Disclaimer: I don't own DxD or the Fate series, each belongs to its respective owners and companies. I only own my OCs.

AN: Made a few edits here and there for grammar and structure. Also updated Ryuichi's harem as well.

High School DxD: Heir of Camelot

Chapter 1: From Dream To A New Reality

You know they say fate isn't in our control, that it's not something we can stop that it's our destiny. But I've never believed that we're all capable of being our own person no matter what spot we find ourselves in.

But for someone like me, it was more awkward for me when it happened.

Oh… you want to know what happened to me? Well, let me tell you: I died.

… … …

Wow, tough crowd. But in all honesty, it's not that I died to get where I am. Well, I did it's just…

Hah, let me tell you the story from the beginning…

Present

It was after another day at college I was finally done with my homework, studies and after a small binging of some anime I had finally picked up after leaving alone for so long, I was finally ready to go to bed.

Recently I had begun watching things such as My Hero Academia, High School DxD, and even the Fate series, just finishing the Fate/Prototype spinoff.

In my opinion, Male Arthur is way cooler than Artoria. Hey, just got to say facts here. I finally turned out for the night and as I began to lay to sleep and close my eyes I began to feel light, lighter than I ever felt in a long time.

As I feel deeper I then began to have a dream but not one so peaceful as many have…

Dreamscape

There were sounds of steel clashing and bones crushing as men fought to the death until suddenly as one knight clad in grey armor took out another enemy knight.

"Where are you King of Knights!?" They bellowed out. Until suddenly the "king" in question appeared before them.

"So then, tell me?! What do you think of me know? Your kingdom is gone? Do you think I am worthy know, eh!? Do you hate me, for what I've done, Arthur?!" The knight in red and gray armor questioned the king.

This king, Arthur was covered in gray armor in most places but carried blue patches of cloth along his arms and legs as they blew in the wind. In his hand lay the sacred lance, Rhongomyniad.

"No, I do not hate you. I am only sorry that I never could tell you the truth. About your mother and your birth. I'm sorry for it all, but this is where it must end, Mordred." Arthur says with emotion in his throat.

"Don't toy with me, you don't hate me?! I just rebelled and killed your retainers; your friends and you dare say you feel no hate?! What kind of human are you?!" Mordred screamed at "his" father.

The two knights then one last time charged their opponents, as Mordred stabbed Arthur with Clarent, Arthur's lance hit true as well and both were grievously injured.

"Fa…ther" Mordred said weakly as he then slumped down dead on the lance. Arthur himself begins to walk away slowly as he too was injured but has retained some of his strength.

As he walks he comes to a familiar lake as he finally rests on a tree nearby when he then hears an approaching horse, and someone drops from the saddle.

The knight appeared and the silver arm was all Arthur needed to know who it was.

"Bedivere, tell me? Was all of this worth, for her and everything else? Was I really worthy?" He asked his retainer.

"You stood for what you believed was justice, fairness, and benevolence. Only you can answer that question, my king." Bedivere answered.

"Bedi… take Excalibur and return it. Please… it's my turn to sleep. Ven… I hope I will see you one day again." Arthur finally closed his eyes and passed peacefully.

Bedivere then took the sword as he then turned to the lake and gently retired the sword from its duty.

He then retrieved his lord's body and rode back to Camelot to bury his king. However, a white-hooded figure watched from the woods.

The hooded figure let out a chuckle as he whispered, "Long live Avalon and Camelot." As the figure disappeared in a whirl of flowers.

End of Dream

As I rose from my dream I yawned loudly. That was probably the most vivid dream I had ever had. And why did it feel like that guy with the hood was looking at me or something?

As I suddenly got out of my yawn I get up out of bed to realize I'm not in my dorm room and this doesn't look anything like my room at all.

The place was bare, nothing on the walls just a plain jane old room, as I left the room I noticed I was wearing my clothes from class the other day.

My blue sweatshirt with my white t-shirt underneath, with blue jeans and brown tennis shoes. As I inspected the rest of the unit I noticed a full kitchen and living area along with a large flat-screen on a sitting table.

