Tolly: An explanation for Hollis, Friday, and Autumn may be in order. Friday and Autumn are world-hoppers. They are sent to different worlds by Hollis the Librarian, who is the keeper of all stories. I may or may not end up writing a story about them.

Disclaimer: I don't own FMA, YYH, or Once On This Island (but the lyrics fit perfectly).

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In one world, there are people gifted with the ability to change one thing into another. They are known as alchemists…

In another world, three planes coexist: the spirit plane, the demon plane, and the human plane. In this world, there is a group of beings known as the Reikai Tentai, the Spirit Detectives…

"Two different worlds…never meant to meet…but if the gods mover our feet…"

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Ed looked around, without out a clue as to what was going on. The last thing he remembered was blacking out, and the next thing he knew, he was in what looked like a huge library. Curious, he scanned the titles on the shelf next to him. With a start, he saw a book labeled Full Metal Alchemist. He reached out to take it off the shelf.

"It's never a good idea to read one's own story, Master Elric."

Ed pulled his hand away from the book as a person appeared beside him. He seemed no older than Ed was, but wore half-moon spectacles and flowing robes.

"How do you know my name?" asked Ed suspiciously.

"I am the librarian. I know all about you."

"Okay, that's creepy…" Ed muttered. "So, why can't I read that book?"

"People have gone mad when they read things that are yet to come."

"Jeez, Hollis. Way to sound deep." said a girl's voice, coming from nowhere.

"Friday!" snapped Hollis. "Shut up or I'll send you to Teletubbie Land!"

"Fine, be that way."

Hollis turned back to Ed as though nothing had happened. "As I was saying, you can't read ahead. Otherwise, you would know what was about to happen to you."

"Why? What's going to happen to me?" Ed was slowly backing away from the librarian, thinking he might be just a little bit insane.

"You'll see once Hiei gets here." They heard a startled yell from another row of shelves. "Ah, here he is now. Hiei, come over this way!" Hollis called.

A figured clad in black appeared at the end of the aisle. "What's going on here!" the newcomer yelled.

Hollis pretended he didn't hear Hiei. "Good luck to you both." He closed his eyes, evidently preparing to do something.

"Yeah, and watch out for rabid fan girls!" Another girl's voice shouted.

Ed and Hiei heard Hollis yell, "Autumn!" Then there was a brilliant flash of light, and they ceased to exist as separate entities.

Hiei cried out in pain as he lost his right arm and his kokoryuha switched to his left arm. In the next instant, he felt his left leg disappear as another consciousness touched his own.

Meanwhile, Ed felt as though his left arm was on fire, and there was also an intense pain on his forehead. Just as he was thinking that this was like a transmutation gone horribly wrong, he heard a thought that wasn't his own. Why didn't I kill him when I had the chance?

Who the hell is that? thought Ed.

The other consciousness was instantly on guard. What are you doing in my mind?

What! You're in my mind, not the other way around!

Hn. You wish.

They both became aware that they were surrounded by blackness and were rapidly approaching a bright light.

Do you see that? asked Hiei.

I think it means we're dead or something. Ed answered.

I doubt that weird guy at the library would wish us luck right before killing us.

Yeah, but he seemed a little crazy to me.

With a force that knocked the wind out of them, they landed on a beach.

Ouch, thought Ed, rubbing his sore behind.

Hey! Quit touching my butt!

What are you talking about?

You were just…

No, I wasn't! Ed looked around. There was a dock not too far away, so maybe there were people here too.

Wait, said Hiei. Do that again.

What, rub my butt?

Baka ningen. No, turn the head.

Wondering what Hiei meant by "the" head, Ed turned his head again. Almost immediately, his head turned the other way.

This can't be good, said Hiei.

You just turned my head, didn't you?

No. I turned my head. Hiei stood up, and Ed was pulled to his feet as well. I feel alright, but there's something wrong with my leg. And my arm.

Would that be your left leg and your right arm?

Yes.

Uh-oh. That librarian must have put you into my body.

Your body? Feel your forehead, ningen. Hiei/Ed put his hand to his head, and felt the band of cloth across it.

What the…? said Ed.

That would be the ward covering my third eye. And there is also a ward on my left arm. It would usually be on my right arm, but…

Ed's eyes grew wide as he finished for Hiei. …But I don't have a right arm.

Yeah, why is that?

Um…an accident. So are you saying that our bodies have been combined?

Hiei gave an affirmative reply as he sat them back down on the sand and rolled up their left pant leg, revealing the automail limb.

Must have been quite the accident, ningen.

Why do you keep calling me that?

It means human.

Aren't you human?

Absolutely not. I'm a Youkai.

Whatever that is. I'm known as the Full Metal Alchemist. Maybe you've heard of me?

No. We're from separate worlds, remember? Ed/Hiei looked around again. Is this, by any chance, your world?

Ed shook their head. I've had some weird things happen to me, but this takes the cake.

I concur. Someone's coming towards us.

I know. We have the same pair of eyes. I mean, three eyes, I guess. They looked again at the people approaching them, though still fairly far off.

Three to one? thought Hiei. Hardly seems fair.

Technically, it's three to two.

I'm counting bodies. This might be just a guess, but I don't think we can be in two places at once. So the odds are three to one. Let me rephrase that: three ningen to one youkai.

Hello? Alchemist here. I count for something. Probably more than you.

I highly doubt that.

Why? Because I'm a ningen?

Yes, a disabled ningen.

Hey, we're sharing a body. That means you're "disabled" as well.

Well, my skills make up for any lack thereof that you have.

Shut up before I hurt you.

How about we both shut up and pay attention to the people coming towards us? Besides, if you try to hurt me, you'll end up hurting yourself.

So, it's psychological warfare? I've been told I can be extremely annoying.

If this situation becomes a matter of endurance, you don't stand a chance.

Oh, really? You underestimate the Full Metal Alchemist.

Hiei scowled and tried to fiddle with his wards.

Other arm, genius, said Ed. We're left-handed.

By then, the three people were in speaking distance of them. Ed/Hiei looked up at them, both thinking the same thing: This is going to be interesting.