As the world began to surface around them, all thoughts of the twin's argument were pushed from Yuki's mind. The broken brick walls that put themselves together in familiar ways, broken pieces of murals. Murals that Yuki had never understood even when they were all together in one piece. 

Yuki was the first to stop placing a hand against the mural she had known quite well. It was the easiest place to use as a marker when she had arrived in the city. It had been one of the least bizarre things in the world, which wasn't saying much after a moment of thought. Yuki glanced over her shoulder, both X and Y had stopped. Though they stood a fair distance apart both were watching her.

"First one we know," Yuki said. Though it was probably only her who really knew the place. X and Y had only seen the shadow of Yuki's memories.

"Got an idea why?" Y asked. Yuki frowned turning back to the mural.

"Well, the others. They all wanted to change something, right?" Yuki asked. She didn't hear any response, and she didn't think she would get something. All had desperately tried to change some part of their lives. "The first world was about getting back to the glory days. And the second was the empire trying to rebuild after the tragedy. And, the last world was about changing your fate."

"So what does this world change?" Y asked. "You never really explained it that much." Yuki nodded in agreement. There hadn't been a reason to then. Yuki hadn't thought the world had been that important in their plan. Certainly not that she would see it again.

"There was, this thing," Yuki said. She sighed as she turned around and crossed her arms. "The reapers game. Joshua explained it once or twice, and Ayano too. But, it was a game the dead could play to come back to life."

Both X and Y weren't able to mask the surprise that crossed their face. X glanced at Y, though Y didn't look at him, her focus remaining on Yuki. It had been a crossing thought for Yuki at the time. But she was beginning to realize it might not have been to others. People actually coming back from the dead. What Yuki wouldn't give for that to happen for their friends; if they really counted as dead.

"It really brought the dead back?" X asked, turning his attention off of Y and back onto Yuki. She shrugged, turning her eyes to the ground instead of the others. It did nothing for the feeling of pressure on her. She could feel where their eyes were staring at her.

"I don't know for sure," Yuki admitted. "I only ever saw the players lose. But Joshua said that was why they played in the first place."

"It certainly fits the bill with the rest of the worlds then," Y said with a heavy sigh. Yuki glanced up again as Y crossed her arms. Her face was twisted into a frown, her foot tapping. "So they have their point, but it makes no sense. Just like before."

"Right." Yuki agreed. They had made their point. Desperate attempts to change their fate. Return to the days before, find a lost empire. Quite literally a world where they needed to change their fate. And all stemming from their attention on the lives they had once had. Lives they wanted to return to. Aryum had said as much. "They've been caught up on the past from the beginning, haven't they?"

"Meaning?" X asked.

"At first I thought it was just because the worlds were from our memories," Yuki said, giving a slight nod to X. "That's why they kept bringing it up. But, Myruai mentioned something about one way or another until the lose the cursed mark. Arykii talked about changing the past from the first floor. What if that's their plan?"

"That's impossible," X said quickly. And Yuki was inclined to agree. But there seemed to be no other reason for such focus. And even the impossible was possible somewhere.

"Are you sure?" Yuki asked.

"There's nothing that can change the past," X said without hesitating. "What's happened has already happened. Time travel is impossible." As soon as the words left his mouth Yuki could see the thought cross his mind. He looked down, tapping his chin.

"What?" Y asked. She had read the same look on X.

"I might be wrong about that," X admitted. Yuki and Y both looked at him, waiting for him to continue. "There was a world I went to with Sora. And it was technically just Disney castle in the past."

"Do you think they could pull something similar?" Yuki asked.

"I don't know," X admitted with a shrug. He ignored the glare he received from Y, pushing forward through his explanation. "Merlin didn't explain much. Except we couldn't interfere more than fix what Maleficent and Pete had done. So, I guess in theory there's no reason they couldn't."

"Change the past." Y seemed less than surprised at this statement, only watching X carefully.

"And they need us?" Yuki asked. X shrugged.

"Maybe we're just jumping to conclusions," he said. Yuki held back her frown. That's all they ever really had, and it wasn't much of a problem when they had said the three were necessary. "They've never said anything about changing the past directly. They were just bringing up things that would make us think of our pasts to put us on edge. None of us have had exactly pleasant lives. And they've said they want us on edge."

"But again and again?" Yuki asked. She knew there was a line between a coincidence and whatever this was. An obsession from the looks of it.