I grabbed the key sitting on the table nearby and read the ID which strangely had both my original name and its translated version, Ryuichi Naruse.

That's my name from my world. But still were am I? I took the key and wallet and left the apartment to scour this new place for clues.

I then spotted on a note on the table which read:

To Whom It May Concern,

To the next owner of this unit. I wanted to tell you I was the one that brought you to this world.

While I know you would like answers I think it's better you find answers yourselves.

I will contact you again very soon, we will meet face to face but not now. You are needed in this world; something has happened to it. It is not the same as you know it to be.

Just keep that in mind.

Best wishes,

Mr. M

P.S. You're welcome for the clothes and board, I hope you're gracious.

Whoever this is, I'm gonna punch them is the first thing I'm gonna do when I see them. But still that dream from last night why did it look so familiar and that figure who was it?

I didn't have time for that, I needed to look for clues it was the only to help my situation whether I like it or not.

As I left the building the first thing I saw was the suburban neighborhood all around the street was lined with houses and some apartment buildings dotted from my vision.

I continued on as I walked around town until suddenly…

*grumble*

Ugh, I'm hungry.

'Well, I can't find anything on an empty stomach.' I thought to myself as I walked around and found a sign for a local diner nearby. I ordered a hamburger steak meal and just like they say it really does remind you of grandma's food and it did that very greatly.

After a full meal, I decided to take a quick trip to the local supermarket to buy some basic necessities such as basic foodstuffs and toiletries, along with some fresh ingredients for homecooked meals and some microwave food, just in case.

As I got home to my apartment another door opened as I opened mine and out came a girl, with long black hair. She was wearing a white-puffy mid-length dress and black skirt. She looks familiar.

"Oh, hello there I guess you're the new tenant who moved in?" She asked. Her face is so damn familiar.

Oh, right she's talking to me, "Oh, yeah. Sorry if I never introduced myself, my name's Ryuichi Naruse. How are you?"

"I'm good, my name's Yuuma Amano. I'm your next-door neighbor, it's great to finally meet you in person." She introduced herself formally.

"You too, you seemed to be a little dolled up. Sorry for prying, but is someone about to go on a date?" I said with a small smirk to tease her.

She blushed as she replied, "Oh did my looks give it away? Yeah, actually I'm meeting him today for a date. Oh, that reminds me I got to go, or I'll be late. See you later!" She said as she left.

As I closed the door and dropped the bags all the realization came to me in an instant…

I'm in the world of High School DxD and I just meet Issei's killer and didn't she say they're meeting today? That means it's the Sunday they wanted to meet, and she kills him by the end.

But what can I do, I'm just a human and she's a member of a supernatural faction. But can I really leave that kid to his fate? I mean I know Rias will save him but…

Leaving my concern by the wayside I leave my groceries as I rush from the apartment to find the park the two would be meeting at. Best to go ahead of time to the spot than to be too late.

After asking for directions to the park I seemed to be ahead of time as there were many people around the place. Some enjoying the scenery and children playing. I didn't want to look like the weird guy just sitting on a park bench doing nothing.

Who knows who could be watching Raynare's group or even Rias' peerage could be around since they probably know about his date. Well, I guess I need a cover for now.

I spot a group of some trees nearby and it just so happens to be the same group of them that overlooks the fountain where Issei and Raynare will pass by.

So I'll wait here and just look like I'm taking a nap in the trees, I was quite the explorer as a kid and climbing trees was a fun thing to do so here I go.

So as I finally reach the top branch I try to get as comfortable as I can get and then began to relax and fall asleep.

A Few Hours Later…

A few hours seem to pass by as the setting sun is evidence for that deduction and that those two "lovebirds" should be around soon.

I decide to hide just inside the tree line to cover myself in case she starts looking for witnesses.

I then see the two and can only see them from a distance but then I make out that distinct phrase,

"Issei, would you die for me?"

Holy crap, it's even scarier in life than behind a screen hearing it now. Issei looks confused as his "date" begins to transform into her Fallen form, her leathery coverings, and pads along with black-feather wings make themselves known.

