This fic is based on my other fic 'the chronicle of Ultimate familiar' with instead of a multi-crossover it will focus solely on High school DxD. And if you think Saito on that fic is already powerful than this one is even more powerful at the beginning than all of other Saito from my other fic.

As usual my grammar isn't good in fact I won't be offend if someone say it suck because it really is. I hope you can stand the horrible grammar and if someone who is interested on Beta this fic please let me know.

Although the beginning may look the same but I will change it to fit the plot.

Disclaimer: I don't own Zero no Tsukaima and High School DxD.

(Saito P.O.V)

This is it! The final battle that will defend the fate of Halkeginia and Earth are upon us. No matter what, defeat is not an option!

With a shrill cry the demon... or more correctly to say a mass of big shadow in front of us was letting out a cry that shook the land itself.

Beside me is Julio. I wouldn't go so far as to say he is my friend, but right now both of us has the same goal, to defeat that thing once and for all.

Behind us is four human figure and behind them is a large army of Human ,Elf, spirit of the land and even the Vampire race itself showing to the final battle that will decide the fate of the whole world.

All of the mage, and any creature that capable of using firstborn magic start to chant a spell as magic wqas throw at the big shadow. Fireball, lightning, wind, water, ice, earth, Each different element form as it attacks the big shadow.

The big shadow didn't let up as it send some kind of shadow army of it own but both me and Julio wont let them past as I cut them one by one while Julio was using some kind of magical artifact as he destroy them, not letting any of them pass. With the help from other creature that under his control Ogre, Orc, Dragon and many more fantasy like creature the shadow army got obliterated by both of us.

Finally the four human or more correctly to say Void mage user finished up their chanting as the item surrounding them including the ring that their wear start to shine.

Vittorio with a ruby of fire.

Yossete with a ruby of earth.

Tiffania with a ruby of wind.

And finally Is Louise, wearing a ruby of water.

Circling around them is four void item.

Now the condition is complete.

Four void item and ring.

Four familiar.

Four void user.

When all of it gathers Brimir true void will awaken.

A bright light engulfed the creature as it got push away behind as a void appear out of nowhere swallowing him. Soon the Big shadow got completely swallow by the void as nothing were left of him.

It over. I would have said that but there is something else that need to be done. I turn around as Vitorio, Yossete, Tiffania and Louise walk at me. Julio watch from beside me as he wait for them to get near us.

"There is one more thing that need to be done, are you ready?" Vittorio spoke up.

I know there is no way but to do this, but I really don't want to do this.

"I'm ready." I force myself to said that as I nod.

"Saito…" Louise said as I watch her sad face.

"Louise…" I don't know what else to say in this situation. After this we may not be able to see each other anymore.

Louise lean her body closer as her face got closer to mine. I did the same as both of us share the kiss that could be said our last kiss.

She released the kiss reluctantly as I can see she force herself to smile.

"Are you sure you want to go like this? I can erase your memories if it too painful?"

"Thank you for your concern but I rather keep my memories of this place."

I reject Tiffa offer. I knew she didn't have any bad intention. Even if it painful I still want to keep all the memories of Halkeginia on me. This place had changed me to the person I'm currently is.

"Then, I will open the gate now." As Vittorio said that he chant something as a window made of light appear. On the other side show the place of my birth. Japan that is located on Earth. "Tiffania if you please…" Vittorio make a gesture for Tiffa to continue.

With a nod Tiffa came in front as she chant something. All of the void item and ring start to glow as all of them floating on the sky as it make a circle above us. Julio familiar mark also starts to glow as it shot to the sky and got absorb by the item. What had been a familiar mark were no longer there meaning that Julio no longer posses Windalfr and Myoznitnirn.

The same thing also happen to Void mage as their body giving out a soothing light as it shot up like Julio is. Soon the void item and ring start to disintegrated as slowly they remain being absorb by my own body. I start to feel pain on my right hand and my forehead as the rune being engraved in it. I also can feel a surge of power entering me. all I can do now is endure the pain.

"Guh…" I greet my teeth as I wait for the rune to be engraved fully.

"It's done. Now all that left is for you to go through world gate. But remember, once you gone through there, there won't be any other way to connect your world to Halkeginia meaning you won't be able to return."

I knew that without being told. That creature was born as a result of Void existence. 6000 years ago after Brimir dead he had sealed the Void as to not let that creature to awaken. Since we don't know how Brimir sealed it in the first place we can only use the alternative.

