OK, I started this to get it out of my head, but then I spent a week making myself finish it. I'm tired of the delay, so once this is posted I'm dropping everything to work on my two main stories. They've waited long enough for me to update them.

Now please enjoy this, the first official Percy Jackson and the Olympians & Fate/Stay Night crossover.

Hi. I'm Percy Jackson. I'm a Demigod; that is, the son of a mortal and a god. My father is the Greek god of the oceans, Poseidon. No, really. I even saved the world once or twice.

Anyway, after my most recent adventure, saving my summer camp from an invasion for the second time in as many years, I was enjoying my time as a high school freshman. Going to class, making friends, preparing for an all-out war.

Oh right. The war. Well, you see, the Titan Cronus recently revived himself and declared war on the gods of Olympus. That was last summer, and me and the other Demigods allied with Olympus, a.k.a. our parents, have been preparing ever since. It was spring break now and I was supposed to be on my way to Camp Half Blood to help with the preparations. Note the 'supposed to be,' because I sure wasn't there now.

To be brief, I'm lost. The bus I was on entered a tunnel, I blinked, and then we came out of the tunnel and I was on a different bus in a different place than what I started with. I got off at the next stop, and decided I was in Japan. I don't know what tipped me off; it could have been all the smartly dressed Asian people, it could have been the weird fashion sense of the younger people, it could have been all the Hello Kitty merchandise. But we have all of that in New York, so I wasn't sure. I decided it had to be all the girls my age in the sailor-type uniforms. That was one thing I'd never seen in New York, but had seen on plenty of imported cartoons over the years.

So yeah, I was in Japan. Which was bad. I also had no money, not Japanese money anyway, another bad thing. But there were no monsters around, so that was good. And I had my sword-pen Riptide, which was also good. And I was out of gold Drachma, the money used by gods, monsters, and Demigods, which was probably the worst thing out of the lot. Without any Drachma, I couldn't call for help. I was stuck in a foreign country on the other side of the world, without any money, or a way to contact home. So not my best day. Well, it could have been worse.

I stopped walking and looked nervously at the sky and scanned my surroundings carefully. Yes I was being paranoid, but after as much weird as I've had to deal with in the past few years, you'd be at my back making sure that nothing was sneaking up on us while I looked the other way.

Once I had decided I was definitely in Japan, and that other than being penniless I was fine, I decided it was time to head for home. It wouldn't be hard, I just had to get to the sea and call up a ride. I am the son of Poseidon after all—one of the perks is command over the beasts of the sea. I knew of at least a few that could get me back to New York pretty fast, and there were plenty of islands between Japan and America if I had to stop to rest.

There was only one problem: I couldn't find the ocean. Sure, I could feel for water around me, but I was too far inland and in a city. There was water all around me in the plumbing. And since I was on a big island, the ocean was all around me. I could feel the seawater on the edge of my senses, just not which way to go to get to it fastest. So I decided to pick a direction and walk in a straight line to see where that got me.

I ended up in a park not much later. It was a nice little thing, definitely not as great as Central Park, but still, nice. There weren't many people around, which was fine, because I was tired of getting stared at. I guess not many of these people had ever seen an American. Oh, and I noticed another thing that was different about Japan: the birds. Where every American city I'd ever been to had a severe pigeon problem, Japan apparently had the same problem, but with crows instead of pigeons. Seriously, the black birds were everywhere. It was kinda spooky actually, especially with the way they were watching me.

My day got noticeably worse right after I passed a pretty girl with purple hair and big…um bags. *ahem* Yes, bags. Shopping bags. Anyway, right after I passed her this guy landed on the path right in front of me. He hadn't been walking down the path and he hadn't come out of the woods at the edges of the small clearing, he had just fallen from the sky and landed on the path just a few yards ahead of me.

"Whoa!" I yelled as I took a startled step back in surprise. The guy was wearing a blue robe-top-thing that stretched over his hands with weird black pants that looked like they had enough material for a couple pairs that stretched over his feet. He had a black cloak on his shoulders and a wide straw hat on his head. He was wearing a long red scarf wrapped around his neck and mouth so many times it covered him from his nose to below his collarbone. And he was carrying a sword, a Japanese one, a katana I think they're called.