Won't lie if I were Issei I probably would look at that body too, but unlike him, I at least know how to keep it suppressed.

Just as she was about to skewer him I then picked up a large rock and then chucked it at her.

"Not today, you black bitch!" I yelled as I went over to Issei. His face is still stuck on Raynare's body.

"Who dares to… Wait it's you?! How dare you?! How did you get passed the barrier?!" She began to ramble on angrily as my appearance ruined all of her plans for a swift finish.

She then seemed to temper herself as she then began to form more light spears in her hands as I threw Issei and myself in the other direction.

"Dude, snap out of it do you want to die young?!" I yelled at the pervert. It seemed to get him out for a second as I grabbed him, and we ran through the park together.

Unfortunately, we couldn't say much until another set of spears came at us this time one got me in the stomach, and one got Issei in the leg.

I began to bleed out as I tried to no avail to stop the blood from practically flooding out. Issei got another spear in the gut as he too began to bleed out the same as me.

"Tch, garbage both of you. A naïve, brat with a Sacred Gear and you…" She seemed to stop me for some reason.

With the last of my senses as I lay dying I could hear her gasp in fear, "W-What are you? You are nothing like I've seen damn it! If only I didn't have to kill you!"

I then heard her flapping wings go into the distance. What did she mean by that? 'Nothing she's ever seen before, what do I have a Sacred Gear but why…?'

What does it matter I'm about to die, but… I really want to live you know. I want to be something. Even as a Devil, I always wanted to feel like I belonged somewhere.

As my vision began to fade, I could see a shine of red come into my eyesight as I heard running coming over to us. And the last thing I saw another head of flowing back hair…

As I drifted off I could hear that same voice again from the dream I heard it speak but this time more fully in this darkness that surrounded me…

"The legend of Arthur is needed once more, and you my boy are to be his heir. You and you alone contain the spirit of Camelot and the great King of Knights, Arthur Pendragon

You must rise up once more and take the sword and bring light to this land for darkness approaches and only the light of that blade will illuminate the way.

I know I am telling you much, but this is all I can tell you for now. For now, get stronger, you will need to be strong when you meet 'her'.

The voice then disappeared once again as I tried to reach out, 'King of Knights, Camelot, and Arthur's heir? What does this mean?'

That answer couldn't come as a bright light took my vision as I then opened my eyes and saw that I was now once again in a different room than my apartment.

Back In The Real World – A Few Minutes Earlier…

As both Ryuichi and Issei's bodies lie bleeding to death three girls then arrive as a barrier covering the area before disperses and they check the bodies. The Issei boy they knew, but this one in the orange sweat, who was he?

As the trio looked toward the two boys Akeno was looking at the boy in the orange sweatshirt. Her forlorn look told all that her King needed to know what she was thinking.

This boy put himself in harm's way to protect a complete stranger it could only remind her of one thing, her mother's sacrifice for her when she told her to hide.

"Rias, please…" Akeno had begun but her king beat her to the punch.

"Don't worry Akeno I plan to reincarnate them both as my servants." The Queen's gaze lightened at her master's answer as a smile adorned her face once more.

"He was pretty badass for throwing that stone," Koneko said in her same monotoned voice.

Rias then began to assimilate the two and despite some issues with the process, the two decided to take them to safe locations. Rias would take Issei back to his home and since they had no idea where this boy lived Akeno would take him to the ORC's guest room to rest.

Back In The Present

You know when you see yourself bleeding to death it's not like how some people describe it as a sudden yet death-like feeing. It's painful, or at least in my case it was." To have your stomach pierced and what feels like your insides just being destroyed on the inside its… horrific.

But all I can is sigh that I don't have to… wait dead spirits don't sigh, do they?

I suddenly wake with a jolt as I find myself in a bed and room that's is obviously not my own room in my apartment. This looks more ornate and decorative than anything I've seen before in my lifetime.

Wait? Could it be that she actually… but why? I don't have a Sacred Gear, do I? Before I could answer that question I looked to my chest to notice I wasn't in my blood-stained clothes anymore and my wound was gone.

