Author's note: Hello everyone, this is my first ever fanfiction. As you can see, I decided to write a crossover of FSN / Familiar of Zero. And in the beginning, it's basically the same as the canon of FoZ, but I already planned to take diversion later into the story, while the peronality of the characters involved is almost the same as canon, and the big events are preserved, you will eventually see new events and scenes as well.

Please enjoy the story, and give me your review. And on a final note, I based this fic on the Light novel verson of Zero no Tsukaima, not the anime. And Shirou is from UBW route True end.

**Story begins**

I was falling through a thick darkness. What's going on here? Just seconds ago I was still fighting for my life against the Enforcers of the Mage's Association. And just as I was retreating, I saw it: in the middle of the clearing, something was there, it was like a glowing large ellipse.

"What is that?" I wondered. It really got my curiousity. Despite having a dozen of Enforcers chasing me, I reached out, and finally touched the object. And all of a sudden, it happended:

"What the...!" Before I managed to finish my sentence. The strange object sucked me in, and here I am, surrounded by complete darkness, not understand what the hell is happening here. Luckily, after spending a God-knows-how-long time in that abyss, I saw the exit: Another glowing ellipse just like the one before. With a hope of ending this crazy situation, I reached out for the strange object...

"Eepp..!"

"Again? Louise?"

"Another failure?"

Strange, I heard a lot of voices around me, but couldn't figure out what is it they are saying. Starting to regain my senses, I could see that I was in a kneeling position. I opened my eyes to check the surrounding, as my hands ready to trace Kenshou and Bakuya in case of suprise attacks.

And I saw in front of me stood a girl with reddish-brown eyes, white skin and strawberry blonde hair. Is she a foreinger? That must be it. And now that I get a good look at her face, she's pretty cute..

The girl was looking at me, and her eyes opened wide in shock of my appearance.

"Who are you, commoner?" Asked the girl.

Commoner? What does that mean? I'm really confused now, have no idea of what they are talking about, but it seemed like there wouldn't be any ambush or suprise attack, I lowered my hands and turn my eyes to look around.

There are a lot of people surrounding me, looking at me in suprise and wishpering among themselves. They are all young, about my age or younger, and they all seemed to wear some sort of strange uniform. Is this a school or something?

"I ask you again, who are you, commoner?" The girl repeated.

"I'm Emiya Shirou. And what is this "commoner" thing?" I turned back to her and answered, stood up as I did so. The girl seemed to be suprised of my actual height, as she took a step back. It's understandable, seeing how she only stands up to my chest.

"Oi, Louise, what are you doing? Bringing a commoner to the Summoning Ritual?"

Someone from the crowd around us shouted, and laughters started to erupt. Everyone, except for the girl in front of me, Louise is her name it seems, was laughing.

"I...I just made a little mistke!" Louise shouted back, her face is turning red by either anger or embrassment, or maybe both.

"What mistake? It's just like you to summoned a commoner as your familiar, you are Louise the Zero afterall."

Summon? Don't you mean that I was summoned here? By that girl? I'm getting more and more confused.

"Mr. Colbert! Please me try the summoning ritual again?"

And here come a middle-aged man, dressed just like a traditional magus, black robe together with a wooden staff. He calmly said to the furious Louise:

"I cannot allow that, Miss Vallière."

"Why not?"

"It is strictly forbidden. When you are promoted to a second year student, you must summon a familiar, which is what you just did. This is a tradition, Miss Vallière. I cannot allow any exceptions."

"But...but a commoner as a...a familiar..."

Ahhh... I think I got it, no, actually I still haven't got it, but at least I can figure out what's happening here. I'm not unfamiliar with summoning ritual afterall, not after that night...

That night, a swordwoman appeared in front of me, in my usual shed, when I was fighting Lancer...

But what I don't understand here is, why was I summoned? I'm not a Heroic Spirit. Heck, I'm not even a spirit, I'm sure that I was still alive and well before getting here. But...I'm here now afterall, and that girl over there is very likely my Master, which I'm not really happy about, since she doesn't really seem to like it very much when she summoned me. Ouch, that's kind of hurt, considering this is my first time being a Servant, and I has already displeased my Master even before we get in a proper contract.