Everything about Void will be transfer to me, the person who came from aniother world. After that I will return back to my world making Void non-existence in Halkeginia. With this the creature wont be ale to revive itself because the Void is no longer exist in Halkeginia. That also mean that I could never return here since there will be no one capable of using World gate.

"Partner, it's time to leave." Derf said.

"Are you sure Derf, living the land of your birth?" Derf seem to insist of following me back to my world.

"I won't leave partner side as long as I'm exist."

Was Derf answer. I'm happy to hear that but carrying a sword in modern Japan wasn't really a good thing either.

I walk step by step as I finally arrived right in front of the portal.

With a single step one of my feet already gone inside the portal. I stop for a bit as turn to look at everyone. Many memories flash through my mind starting from being first summon by Louise. Many thing happen here that I don't know if it can happen when I'm on earth.

"Goodbye… Everyone, Goodbye Louise." As I said this, my other feet move as I enter through the portal. I turn back as I look at Louise one more time. she was crying but she still force herself to smile at sending me home.

her mouth move as if saying something but at this distance I wont be able to hear it. even so I still understand what is it she want to say as I replied.

"I love you to…" with that the portal completely close cutting all of the connection with Halkeginia.

"I'm back…" I mutter to no one as I look up at the one moon floating on the sky.

XXXXXXXXXXXXX

Now that I'm back on Earth I need to know where I am first before finding a way back.

Currently, I'm in a rooftop of a Building. When I look down I can see a track field and other building on the ground. With this I conclude I was in some sort of school. But which school it is, is something I need to found out for myself.

Since it was night, there will be no one here at school so searching for a person to seek answer is useless. There always the guard if the school employed one on night duties but that will leave me to explain why am i doing at a school not of my own in the middle of the night. Maybe there will be the name of the school at the front gate?

With that thought in my mind I search for what seem to be similar to front gate as I finally spot one.

"I cant see anything from here…"

It was true. The tree is blocking my view to see what is it. Not to mention it was dark making it harder to see. I was tempted to just jump down from this height. I'm sure with Gandalfr I could survive this kind of fall but it better if I don't take any risk.

What would my mother said if I return home with a broken body part?

I head to the door that led me to the inside of the building. It take time as my eye finally gotten use to the dark as I explore the place.

For a school, this Hallway is kind of complicated. I have a feeling that I've been wondering in circle while searching for a stairs to go down.

Hm… maybe I should just jump down from this floor since this is a little lower than the floor from before. I'm sure I could survive the fall easily.

That could work if not for the fact that all the window here are locked. I don't want to break it just because I want to go down.

Hm… Maybe one of the windows in one of this room is left open? If that the case I should search at one of the room.

Oh! What luck! there is a big door in front of me. There seem to be something written at the sign above the door but I can't read it withn this darkness.

Without any thought I open the door who happen isn't lock. There's no way anyone would be here at this kind of hour so I casually walk inside the room.

It was easier to see what inside the room as the light from the moon reaching here lighting the room. There is a table or something there and like I thought the window were wide open meaning I could jump out from the building.

I would done so if not for one thing. In front of me there is a girl. More correctly there is a half naked girl who in a middle of changing clothes.

Both of our eyes met as she was stun for a moment. So am I. Now what to do?

Who is that girl? Why is she changing clothes in a school building in a middle of the night?

This question keeps running on my mind.

"Ahem…"

On hearing that I finally snap out of my thought as I turned around immediately.

"S-sorry… it wasn't on purpose!" I don't know if she would believe me but I can hear her finishing what she were doing just now. The sound of her changing close really turns my imagination on as my mind start to imagine how she look like.

Nononono… Now's not the time to think about this. What If she called a cop? I don't want my parent to come and met me in a police station after being gone for a whole year- wait come to think of it that made more sense being on police station though if the reason I was there because of being sexual offender I don't think I want that.

"You can turn around now."

I did what she said as I look at her in a school uniform. I never seen those uniform before so this place might be far away from my home.

"…"

"…"

Damn it. What should I say? I never expected there will be a person at this kind of time. What were she doing here anyway? Don't tell me she lives here?

"So… who are you and why are you here at this kind of time. You're not even a student here aren't you?"

Now it is time to make some story. I can't just tell her 'I was teleported here'. There's no way she'll believe me. In fact she might think me as crazy person.