But who did the healing? I then felt a slight bit of rustling to my side as I dared to move the sheet I then moved it to reveal something I never thought I would see in my lifetime and oh boy was I in for a surprise.

"What the world…?"

It was not a head of crimson hair, but instead, the long, flowing black hair of one Akeno Himejima, and she was naked as the day she was born. I tell you now it took almost all of my willpower to not let a bloody nose take me over.

Hell no, I wouldn't let that cliched shit start now or ever in the future. But with a girl like her is that worth much? And to be honest the show never could do those girls justice this girl was drop-dead gorgeous more so than Rias in her own way. I guess that's why she's #2 in front of Sona as the #3. And those breasts…

'I am not Issei, I am not Issei, I am not Issei…" I begin to chant inside my head as I turn around to look the opposite way but a cute little yawn from her showed she was now awake. She stretched as she rose which then caused her breasts to bounce and jiggle more as I tried my best to keep my cool in front of the S&M Queen.

Her sweet voice then spoke, "My, my were you enjoying the show?" Her silky voice was almost mesmerizing as I turned around to look at her in the eyes knowing full well I probably will not look away when I do.

Looking at this girl at eye level is like looking a diamond at its absolute finest with no mistakes because it didn't need to be cut, cause it was like that when it was found.

Well now would be the time to play dumb at this moment, besides its time to see if I still have the ability to at least take some girls teasing.

"U-um, who are you? And w-why are you s-sleeping with me in the same bed? Naked?" I asked trying my best to look confused and groggy.

She lets out another of her trademark giggles as she then slightly pouted in my direction, It's alright I mean it was quite a night of passion we engaged in. We were drunk and there is now a great issue…" She then approached me from behind as got behind my ear.

"Huh?" I let out an innocent squeal as her breasts were now pressed up against my back. As in I could feel her nipples on my back.

At that point, I nearly melted but gathered what little morale I had and pushed, "Eh, you mean we had sex last and I-I can't remember anything…" I played along until I remembered what she said in particular.

'Hold on I don't drink!' I thought to myself in anger for being played so easily. "Dick move, lady. Joking about drunk sex ain't okay, you crossed a line there. This means war."

Akeno: 1

Me: 0

Deciding enough was enough we both decided to get dressed only for me to see a whole Kuoh Academy uniform and all hanging up on the closet nearby.

"You don't mind, would you help clip my bra back please?" Akeno asked as she shows me her sleek, hourglass figure I go to do so quickly as she then finishes dressing herself and the two of us leave the room.

"I know you have many questions about many things, but its best until the others all arrive. So please wait for a little while longer. The bathroom is further down the hall to the right and the main room is beyond the double doors to the left." Akeno explained

I decided that I hadn't checked myself in quite some time, so I decided to go to the bathroom and find out. As I entered I immediately went to the mirror and looked at myself.

I looked different, but my physical body was unchanged. My muscles and tone were still the same. I had been a black-belt in Judo by the time I finished High School and continued to exercise regularly when given the chance.

It was my looks that were different; I now had brown hair, instead of black; Green eyes instead of Blue and finally I didn't have my facial hair I used to have I was a smooth as a baby's skin, not even stubble.

After washing my face I decided to then journey down the hall to the main double doors and when I reached them and knocked I then heard a, "Come In" from the other side to see a large room with a desk in the front with a table in the center with two sofas in between them.

The Victorian-style was definitely seen, and the occult markings and papers did make the feeling prevalent.

At the large desk in front was the president herself in the flesh; her long, knee-length crimson hair with a strand sticking out on top. Her blue eyes with a tint of green, her looks alone showed why she and Akeno were compared side by side.

"Hello there, sorry for the sudden but my name is Rias Gremory, I am a third-year high school student and president of the Occult Research Club or ORC to be short." She introduced herself. As she finished the fallen-devil hybrid appeared with a teapot and cups.

"And I'm sure you are already acquainted with Akeno Himejima, she's also a third-year high school student and the vice-president of the ORC." Said girl then gave me her same teasing smile and look she had before.

