale aurora lit the sky.

There are no changes in this world. Its wide ocean did not know of waves, and the clouds in its sky did not know of flow. In this world, there is a creature, a very strong and majestic creature. This creature was known as the 'Phantasmal Beasts', beings that can only be seen in legends, myths and lore. Said beast has a reptilian feature; large wings and teal colored scales but its noticeable feature is the crest on its chest. The beast was called a 'dragon', a top-tiered mythical beast, one of the most powerful creatures known to man. This majestic dragon is somehow lamenting due to the lack of moon and stars in this world.

That was why the dragon closed it eyes. As it fell to its slumber, the dragon dreamt of the memories of dearly missed days, too many memories back in the days when 'He' was 'Human', whether their good or bad.

He was so very proud of his past, even after he keep dreaming on it a thousand or ten thousand times, He never get tired of it.

As always, moments in his past would be projected into his eyes, vivid and distinct. His past had been short and thus, its scenes were always clear. They would never fade – never be polluted – and never, ever be forgotten.

Unbeknownst to the dragon, a being not a residence of this world has entered, walking its way to the dragon. Base on the newcomer's appearance, it is a woman wearing only a tattered white dress.

"Wake up, please." A soft voice was heard, by its tone, it was pleading.

Once more, there are no changes in this world. Winds did not blow, waves did not break. It was simply a static place. That is why; if change were to occur in this world… it would unmistakably be an interference coming from the outside. So the man / dragon opened his eyes. Seeing the unbelievable, he froze. His emotions were swayed by the sight of a familiar woman in front of him.

"It's been a long time." The woman said.

Before him, she smiled. The man felt his brain was being jolted, and the sensation made his mouth open from which words no longer came.

A lovely girl was there, her hair soft as springtime sunlight. The man knew her well. Every time he closed his eyes, she would appear. He would never mistake her for another. But why was she here? Here, where she must never be.

(Start Insert song: "I Love you" by Hiroyuki Sawano ft. vocal Sekiyama Aika)

The girl's brows knitted in sorrow and then reached out her right hand to the dragon. Upon seeing this, the man responded by lowering his draconic head to the height of the girl. She softly touched the man's face with her hand. Her finger, pointing out as though in appointment, made the man breathe out a sound of joy.

"So many wounds… so alone, in this world. This is entirely my fault." The girl murmured sadly.

"That's not true." The dragon said within his mind and rubbed its snout to her hands as a sign of comfort to the girl.

"I won't ever leave you by yourself any more, Sieg." The girl said to the dragon with tears threatening to fall from her eyes.

"Ah – yet your words, the fact that you're here, brings me joy. Simply nothing but joy." He thought.

It should have been an unchanging, perfect world. A world where time was frozen. But the girl is here now. And perhaps, it has fallen, no longer perfect, becoming a vulgar and common world. The man that is now known as Sieg could not contain his happiness. By some miracle, the dragon was enveloped by light and its size shrank and the shape changes into a human. When the light died down, a man appears in place of the dragon. He has a short spiky whitish brown hair with crimson eyes, he has a slightly toned body and his only clothing was a black pants but the most noticeable in his features is that he has wings, the draconic ones, a pair of horns on his head, a tail on his lower back and the glowing crest on his chest which is reaching up to his cheek.

"I promise, I will always be by your side. We'll always be together, Jeanne." Sieg said and smiled to the girl that is now known as Jeanne.

And so, the world will change and time will march on.

(Instrumental music: "I Love you" by Hiroyuki Sawano ft. vocal Sekiyama Aika)

…..

Many times has pass since the fulfillment of the promise between lovers, Jeanne stayed at the reverse side of the world never leaving Sieg alone. Every single moment they are inseparable, always holding each other's hand whether they explore the world they currently live in or just sleeping under a tree surrounded by flowers. They also talk about the past, Sieg explained to Jeanne as to what happened after her 'death'. Upon hearing this, Jeanne was somewhat sad that Sieg has to make a sacrifice and leave some of his friends behind.

"I'm so sorry, Sieg. It's because I left you alone to fight him by yourself, you would not have to make this sacrifice." Jeanne said with regret but Sieg comforted her by squeezing her hand lightly.