"I-i'm... lost?" gah! there no way she believe me if I said it with a question mark. On second thought, what kind of excuse is that? Even if I said it right it still doesn't make it more believable.

"I see, so you don't intend to tell me, if that the case!"

"…"

"…"

"…What?"

I tilt my head in confusion. What did she want to do? So far nothing had happen after she finish saying that.

"T-that didn't work? What are you?" Her tone suddenly changed to a more wary tone.

What did she mean by what am I? oh right, I haven't introduce myself yet that's why she was a bit surprised.

"Sorry, I forgot to introduced myself, my name is Hiraga Saito. That is who I am." Since I just intrude on her changing it would be rude to just escaped without giving my name… crap! I just give her my name. even if I escaped she can still report to the police about Sexual Harassment. How could I forget about that…

"Now, just forget about me and I'll just be on my way…"

Just when I were about to make my escape the door closed with a loud "Bam" as it tried very hard to open it. How is this possible? The door just close on it own and lock itself? Could the technology have advance this far during a year of my disappearance?

It could be possible since anything could happen within one year.

"Don't think of escaping, the fact that Hypnotism didn't work on you prove that you're not a normal human."

Now she starting to said something that was hard to understand. Hypnotism? Normal human? I know that part about Hypnotism but what did she meant by normal human? Could technology had gone far that they can even create an android or something like that?

"Um… I'm kinda in out of loop for a year so I appreciate it if you explain what do you mean by that?"

Its better to admit if you didn't know something and ask someone else.

She seem to not expected my answer as she were about to fall to the floor but managed to regain her balance.

"Wha- are you really saying you don't know what I'm saying?"

"Nope! That's why I want you to explain thing."

"If so why are you here? Are you a thief coming to school late at night?"

She sure love asking question huh? Well if that the case she should answer some of my question.

"What about you? It's weird for a student to still be at school at this kind of time. I'm not the only one that needs to explain thing here."

Now, how would she react? It was weird for a student to be at school this late at night unless the study time had been changed to night time which I doubt is the case here.

"Sigh… this is going nowhere, let sit down first while were talk about your circumstances." She said as she click her finger as the light on the room suddenly turn on.

I would be amazed by this if not for the fact that on Halkeginia they apparently turn the light on and off using this way. But there no magic in this world right? So technology had managed to recreated something that magic did which is amazing in its own way.

XXXXXXXXXX

And so both of us sit at the table who look like a an office Table. The girl sat in front of me as I sat the opposite of her.

"Hm… why are we doing this again? All I want is to find where I am and return to my home." I said to her. It shouldn't be a problem for her to just tell me where am I so I could go straight home and have a wonderful reunion with my family. Yet… she stood there not wanting to let me go.

Let see… the window behind her is wide open meaning I could escaped from here If I just jump through it. But what would she think after seeing a person jump off from the third floor of building uninjured?

"No, I can't let you go just yet before you tell me who you really are?"

This girl start to get on my nerves.

"Like I said my name is Hiraga Saito, if you can't remember that than you can call me Saito for short!"

I did tell her my name before. Come to think of it she didn't tell me her name at all and not to mention why she were here in the first place.

"I tell mine but who are you? Why are you here in the first place?"

The girl look at me for a moment before giving out her name.

"My name is Sona Sitri the sister of Serafall Leviathan and the student council president of this school."

The girl or should I said Souna introduce herself. The weird thing is she even introduces her sister as well. She seem to look at me when she mention her sister name as if probing some sort of reaction from me.

"Student council president? Oh... I see that why you were here?" If she were the president than it wouldn't be weird if she were here late at night.

Most of the Student council president type is always stay late at school sorting some work. At least that what it always is on anime.

"…"

"…"

She seems to be waiting for another reaction from me.

"Is there something I should have noticed?"

I know I'm not that smart, but what did she expect from me?

"You really clueless aren't you?"

"Like I said I don't even know where I am? If you would be so kind to answer my question…"

Let just get this over with so I could find my way home. But considering I'm in a place unknown to me I may need to wait for tomorrow morning before going home. Maybe I could contact my parent to bring me home.

"All right, I let you off for the time being. This is Kuou private academy. your currently in Tokyo." Eh? Tokyo? what luck that the region I'm in is the same as my house is.

"Thank you very much for telling me. I'll be on my way then…"

As I said that I stand up from the seat as I head out to the entrance door.