She then left and entered the shower room, adding a layer of embarrassment now that I'm stuck with someone with Akeno. Instead of being her victim I simply found a seat and when she offered a cup of the tea I graciously accepted and then tasted the tea.

It truly was delicious, "This absolutely great, thank you Himejima-san." She seemed happy to hear and replied with a "You're quite welcome." She also made a cup for herself as she sat across from me.

After a few minutes, a knock came and in came a short, petite girl with a cat pin in her hair as she looked around she saw me and nodded to me and I did the same. Her expression never changing. She then sat on the sofa beside me and began eating her treats.

I'm not even gonna start on that… but a few minutes after that a handsome faced, blonde-hair boy came in with another guy with short brown hair with light brown eyes arrived in tow with him. It seemed everyone was finally here, and Rias finished her shower at the same time.

I then heard Issei saw under his breath that he was in heaven to which I let off a small snort however after seeing me he then went into a frenzy, "AAAAHHH, you're from the park! Please tell me you remember Yuuma from the park, please tell me I wasn't dreaming?"

He almost sounded like he was pleading, but I couldn't help but be impressed by his ability to miraculously change tone and manner so fast. But I decided to answer for his sake and others,

"You mean Ms. Leather-straps from the park, yes I do."

Just as his happiness was to show Rias entered with only a bath towel to cover herself. Unlike Issei, I looked away a blush still on my face as even I can't deny that she was rather beautiful but business first as they say.

"Now then I want to introduce our two new members into the Occult Research Club." Rias pronounced.

"Well, I guess I should say thanks." Issei first responded but Rias then continued.

"But you should both know this group is just a front. To answer, I'm not the only devil here." She answered.

"Wait, so what are you saying all of you are devils?" Issei said wanting to know the truth. I listened in trying to play along.

"Well, actually the woman who killed you two and the man you met are what's called Fallen Angels. Many think we're the same but were not." Rias continued as she explained the differences and history between the Three Factions.

"You both okay you seem a bit overwhelmed," Rias said a smile still on her face but a bit of worry in it.

Yeah, I mean you are talking some freaky stuff here." Issei replied. "Not to mention it's not every day, you see a girl suddenly transform into 'that' and then wish you dead," I added in my own two sense.

"That's right I almost forgot you say her true form too," Rias added as she looked at Ryuichi.

"Well, I got to say though this is really freaking me out so maybe I should just…" Issei got up to leave until Rias showed a number of pictures showing Yuuma and Issei together and some of Yuuma alone.

One stood out to me because something looked familiar to me, "Hold on, this number plate in this one. This looks exactly like the plates at my apartment complex."

"You mean she was your next-door neighbor; man talk about chances." Akeno piped up.

"I don't think we had ever met cause when I saw her she introduced herself and I asked her if she was going on a date with someone. Guess I know that answer now the hard way." Ryuichi replied.

"But just curious where did you get all of these?" I asked them as everyone was turned towards me.

Rias answered, "We felt an unfamiliar magical presence enter our territory recently, so we've been putting them on tabs for some time now this all we've been able to gather."

So this was meant simply for info gathering guess that explains she was spying on Yuuma actually and not keeping track of Issei."

"You seem rather calm with all of this suddenly." Rias delivered in a calm tone, but her eyes glinted with suspicion.

"Well it's not every day you figure out the neighbor you had is not only some supernatural entity but that you were killed by her. How do you think anyone would feel?" I countered.

"That and I already was curious about the supernatural and mythology as a whole so the idea of literal devils, angels, and other entities among us is not some uncommon field to humans." I also answered trying to be as diplomatic as possible.

"Besides when I arrived in Kuoh I remember some people talking some really strange things going on in town." I continued.

"Such as?" Rias inquired. Something that sounds believable… come on… I think I know one.

"When I first got to my building I remember the landlady telling me story of how some homeless people have been unfortunately disappearing at an alarming rate with no bodies so far to identify any possible victims. That was just one of them." I explained and the group looked at each other with worry on their faces.