It was his eyes, his only visible feature, that gave him away. They were black. Not just the pupil or the iris, but the entire eye was black. This guy, who appeared out of nowhere, that was dressed like a knock off from a samurai movie, with eyes that definitely were not human, wasn't human. I had no idea what he was, but I was willing to bet he wasn't friendly.

He said something in what I guessed was Japanese. His voice was slow and sharp, and I couldn't make heads or tails of it. "Um, what?" He said something else, I think maybe it might have sounded like the first thing. "Um, really sorry but, I don't understand you. You don't speak English, or Ancient Greek, by any chance?" Now he was mad. His eyes did that angry-squinty thing and his voice was louder and sharper. He reached for his sword and I pulled Riptide out of my pocket.

"Ano, excuse me?"

Both of us froze. We both looked over my shoulder, keeping one eye on each other, and found the girl with the…bags from before. She had apparently stuck around after passing me. She was staring at the two of us with wide, confused eyes.

She turned to me, also keeping an eye on the samurai and said, "Ano, he said, 'Child of the western gods, welcome to the land of the Rising Sun. I challenge you to formal combat.'" She glanced between the two of us again. "Ano, what is going on?"

"I'd like to know that too," I muttered. I turned more towards her and asked, "Could you maybe ask him why he decided to jump me?"

She turned back to the samurai and said something in Japanese. He said something back in what sounded like a polite tone. She turned back to me. "He said, 'It has been many years since a child of the western Gods walked these lands. I wish to see the legendary skill of their blades.'"

"Ah. Thanks." I returned my full attention to the weird samurai and studied him carefully. "I'm guessing there's no chance we can talk this out?" She asked him. He drew his sword. "I thought as much." I sighed. "To the death?" I asked as easily as if I was asking for the time of day. The girl gasped. That was fine. I didn't need the girls' translation to understand his answer.

He bowed his head to me and said something else in Japanese. I glanced at the girl; looking even more worried than before but she composed herself."Moribito Issei. His name."

I looked back at the samurai and nodded. "Perseus Jackson."

He charged. I uncapped Riptide and it expanded from a pen into its two-foot Xiphos form. I brought it up with both hands into a guard position. I met his first downward slash and my guard held. I held off his next strike but was forced to give ground with his third.

We both jumped back a few feet to regroup. Well, I stepped, he jumped. I twirled my sword to loosen my muscles and then leapt to meet his return slash head on. We traded a few more blows like that before I again had to give ground and we separated.

On the next charge, I jumped over his horizontal slash and tried to end the fight with a single blow. He sidestepped at the last moment and managed to dodge most of my strike, but not before I had cut through his hat, and severed several folds of his scarf.

We gave each other some more distance after my surprise attack. He took the time allowed by the pause to discard his damaged hat and ruined scarf. Now that I could see his face, I still couldn't figure out what in the name of the Gods he was. What I could see of his face before, basically just his all black eyes and a few inches of skin surrounding them was human enough. The rest though was covered in feathers. From the top of his head down over the top of his chest exposed by his robe-thing was covered in fine black feathers. And instead of a mouth he had a short beak. And if I squinted a bit, his cloak stopped looking so much like a cloth cover as it did a pair of folded black wings. The guy looked a lot like those crows I'd seen entering the park.

"What are you, some kind of Japanese Harpy?" my mouth asked without consulting my brain. It does that sometimes. Usually it makes for some OK banter, but not so much this time.

"SQUAAAAAWRKK!"

By the Gods, I think I just made him mad. Not good. He said something really fast, really loud, and he started glaring at me in a way that I recognized on a lot of things that had tried to kill me in the past.

"Ano," the girl with the…purple hair said. She was still standing at the edge of the clearing, watching the two of us with shocked worry. "He says, 'How dare you compare me to those filthy hens! I am a Tengu, a proud warrior descended from a great dynasty. You will pay for such insult!' Watch out!"