"Wait!"

I stopped walking as I turned around with a question mark on my head.

"Before that…."

"What?"

She just trailed of before saying anything.

With "BASHA" sound something sprouts out from her back.

"AH!" I unconsciously step back as I reach out for the stone tablet that had store all my weapon as I summon Derf in my hand out of reflex.

"Wha- what the hell are you!" I found myself asking that while my hand Grip Derf tightly preparing for something worse.

"Hm… just as I expected. You are not normal human and yet you seem didn't know anything about us."

She said as I can see her eye behind her glasses analyzed me thoroughly.

"Derf, do you know anything about the creature?" I should have return to my world and yet in front of me is a creature that shouldn't exist on my world? Is this even my world in the first place?

"I'm not sure. I can sense magic inside her but I never seen any creature like that before." If Derf didn't know then we're definitely not anywhere near Halkeginia.

"A talking sword? is it a sacred gear that has something sealed on it or something else?"

I'm not sure what is it she muttering about but I think maybe it better if I take my leave now. Just as I expected the door were locked meaning that I cant escaped using the front door. If that the case…

"Oooooohhhhhhhhhhhh…"

I charged at her as she seem to be a bit startled by my action. This gave me an opportunities as I ran past her through the window as I jumped from the third floor.

With the "thud" sound I land on the ground. Just when I was about to head to an exit….

"Where do you think you're going?"

Souna had already stood in front of me.

"When did she!?"

I look back at the room from before and she isn't there anymore. Just how did she get in front of me so fast?

"Guess I got no choice… I don't really want to fight with woman but if you didn't want to let go off me than I have to force my way through…" I said clearly.

Please let me go and forget ever meeting me. I silently pray on my mind.

"Very well, let see how strong you really is."

No choice then. Maybe if I beat her she let me go? There's no need to kill her here. Even though she have the wing on her back it still make it hard for me to kill something that look like human. It make me wonder how I survive in Halkeginia for a whole year without killing even a single life.

She brought her hand as magic circle appear. Soon a gush of water come flying at me at high speed.

My reactions were immediate as I raised Derf to block the attack. The water magic hit Derf and like all other magic on Halkeginia it got absorbed by it.

"I don't know what happened partner but for some reason I can absorb more magic than I'm usually could." Derf said after he got a taste of the water magic.

If what he said is true than I could fight without worried that I absorb to much magic that will cause him to break apart. After being inside the Katana thing happened and Derf got broken again. Since at that time we already got an Elf Corporation one of the Elf best blacksmith create a new body for Derf. Although I said new, the sword is like a replica of Derf Original body so there really nothing much different from it.

I use this chance to charge at Souna but before I got near her she use some sort of magic as she maintain her distance from me. Another chant but this time a magic circle appear above my head as a spear of water raining down on me. Even with Derf absorb ability I can't absorb all of the magic at once. She must also think the same thing. That's why she chose this kind of attack. To be able to deduce Derf ability and weakness just by watching it once this girl must be some sort of tactical genius.

The spear hit me. The attack wasn't fatal but it still hurt as each of it hit my body.

"Guh…" I fall to the ground as I try to withstood the pain from the attack.

"Zwoosh" a wall of water suddenly raised round me making me unable to move anywhere aside in frnt of me which happen to be where Souna is.

"Give up?" Souna said as she came near me.

Can't believe I just lose. No… it still too early… I still haven't use those two rune yet.

"Not yet!" I shout as I charged at her as I reached out a weapon from the stone tablet.

With a "thung" sound I drop the item as I kept charging at Souna.

I heard the "Flash" sound as Souna suddenly cover her eye from the effect of the flash bang. It was a wonder that I found something like this near a shaitan gate. From the look of it, it seem to be made not too long ago.

Now all I need to do is hit her with the back of the blade to knock her out.

"Guh…" she wave her hand in front as another gush of water came charging at me. But the attack miss as it just past on my right. She can't aim her magic if she can't see, so before she regain her sight back I better take this chance.

"This is-" it—I were about to say that but suddenly something seem to caught my feet as I stumble to Souna direction.

"Crash! Boom!" you can practically heard this sound.

XXXXXXXXXXX

What happened? Souna though to herself. She were fighting with an unknown individual. Just as she thought she had corner him that guy drop some sort of grenade that blind her eye. She never expecting for him to use human weapon on her so she were caught off guard.