Still...

"I, Emiya Shirou, ask of you. Are you my Master?" I got close to her, resumed my knelling position again, and somewhat repeated the question that I heard a long time ago.

"Ehh...What?..." Louise suprised at my action.

"I ask of you. Are you my Master?" I repeated.

"And...and who do you think you are, asking me with that tone?" She frowned.

Paused. And after awhile, still red all over her face, she seemed to come to a conclusion that there's no other way, and started talking again:

"My name is Louise Françoise Le Blanc de La Vallière. Pentagon of the Five Elemental Powers; bless this humble being and make him my familiar."

"Very well, Master...Eh?"

Just as I finished my sentence, I saw her face drew closer to mine.

"Eh? Master... What are you..." My eyes opened wide in suprise, so much that I couldn't even make a proper question.

"Shut up and stay still." Louise ordered, and her lips pressed against mine. Instantly, I felt a flow of od running through my magic circuits.

What the hell's wrong with today, I got summoned to a unfamiliar place, being treated like a "commoner", whatever that is, I have a feeling that it's not very good. And finally this...

But on a second thought, this might not be so bad...considering how the Enforcers were chasing me intensely moments ago, with no hope of escaping...

And beside, her lips felt nice too, they are warm, and soft. This sensetaion alone made me feel like...

No, stop that thought! I told myself. If Rin ever found out about this, I'm finished for sure.

As I make a note inside my head to make sure that Rin will never ever know about this little secret, her lips parted. "It's done."

Our face drew apart, and I could see her face burning up, even redder than before. Is she embarsases? It's... so cute. Just looking at her I can feel my face getting hotter too.

Aside that, I can still feel the od running in my body, my back, my chest, arm, and finally my right hand. There, it started burning up. "Ouch!" Literally, it burned through my skin, glow brightly, and settled down. When I looked at my hand to check, I could see some kind of unfamiliar Runes.

"Hey, what the hell is..." I started to speak, but no one seemed to care about me at all.

"Allright, class dismiss." Said the middle-aged magus. He turned around and started to rise in the air. What? Is he flying? Now this is some interesting thing that got my attention. I looked around only to see that the other students had started flying away as well.

In the end, the only ones who were still staying at the courtyard, were me and Louise, my Master. I stood up again, and followed her as she started to walk away.

"Why don't you just fly like the others, Master?" I couldn't help but voice my curiousity.

She turned back, gave me a sharp glare, blushed a little, and snapped "I...I just don't like it, okay? And just who exactly are you? Where are you from?"

"As I said before, I'm Emiya Shirou, if what I believe is true, then it was you who summoned me here, and made a contract with me. Therefore, you are my Master" I calmly answer her "As for where I came from, I was in London, England before I came here. But my home country is Japan."

"London? England? Japan? Never heard of them"

"Wha... Then where are we now?"

"Tristain, and this is Tristain Academy of Magic"

"Academy of Magic...I see, that's why you guys can fly and all... and I guessed it must be some kind of school since i saw the uniform..." I mumbled.

"I'm a second year student, Louise de La Vallière. I am your master from now on. Remember that!"

"Yes, Master."

"At least he knows manner." She sighed heavily "But why do I got a commoner as a familiar..."

That term again, some how the sound of that really annoys me as I found myself raised my voice a bit "Firstly, I'm not a familiar, I'm a Servant. And what the hell is a "commoner" anyway?"

"Is that how a familiar supposed to talk to his master? And right after I just complimented you." She snapped at me, and then sighed again "I've always wanted a Dragon or a Griffin..."

"Dragon and Griffin? They still exist?" I asked, couldn't hide my suprise at all, now this again, is something new here.

"Of couse they do, and they would make a totally cool familiar too..."

"Hmm... Interesting, they ceased to exist a long time ago from my homeland" I mumbled, and started to think, maybe I could actually stay here to avoid the Clock Tower, since there is hardly any connection between this place and mine, I think I can be safe from them here. Beside, this place has a lot of interesting things... And most importantly, I was summoned here, and got a Master, I took another glance at the girl in front of me as I think so.