My eyes had wandered to the girl as she translated and immediately snapped back to the bird-samurai, or Tenbu, or whatever, just in time to parry his first slash from above. The follow up to my ribs came fast and hard, and forced me to jump back to keep myself in one piece. The succession of slashes that followed was the most intense yet, and it took every ounce of my ability and experience to keep from getting gutted. Though my skin stayed intact, my clothes looked like they'd gone through a paper shredder. I really needed to learn to keep my mouth shut.

At this point, I had to get lucky; find a hole in his guard. All I needed was one opening and a bit of luck and—

And then I tripped. My shoe came undone, I stepped on my laces, and I toppled over backwards. I had just enough time to wish I was near a pond, or a stream, or even a water fountain as I fell. At least then I would stand a chance against this guy.

Then I felt it. In the girls bag. I grinned.

I hit the ground hard. My opponent didn't stop moving, and neither did I. As he made the swing that would take my head off, I reached for my watch to press the button that would activate my shield. My shield was a gift from my brother Tyson. He made it to commemorate our first adventure together in the Sea of Monsters. He's a Cyclops, and as a Cyclops he was born with a talent for gadgets, gizmo's, and forging to rival any child of Hephaestus. My shield had saved me from some tough spots before, and I was glad for the wall of bronze between me and the winged samurai. And for the time it bought me to turn this fight around in my favor.

As a son of Poseidon, I had some unique perks. I could talk to and command horses and fish if they were willing to listen. I could sail a boat of any kind through any waters. I had a perfect sense of direction when at sea. I could create storms and earthquakes. I was mostly invulnerable in water, and could even heal the most serious of wound by taking a swim. And I could summon water from anywhere near me. Like from the bottle inside of purple-hair girls bag.

Even as his strike rebounded off of my shield, I was focusing on my God-given powers. I could feel the water just feet away, and all it took to summon it to me was an effort of will. I heard a startled 'Eep!' from the girl and a small crash as she dropped her bag. And then the water hit me, and I felt the familiar rush of power that always came with it.

"Thank Poseidon for water bottles," I muttered as I peeked around my shield to find my opponent and finish this. It was a good thing I was lying on my back, or I wouldn't have found him until it was too late. He had apparently decided to come in for a finishing blow from above like I had attempted early on. Where I had gone for a jumping slash, he had taken advantage of his nature and had used his wings to gain altitude.

I twisted into a crouch as he reached his apex and turned into a dive. With my endurance restored by the water, and my strength and speed enhanced greatly as well, I was more than ready for his attack. I raised my shield above me to intercept him, held Riptide unwavering and ready beside it, and braced for impact.

It was over between heartbeats. His katana met my shield and the force sent me to my knees. My shield buckled, but held. My right arm, and Riptide, never wavered. As soon as his steel met my bronze, I stabbed with Riptide straight through where his heart would be if he were human.

The weight of his falling body and the power behind his dive drove us both the rest of the way to the ground. I rolled him off of me and rose to a crouch next to him, my hand still on the hilt of Riptide. I met his eyes and saw a look I'd never seen in the eye's of the monster's I'd slain before, a mix of contentment and respect. He coughed some blood and said my name and something in Japanese after it. The girl had made her way to our side after we hit the ground, and she whispered, "Well fought, Perseus Jackson."

I kept my eyes on the warrior beneath me and said in as respectful a tone as I could, "Well fought, Moribito Issei."

The bird warrior grinned at me, somehow managing it even through his beak. Then he closed his eyes with a sigh and quickly faded away. All that was left was a few feathers on the wind, and his sword at my feet.

I breathed a sigh of relief. That had been a hard fight. I glanced at my once more damaged shield. Great. Now I'd have to ask Tyson to repair it. At least he'd be happy that it had saved me again. I was definitely buying my little brother a brick of chocolate the size of his head for his birthday.

Well, considering how big his head was he'd probably have to settle for one the size of my head instead. My allowance wasn't all that big after all.