"I hate to say it, but none of us are all that special," X said. Yuki frowned once again. Although he was probably right there. She wasn't much outside of a keyblade wielder. "Aside from being the highest-ranking heartless currently around. I can't think of anything special we might be able to do that would change the past."

"Well," Yuki said with a sigh. X had a point, as he usually did. She couldn't even imagine changing the past up until this moment. There wasn't much she could do to change what had happened. "No matter what they plan on using us for. We need to reach them. Y." She turned to look at Y, who perked up immediately, wiping a worried expression from her face.

"Lights remnant, coming right up," Y said. She took a moment to survey the collapsed city spreading out in front of them. After a moment's pause, she began picking her way through the city. 

After a time spent jumping from building to building they found themselves on what remained of the 104 building. It was higher up than the rest of the buildings had been, looking down over the entire broken city.

Yuki frowned looking over the city. It looked much smaller. It must have been too much to bring the entire city. So even in ruins, there couldn't be everything. She could pick out what should have been the scramble crossing. Some remains of side streets fell into nothing. It looked like even the street the cafe had been on was gone.

"A pin."

Yuki turned to X and Y. Y was holding a pin in her hand, looking at it with a sort of confusion.

"Fits everything else we've seen," Yuki said as she crossed the roof to the twins. Y handed her the pin with a shrug. Yuki took a moment to look over the pin. It was a simple black pin with a white skull pattern design on it. "Hm, I think I've seen one of these before. Joshua had it for something."

"Think it has to do with the game?" Y asked, crossing her arms.

"Probably," Yuki said as she slipped the pin into her pocket. She frowned looking over the city once again. "Joshua. He was the composer."

"Composer?" X asked.

"The guy in charge of the whole game," Yuki said, thinking back to the explanation she had been given. Even with an explanation, it had seemed so foreign and strange. Something she could never understand, who would run such a game and why? Something Ayano couldn't explain. And apparently something Joshua wouldn't explain. "I always thought it was weird how much he knew. Mr. H was the Producer, so it made sense he knew things. And Ayano didn't know much more than what Mr. H had told her. But Joshua always knew too much."

"You didn't know he was the composer, did you?" Y asked. Yuki shook her head.

"Not until Castle Oblivion," she said. A frown crossed her face. "I wonder, if they did more recon than I thought. To figure that out about him. Something he wouldn't even tell his best friend."

"This game sounds dangerous," X said. Yuki nodded in agreement. It had certainly seemed it. Players only seemed to lose. "Maybe Ayano would have been in danger if she knew and he wanted to keep her out of trouble." Yuki smiled a little at the suggestion, holding in her chuckle.

"Hm, that would be a little odd for Joshua. I never thought he cared much about others. But, maybe." Yuki sighed as she shook her head. Now wasn't the time to worry about it. They had bigger issues. "No use worrying about it. X, the heart."

"Follow me," X said.

X took them away from the rooftops, down to the ground. He easily led the way with hands in his pockets when they weren't fighting off the Heartless that appeared. After passing a dog statue he took a pause in front of a bridge of sorts, though his attention was on what was under it, rather than the remains of the bridge.

"It shouldn't be much farther ahead," X said, glancing over his shoulder at Yuki. She nodded slowly, looking around.

"Right."

"Something up?" Y asked, leaning forward just slightly.

"Never seen this part of Shibuya before, that's all," Yuki admitted. Ayano had said there was nothing to worry about past the underpass. Just more graffiti and the occasional attempted mugger.

"Hm. Wonder where this leads," Y said, narrowing her eyes as if to see farther.

X seemed to take that as the sign to keep moving. He led them through what slowly changed from anything they had been expecting. Instead of it remaining as an underpass it soon seemed they were inside a building of sorts. And soon they were in what could only be described as a suite of sorts. Perhaps an office. Yuki looked around in confusion.

"Alright. Not what I was expecting," she said.

"The composer operated in comfort. He despised most of the city, so this was where he spent his working days."

Yuki sighed, turning towards the familiar voice. She was met with a sweet smile as Myruai sat with her legs neatly crossed on a nearby couch.

"In the right place I guess," X said, his attention also falling on the brunette heartless. She giggled slightly.

"Yup," she confirmed. "Not that there was any question. X is drawn to the fallen hearts. And Y to the light's remnants. Quite the opposite of each other."

"We've never been all that similar," Y said with a glare.