"Is that so?" Louise said, I could sense some pity in her voice, but choosed to ignore it and stayed silent. My Master choosed to do the same, and so not one word was exchanged between us until...

"So you are saying you came from another world?" Asked Louise with an expression of disbelief when we finally got back to her room in the evening, both drinking the tea that I prepared. It's about 12 tatami mats in size Western style room. Not my style to be hosnest, I generally prefer Japanese style house with a large kitchen and a large yard. Well I guess I shouldn't complain, seeing this place is at least a lot larger than the dorm room that I and Rin stayed in together at the Clock Tower. But despite the confined living space, that one year was really the best time of my life. With me as her Apprentice and lover, I practiced my magecraft, trained my swordmanship, helped with her researches and well...some of the private activities that for the sake of privacy, I will just refer them as "prana exchange sessions". Ah, just think of them is enough to make me a bit excited... But right then, the truth hit me...

...That's how it was before we broke up...

It really hit me hard, since that event only happened this morning... I could feel my eyes tearing up, but held myself back, there's nothing good come out of crying now... This is for the best, I though.

Rin... I wonder what she's doing...

"Shirou, are you alright?" Louise's voice pulled me back into reality. I looked up and found out that she's looking at me worrying. Oh crap, I must have let my earlier thoughts of Rin shows on my face.

"It's ok. I'm fine" I told her with a reassuring smile.

Not completly believe me, but decided to let it slide, with a "Hmp", she resumed what we were talking about "As I was asking, are you really come from another world?"

"Yes, that's my best guess at the moment. No, it's more like I'm sure of it, since you haven't even heard of my homeland, as well as the fact I didn't even know that a country named Tristain exists before, I think it's safe to assume that we come from 2 different worlds." I concluded.

"I see...But still, it's unbelievable." Louise frowned.

"I know, I have trouble believing too, but it's the most logical explaination we have right now."

Silence...

"Well it's getting late, I'm going to bed" Louise decided after awhile. As she said so, my Master walked toward the bed, and by the love of God, started to unbutton her shirt.

"Ugh... What are you doing, Master?" I asked, feeling my temperature rising as I turned my head away.

"Isn't it obvious? I'm going to bed, so I'm getting changed" She stated casually.

"I know that, but..."

"What?"

"But why here? At least do it somewhere I can't see you"

"And why is that?" Louise snaps, starting to lose her temperature again. Oh God, does she have any nudity taboo at all?

"Because it's awkward, I'm a guy afterall you see?" I said, still kept my head turned away from the view of white skin appearing before me as she stripping even more.

"A guy? Who? You are just my familiar, and I don't need to care about being seen by my familiar, no?"

"Again, I'm not a fami...Eh?"

Before I finished my correction, I saw a piece of cloth got thrown at me, and then one more, and one more. After taking a look at them, I realised that those are Louise's shirt, skirt, and, forgive me God, I think I called your name too many times just in one evening, the last piece is her panty.

"Wash them clean by tomorrow" Louise ordered me after getting into bed, the blanket covered her body. I relaxed a bit, at least I could look straight ahead now. But wait what? Did she just ask a Servant to do her laundry? I mean really? That's even more unbelievable than the fact that we may come from two different worlds. I opened my mouth, ready to voice my objection, but on a second thought...

"Yes, Master" I answered obediently.

No respond. So I just keep asking.

"By the way Master, where am I suppose to sleep?"

"Over there" She said, pointed her finger to where my bed is. After looking at it, I really think call it a "bed" is exaggerating, because it's just a lump of straw put together into what I would call a "nest" at best.

Gave myself a bitter smile, but decided not to complain, I simply said:

"Very well, Master. So I will go and take care of the laudry now."

No respond again, but took that silence as a "Yes", I left the room, quitely close the door behind me. All the while thinking to myself "Lucky for her to have summoned me, just imagine she got Gilgamesh, and then ordered him to do her laundry..." Just the thought of it is enough to scare me, but somehow it's hillarious in its own way.