I caught site of something else in my shield. A lock of purple hair. Oh right, the girl. I looked up at her to find myself staring into her purple eyes with my sea green ones. Wow. She was prettier than some of the daughters of Aphrodite I had met.

The girl flushed a bit, then collected herself and bowed to me. "Ano, I am Matou- er, Tohsaka Sakura."

I gave a short bow back. I remembered something about Japanese people bowing a lot, and she had bowed so it was probably the polite thing to do. "Percy Jackson. Thank you for translating all of that. Uh, so, I should call you Tohsaka? Or Sakura?"

"Sakura will be fine, Percy-san."

I blinked at her, confused. "It's just Percy."

"Ah. How to say…?" She put her finger on her chin and looked up in thought. It was probably the cutest thing I had ever seen a girl do in my life. And the way she puckered her lips...

Remember Anabeth Percy. That hard headed, strong willed, beautiful Wise Girl. Don't let this exotic foreign beauty who totally blows her out of the water in looks distract you from the girl you love.

Sakura 'Ah'd and slapped her fist lightly in her other palm, then caught my eyes again. "Japanese is a very polite language, Percy-san. Honorifics like –san or –chan are added to the end of a person's name like Mr. or Ms. would be added before in English. Adding –san is the standard for people who have just met. Do you understand?"

"I think so Sakura, er, san?"

She smiled at me like I've never been smiled at before. Who was Anabeth again?

Fortunately for my mind and my heart, and my future with Anabeth, my stomach still had its head in the game and decided it was time to remind me that I hadn't eaten sense breakfast by rumbling loudly.

Sakura and I were walking down a rather bland street that looked like every other street in this suburb. After my stomach interrupted our awkward conversation, she had invited me to come along to her friend's house, where she went regularly to help with dinner. Fortunately it was nearby, only a few blocks from the park. I offered to carry her bags for her for wasting her water. I would have offered to replace it, but I still had no useable money.

The house, when we finally got there, was nice, in a Japanese sort of way. How would Anabeth put it? It was…aesthetically appealing. The yard was wide and the grass was green and well maintained. The house was made of wood and raised off the ground several feet. The path from the gate was cleaner than any street I'd ever been on in New York. What parts of the roof I could see looked like they were covered in the same curved ceramic tiles as every other house in the area.

The most beautiful woman I had ever seen, barring Aphrodite of course, though this woman could definitely give her a run for her money, greeted us at the door. Her jeans and sweater were so full that I felt my jeans tighten in response. She was taller than Sakura, about my height, maybe 5'8" or 5'9". She had Sakura's odd long purple hair and eyes behind thick glasses, but a shade lighter, so maybe they were siblings? But I thought she said this was her friends house?

Sakura seemed to cheer up immediately at seeing her. "Ah, Rider-san. This is-"

"Percy Jackson. This is surprising." The woman, Rider, cut her off. She was staring at me with intense curiosity.

Now it was my turn to be confused. "Excuse me? I don't think we've ever met before." I'd remember meeting a woman as beautiful as her.

"Really?" she said with a quirked eyebrow. Then she grinned a grin that was equal parts sultry, endearing, and dangerous as all Hades. "I would have thought you'd remember the woman whose head you cut off."

OK, now I was confused. I cut her head off? That was impossible. I mean, she was standing right in front of me. And the only woman whose head I had ever cut off was the monster Medu…

Oh Zeus.

Now to clear up some potential confusion, and plug an author who if you're not reading you should be: this is the first official Percy Jackson and the Olympians & Fate/Stay Night crossover, meaning the first in the crossover section. Shadow Crystal Mage wrote the first ever PJO/FSN crossover in the FSN section, 'Of Medusa's in Central Park,' early last year, but since it's not in the crossovers section, it doesn't technically count as the first "official" crossover.

OK. I have an idea where this is going, but I'm not set to continue this just yet. As I said before, I have more important stories to focus on.

Please tell me where I went right, where I went wrong, and where I could have gone better.

Reviews are the food for an authors soul.