"It's alright, in fact, I have no regrets on how I live my life. Short as it may have been, it was meaningful especially when I met you that day." Sieg stated to reassure her.

"At least I have left my mark to the world in this short life of mine." He continued.

"Indeed you did, by becoming the first dragon in the modern era. Geez! How can you be so reckless? Why go so far to the point of giving up your humanity?" Jeanne scolded him for his past actions, but then her expression softens and caresses Sieg's face.

"I only did what I did not because I want to be a hero or not as grand as saving the world. It's a much more selfish reason actually; I did it because it's for the sake of one person. Saving the world was only the effect of the actions that I took." Sieg replied.

"Now look at you, even your appearance is human, you are still a phantasmal beast. Even if you are strong, you are fated to be alone in this world and loneliness is something every creature cannot fight." Jeanne continued while she lovingly caressing Sieg.

"It's alright, Jeanne, I'm fine now because you're here with me." Sieg could only smile at her. Jeanne notices it immediately that this is the first time Sieg actually smiled.

"Really, never trust a man when they say they're fine." Jeanne could only smile herself, after all, it is all in the past now. Sieg upon hearing the statement was silent, back then, He did not understand those words when Jeanne said it to him the first time, but now, He can understand a bit even slowly.

A moment of silence, both staring at each other, they eventually laugh at each other thinking of how stupid they have been. After reminiscing the past, Sieg and Jeanne looked at the aurora lit sky just passing the time until they fall asleep in each other's arms.

"Jeanne, do you think if were able to live much longer back then, what would have become of us?" Sieg started a new topic of conversation, but this question made Jeanne blush.

"W-Well… I guess we'll start living together on a house in the country side away from the noise of the city, and then someday we'll get married and have children of our own." Jeanne dreamily said.

"I see. I think it's a good idea to form a family. I wish that I could have that too." Sieg muttered sadly.

"If only we are to be given a second chance in life or to be reborn in the next life. I would gladly form a family with you, a family full of love." Jeanne said lovingly as she stares at Sieg with a smile on her face.

Unknown to the both of them, the wish-granting device known as the 'Greater Grail' heard their heartfelt wish and beginning the process of granting the said wishes. The moment Sieg and Jeanne felt the surge of mana within the grail, it was already too late. Their bodies start disappearing into motes of light.

"What's happening to us!?" Jeanne said in panic as she holds Sieg tightly.

"Perhaps the grail heard our wish." Sieg could only say those few words not believing that the grail has becoming active now at all times.

(Start chorus: "I Love you" by Hiroyuki Sawano ft. vocal Sekiyama Aika final part)

"I see. Once more, we're going to be separated again and be reborn on who knows where." Jeanne said her tone filled with sadness, tears threaten to fall from her eyes. They were granted eternity to each other but fate became cruel to them.

"Jeanne! I swear to you no matter which lifetime we are to reborn into, I will find you and we'll be together again! I promise to my heart and soul, I will find you!" Sieg exclaimed filled with resolve.

Jeanne's eyes widen at Sieg's declaration, but it immediately softens as she gives him a very lovely smile.

"Then I will wait for you! I'll only devote myself to you and I promise you, I will keep searching for you too!" Jeanne declared her promise with a resolve equivalent to Sieg's.

Words have been said. A promise has been declared. Fate as the only witness, the two stared lovingly at each other for the last time as they slowly disappear in the motes of light. Etching their form into their memories swearing to never - ever forget each other, hoping that one day they will meet again and be together forever.

"I love you, Jeanne." Sieg said lovingly.

"I love you too, Sieg." Jeanne replied with the same tone.

After saying those vows, they lean and captured each other's lips. As they kiss, their bodies finally disappeared into motes of light forming two balls of light. The balls of light suddenly flew towards the aurora-lit sky travelling to a location unknown to anyone.

(Song end)

Unknown dimension

In an unknown place where there is neither day nor night or even land nor water, a place where all you could see is nothing. Yes, this place has only nothingness, an infinitely dark place with different iridescent colors. This dimension was called 'dimensional gap'; a place between worlds which to say in order to cross to another world, this place is the only way to travel. But the dimensional gap is a very dangerous dimension because no living being can stay within it without protection, if one traverse the dimension unprotected, their bodies will disintegrate immediately.