As her familiar leaves, the door closed behind him, Louise still laying there, wide awake. She just can't sleep at the moment, afterall, a lot happened today.

"I failed again." She though "I summoned a human, a commoner as my familiar."

And that thought make her really uncomfortable, really angry, but at the same time, really sad and disappointed...

"Maybe the title "Louise the Zero" really suits me afterall..."

With that sad thought, she fell asleep.

As I made my trip to do the laundry for my little Master, I found my way back to the courtyard, because if my memory didn't fail me, then there's a laundry area there somewhere. I tried to gather my thoughts together as I walk.

So...I was summoned here, it was so sudden, I didn't prepare for this at all. As for why was I here, hosnestly, I have no idea. Is there a Grail War here? That's uncertain, but not impossible at all. Because as far as my experience go, you can only summon Servants for that kind of event.

But then again, something must be wrong here. First of all, I'm not a Heroic Spirit, not the Counter Guardian EMIYA, I'm Emiya Shirou, still alive and kicking. And even that aside, the Summoning Ritual itself has to be wrong somewhere. As I've been told before by no one other than Saber, that after being summoned, the Servant would receive enough knowledge in order for them to survive the era and place that they were summoned in. But it's not like that in my case, I received nothing, not a single detail about this world...

With that thought, I glanced around. Wherever or whatever this world is, it's still very under developed, no electricity device, not even a light bulb, heck, I doubt they even have electricity here...

I let out a big sigh.

Another question came up that I'm not able to answer: "Which class of Servant am I?" I also received none of the information regarding that matter. If I were to guess myself, then I should be either Saber or Archer, based on my skills. But what if I'm something else? I don't have a lance, but I actually can trace them with my magecraft, so Lancer is possible, and I can't be Rider nor Caster. So Assassin? That's a possibility too...

At least, I tell myself, I could be sure that there's no way in hell I'm a Berserker, just the fact that I didn't slaughter everyone except my Master at the Summoning Ritual should be enough proof for that. I found myself sigh in relief at that thought.

So many unanswered questions made my head hurt a bit.

Finally I reached the courtyard, and located the laundry area. Well, I guess it's time to act on my little Master's order, I'm not that unfamiliar with house chores anyway, if not to say I'm pretty good at them. I had to take care of myself for most of the time after Kiritsugu passed away afterall, and when I came to London, it wasn't a suprise at all that I had to handle Rin's share of laundry as well, since she was so busy with all her researches. So I guessed I could proudly say that washing girl's clothing is nothing new to me.

Rin...

As I think about her, my memory of the break up come back... It was so suddenly, so quickly that I can only truly realise that now. It was too surreal, the fact that I and Rin are no longer together, possibly forever, I refused to believe it until that moment earlier in Louise's room, and even clearer now that I'm alone here, in the dark...

It hurts, it really hurts...

"No! No! Stop that thought!" I shook my head, casted away the painful memory. I couldn't be worry about that now. I was summoned here as a Servant, that mean whatever reason it is, even if it's only a possibility that there truly is a Grail War here, then I have to do my best to win it, to once again destroy that tainted artifact so that it won't be albe to spread its malice... And if there isn't, well, it's still the duty of the Servant to look after and protect the Master. That's more than enough reason for me to stop mourning over the past now. It's not easy, but I have to do it, it's for the best...

And with those reasons in mind, I made another note in my head: "I should view everyone at this school as a potential enemy at the moment. It's for the safety of my Master."

"Well, here, finished." Hanging the last piece of Louise's clothes on to the rope as I said so "I guess it's time for me to go to bed."

Turned around, I started to come back to Louise's room, or our room? Oh well whatever, I will figure that our later.

By the time I came back, she's already falled asleep, looked at how peaceful she is, I just strengthen my earlier resolve to protect her. I knew fully well that all of this peacefulness will be replaced by her usual not very peaceful character when she wakes up though. And I couldn't stop myself from forming a grin on my face as I though so.

"So, goodnight, Louise." With that, I came back to my so called "bed", laid down, and fell asleep easily.

End of Chapter 1.