Suddenly she can feel something had tackled her as she fall to the ground.

She can feel something touch her lips but she cant be sure of what it is. The effect from the grenade had lessen as she finally see what going on. To her shock when she can finally see the boy eye were right in front of her. His eyes were wide and so were she as she didn't expected this turn of event.

Her lips had met the boy lip as they were both kissing on the ground. She can feel her face redden a bit but not before she heard a sound.

"Thou hath been chosen by the Chaos, accept thy Destiny as thou accept thy role as master of Chaos."

She really didn't know what the voice meant but she can see some sort of magic circle she never seen before appear as it start become smaller and smaller and soon the magic circle shoot to her chest as it engraved fully in the middle of her Breast.

"What just happen?" She said out loud before finding her consciousness gone as everything gone black.

XXXXXXXXXXXX

Ok… even I still trying to make sense what just happen. she were indeed unconscious but not with the method I thought she would. I were planning to knock her out with a simple strike from Derf but my feet got caught on something on the ground as I accidentally stumble upon her as I tackle her to the ground.

If that was the case I wouldn't think to much about it but the fact that our lip accidentally met each other as if we were kissing. If Louise were to know this I'm dead for sure. Oh.. right… there no way to return back to Halkeginia now.

But something weird happen during the kiss. A weird magic circle appear and suddenly it start to be engraved right in the middle of her chest. of all the place why there? I would go and check if it were other accessible place but to check the mark I have to strip her. I already caused that misunderstanding from before so there no way I would do that again.

Seeing that she was unconscious I decide to move her to a more comfortable place before I take my leave from this place.

XXXXXXXXXXXX

Finally I arrived at home. I was wondering how I should make my call but I accidentally found a police station. From there they start to call my parent. I was nervous at first but after talking with my parent it finally prove it that this is indeed my world. Even so what with that girl with a black wing? Could it be that Earth is not as normal as I thought at first?

About half an hour later both my father and mother arrive to pick me up. Needless to say while on the car they keep asking me where I had gone to? All I said was "I explain later." Something like crossing world should be explain when I return home.

We arrive at our home as all of us gather at the living room.

I use a simple direct approach. I summoned Derf, and my father almost faint at seeing a talking sword. My mother doesn't seem to faze at much. She said that she had received my mail and said she believe all of it. That mail that I send to her, I never though she will believe me but I felt a bit relief.

From there I explain everything about Halkeginia. It mostly Derf who did the explanation but I did interrupt him once in a while.

"That is the case… my business there is finish and I have return." I said as I finish the story.

"Ahem… I never believe the story like that if not for the talking sword there. But still we both glad that you're okay and still alive." My father said though he still trying to get use to the idea of a fantasy like world. Maybe it would be better if I kept about the supernatural thing like that girl in I met before.

Sigh…. Finally I'm back. to a place where that I can call my true home. Now that I'm back I suddenly feel sleepy. Maybe it a relief or the adrenaline from the battle had worn off? Who can say, but It would be great t just fell asleep right now. I thought as I can feel my conscious slowly drift off as everything were gone.

XXXXXXXXXXXX

It had been a week after the battle with that mysterious boy. She haven't told anyone about it since she feel that the she didn't feel any ill intent from the boy. But one thing she was confused about were a mark on her chest. She had study many kind of magic circle but none of them look the same as the mark on her chest, not to mention that she can't get rid of it and she can't tell her sister about it either. Who know what her sister will do if she knew someone put a weird mark on her body. She may end up destroying this whole country.

"All right class, today we have a new transfer student." The teacher said. Souna look up as she watched the newcomer came in. Her eye widen and so were the person as they eyes met.

The Transfer student seems to don't know what to do but he managed to gain his grip as he start his introduction.

"Um… my name is Hiraga Saito. Nice to meet you."

Like I said before I will write another crossover with HSdxd but without the multi-xover part. This story will be different from 'The chronicle of Ultimate familiar'. For one reason is that this isn't an Au universe meaning this is Saito world. Although some abilities may still be the same but Saito in this is much more stronger than his other counterpart of my fic at the start of the series. Of course he will get a power up as the story goes to. But considering the power level of Dxd Character I don't think he can survive with just Gandalfr rune. Lifdrasir rune were as good as useless since it can end his life.

I think that enough for now and why don't you tell me whether this story is good or not. I know the grammar suck but please bear with it until I found a Beta reader who willing to Beta this story. and please review.