However, the dimensional gap is the home of two very strong beings; the dragon gods, Ophis the ouroboros dragon, also known as the 'dragon of infinity' and the other one is the Great Red the apocalypse dragon also known as the 'dragon of dragons'. The later is currently swimming in the dimensional gap doing some stunts but somehow the dragon looks grumpy and bored.

"*SIGH* I'm so bored right now. I would really love to watch every being in different parallel worlds but even though they have different versions of their story, they also have something in common. So similar that it became so cliché, boring even! I have watched every world and not even once that the humans could keep up with the supernatural, every single world they are just every supernatural entities' bitches!" Great Red, one of the strongest beings, could only whine like a kid just because he felt bored.

"Great thing is that at least one boy could alleviate my boredom. That Hyoudou Issei boy is really interesting and I want to watch another version of him in another parallel world. But I couldn't even watch in earnest because some chibi keeps calling me Baka-Red while raining some energy blast to me! " Great Red followed up his statement laced with irritation.

While Great Red was so busy whining like a kid, It came to his notice that there are two balls of light pass by him towards to the world that he is about to watch over.

"I see. Those two souls were about to be reborn in that world huh." Great Red said.

"Oh yes~ and not just that, the girl will be the reincarnation of the very heroine which is her real identity while in the boy's case is rather a rare occurrence. The boy will be reincarnated and be reborn as Hyoudou Issei in that world but at the same time, the reincarnation of a hero who was known as the dragonslayer. In short he will have two past lives." A voice was heard by the dragon and when he turned to the owner of the voice, Great Red saw an old man with white swept back hair and white beard; he has blood red eyes and dresses like a noble.

"Oh! If it isn't the old man! Are you here to also watch this world too?" Great Red asked the old man in an amuse tone.

"Well, I only check the strange phenomenon that I felt and here I am finding out what it is but this sure is interesting you know the unknown future of that world. And by the way I have a name and that is not old man, its Kischur Zelretch Schweinorg to you." The old man now known as Zelretch replied with same tone.

"Heh! Whatever old man. So it's another version of Hyoudou Issei , huh? It's really interesting to watch his battles every time." Great Red said with glee.

"That boy's destiny is always to become a hero whether he likes it or not. In every parallel worlds, he makes changes that can shook the foundation of the supernatural world, I wonder if it will be the same in this world too." Zelretch stated in a excited tone.

"But speaking of that world, I could tell that it is similar to the worlds that I have seen previously but there is one difference." Great Red spoke with curiosity.

"Ah yes! The legends of the heroes of that world are the same with the legends from the worlds that I have seen. In other words, this world is the mix of the world that you're watching and the world that I'm watching. Sounds fun doesn't it?" Zelretch followed now more excited on the events that will happen in the world.

"Yes, it sounds fun. It seems that the bloodlines and reincarnations of heroes are common trend in this world so humanity won't lose to the supernatural." Great Red said happily.

"So, let's watch this world together, shall we?" Zelretch asked having a smirk on his face.

"Yes, we shall." Great Red smirked and replied.

And so the start of the new tale of heroes, promises and fated love that will shook the world whether it is ordinary or supernatural. A story of how the 'Age of Heroes' begun.

To be continued on the next chapter…. The Dragon blooded Knight

AUTHOR'S NOTE:

Hello readers! Here is my new fanfic which the crossover between Fate series and Highschool DXD. I was inspired to create this due to my likeness to the Fate series this recent days and I hope that whoever will read this would like it. Well, the moment you see this fanfic I'm sure you would know who are the main characters. I also wanted to tell you that there will be elements or slight crossovers from other animes so that you would know firsthand.

This is the prologue chapter, to those readers of Fate Apocrypha light novel, I kind of picked some lines from its prologue chapter but I did my best to change the wordings and a follow up events since the thing that I portraying here is that how it begun for our main characters, how they ended up in the DXD universe or even a parallel world of DXD with the mix of heroes from Fate series or Nasuverse in it. It just pops out on my mind so I just write it here for my own satisfaction; I hope you would enjoy this fanfic of mine. Feel free to type your comments but if you don't like the story, I would understand but don't flame on me okay.