"Sounds like a stray devil, perhaps Rias?" Akeno brought up the point. "Possibly but were off-topic now. So back to introductions."

"Ryuichi, Issei I want to officially welcome you two as the new servants to the house of Rias Gremory, daughter of the Marquis of Gremory. From this day forward you will be not only my servants but as a family to me. For that's how we treat our servants." Rias explained as everyone unfurled their wings.

After seeing everyone else, suddenly our own wings popped out, and to say the truth the feeling was weird I was like something was there, but it wasn't. I used my hand to feel the wings themselves and felt the leathery texture they had.

"Now then, will you two swear your utmost loyalty to me and see me as your master. Do you accept?" She said with a serious look but a kind smile on her face.

At first, Issei looked torn but after another quick look at Rias and the other girls, he came in with a resolute yes. I other hand wanted to know something, and this was the only way to do it.

"As it matters to me it's doesn't matter what household you come from Gremory or not, I wish to know only one thing will you Rias Gremory of your own person, not the noble daughter of a family truly promise to treat your servants will kindness?"

For once the room went quiet and the original ORC all looked at me with sharpened stares it didn't matter I wanted to know the answer… I had to.

At first, she was caught off-guard but then she returned a smile and replied, "I Rias, swear upon my own name to treat you kindly and grant your desires. Does this mean you accept, Ryuichi?" She asked me in return.

I returned the smile as I then bowed to her and replied, "Yes, my lady" She was taken aback by my calling of her and I thought I could see a little blush adorn her cheeks.

But back to business, the talk of Sacred Gears came up and how Issei was killed for his power and I was initially killed for interfering but when she told me something else I was amazed…

"Wait, are you saying I have a Sacred Gear?!" I said in shock. Rias then answered, "Yes, I confirmed Issei's by Raynare's actions, and when I resurrected you it some significant demonic power to revive you, so for such a thing that meant you were also carrying a…"

I finished for her, "…Sacred Gear" All I could do was stare at my hands as the doubt began to fill my mind but as they say; no pain, no gain.

As I began to focus on my hands, for some reason that voice I've been hearing came back to me and I could hear it scream out, "You must rise up once more and take the sword and bring light to this land for a darkness approaches and only the light of that blade will illuminate the way!"

Suddenly a furious wind rocked the club as everyone braced themselves as I opened my hands I looked in them to see them holding something in the shape of a sword, but no sword was in my hands.

What I did see was something I would know at first glance; that blue wind, the power behind it, and this feeling behind it as well. The spirit of Pendragon.

This was the Invisible Air of the Wind King, one of the seals of Excalibur Proto…

This was not a normal Sacred Gear; this was something else. This was how I began my journey as the heir to the Kingdom of Camelot.

AN#1 – Welcome to my new Fate/stay x High School DxD crossover story; High School DxD: Heir of Camelot, where our hero Ryuichi Naruse is brought to the DxD world by a mysterious force and finds himself in a story he never expected to be in.

Join him and his allies as he fights across mythologies and heroes galore in this new story.

AN#1.5 – In this story Ryuichi will be taking Issei's place as the main character and love interest to many of the girls but that doesn't mean Issei will be left out of the picture, both of the boys have their own harems. So don't worry on that front.

*Had to make a few edits here and there for grammar and structure. Also updated Ryuichi's harem as well.*

AN#2 – I want to give a shout out to some of the authors and stories that are the ones that inspired me to make this one myself.

TalonAlpha3, Stream98, and CowboyAlchemist. I ask that you also follow and read their DxD stories too.

AN#3 – Remember I wouldn't be here without you guys! Remember to Favorite, Follow and Review! :)

Harems

Ryuichi's Harem: Rias, Akeno, Koneko, Kuroka, Venelana Gremory, Aika Kiryuu, Isabella, Karlamine, Kiyome Abe, Serafall Leviathan, Sona Sitri, Tsubasa Yura, Xuelan, Le Fay Pendragon, Xenovia, Rossweisse, Lint Sellzen (New!)

Issei's Harem: Asia, Irina, Ingvild Leviathan, Ravel, Yasaka, Kunou