"Hm," Myruai considered what Y said for a moment, looking between the two twins. She was silent as she thought. Yuki frowned following her gaze as it moved. The twins stood almost as far from each other as they could manage.  "Guess you're right. Anyway, I have a message for you from Aryum and Tayressa." Myruai decided, standing and brushing herself off.

"Another plea for us to help you without a fight?" Yuki asked.

"Well, I'm sure that's implied. But, no," Myruai said, tapping her chin lightly. She smiled as she turned her attention fully to Yuki. "It's simpler than that. We're ready for you. Please make your way to Castle Impia post haste. The show can't start until you three arrive."

"What do you need us for?" Y demanded. Myruai sighed, her shoulders slumping slightly.

"Um, Aryum says that the clues are already there. And if you all just talk, then it should be obvious. But, she also says you won't trust each other, or other reasons for not talking," she said. She sighed again, keeping herself slumped forward.

"Fine, whatever," Y huffed, her eyes narrowed in a glare. It made sense why Myruai was trying to appear smaller. Y's glares were enough to make anyone feel small.

"Um, Aryum did have something she specifically wanted you to know Y," Myruai said, glancing at Y. Y's face only soured more.

"Unless she's going to tell me what I want to know I'm not interested."

"Oh. Well," Myruai said, sighing again as she rubbed her arm. "I guess I can't tell you then. You know she doesn't just give out information."

"Is that all, or is there another reason you're in our way?" X asked. Myruai smiled as she turned to face him.

"I don't like this but," her flute appeared in her hand. She twirled it briefly before placing her fingers along the keys. "Aryum says we need to bring you in as quickly as possible actually. Since your friends are progressing so quickly. Gotta stop Xehanort before he gets what he wants."

"What?" Y said, seeming in shock.

"What is he doing to Sora and Riku?" Yuki demanded. They had known he was moving. Had learned as much in the castle. Or at least that he was planning to move. But if they knew what he was doing.

"No clue," Myruai said with a shrug. "Now, let's begin."

Fighting Myruai was more difficult than Yuki had been prepared for. It was hard to block attacks that were sound itself. The best they could do was stop her from finishing a series of notes and unleashing whatever magic she had waiting for them. More than once one of the three ended up asleep or with some other sort of effect. Y was on her toes keeping them from being knocked aside.

Myruai stumbled back from them, darkness rising off of her is wisps as she stared at the back of her hand.

"It's gone." Myruai chuckled as she fell to the ground.

"Does that mean you can go home now?" Yuki asked, watching her.

"If there's any home left," Myruai said, looking up with a sad smile. "I'm sorry, all three of you. You're good people. You didn't deserve this."

"No one does," Yuki said. "You didn't either." Myruai chuckled, looking back at her hand again.

"Well, good luck. I think, Aryum might be right." She smiled one last time before she faded back to the darkness, a pink crystalline heart floating away. The last trace of Myruai.

"Right about what?" Yuki asked.

"Who knows," Y said, huffing in annoyance.

Yuki sighed as she crossed to the heart, it wasn't anything that stood out. Just a part of the wall. She placed the pin beside the wall before pointing her key. The gold chains appeared wrapping the lights remnant and the heart. In a flash Yuki's mind was filled with more images. These ones more familiar, though not quite. An orange-haired boy and a red-haired girl making their pack. The reapers and their games. Joshua and Mr. H and Ayano. All with the timer ticking.

When she opened her eyes they were again in the darkness between worlds. She frowned, looking up at the darkness. There had been so many people in this world. What had happened to them all?

"What?" Y asked, gently tapping Yuki's shoulder.

"Nothing," Yuki said with a forced smile. It dropped in seconds. "Just wondering, if Shibuya was here. What happened to the people in it?"

"Best not ask," X answered. Yuki felt her heart sink at the answer.

"They either fall into darkness, or find their way to haven worlds," Y explained. Yuki nodded, letting out a breath. It was better than assuming the worst. "But, it's impossible to know for sure."

"If their world returns they return, providing they aren't heartless or nobodies," X added.

"Right," Yuki said. That was a thought she didn't want to entertain. A Heartless out of Joshua was bound to be a pain.

X and Y continued down the path, leaving Yuki with her thoughts. Watching them she frowned, her mind racing.  Xehanort was moving. They knew it for sure now. After Sora and Riku. Like he had been after Y and her friends. That paired with the Heartless seeming to need them. Perhaps for the same reason Xehanort had.

"Tenebris and Lucerna."