O N E; .welcome back, yusuke !

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , .

"Welcome back, Yusuke." Said by the voice of a child, complete with a baby's appearance. This baby is known as Koenma, and his power in the spirit world is vast compared to his stature. He sat behind a large desk containing several piles of stacked papers. The large doors that provided the only enter-exit pathway had closed behind someone with a more matured form. A male that is without doubt to be assumed as a rowdy teenager, one that goes by the infamous name of Yusuke Urameshi. These two unruly individuals, are actually allies.

"So, what's the deal this new assignment crap? Wasn't I permanently fired from being a Spirit Detective?" Apparently this hoodlum didn't waste his time on introductions.

"Yes, well… Though I wouldn't call it an assignment. And it is true, you can't take on that job again. Not unless I have a death wish against my father. But this is more a favor; between friends, you can call it." Koenma was calm, but there was hint of desperation in his tone that Yusuke managed to catch.

"I don't know, Koenma… Its only been a month since I returned to the human world. I doubt Keiko and my mom are gonna be happy about me leaving again." Responded Yusuke. There was a dramatic pause that brought back some memories of his past missions as a spirit detective. Which weren't the kinds of memories one would enjoy reminiscing about. Then Koenma began to break some sweat droplets, his voice lowered to the point of intent seriousness.

"To be honest, you were my last resort."

"Gee, I'm honored."

"Once again the human world could be grave danger, and you seem to pull off miracles for these sort of situations."

"Thanks. I'm freakin' used to kicking ass and saving the world." Obviously, Yusuke was growing impatient. He stepped forward towards Koenma's desk, hoping to get a better sound quality upfront. "But, wait a minute! I thought demons were forbidden from causing havoc in the human world?"

"Demons aren't the issue here." The former spirit detect was about to reply, but then Koenma began rummaging through his desk. The baby-figure of his found what he seek, and began flapping a packet in Yusuke's face. The teen took the papers and began scanning it.

The words: Soul Society, and Soul Reapers stood out.

"I never had any chance to tell you about the other human world. So I'm going try to make this as simple as possible. There are two universes existing parallel to one another, separated by multi-dimensions barrier. It was supposedly impossible for creatures from our universe to cross into theirs. For even if a creature managed to pass through their universe, they'll be caught by the barrier that which sends them to countless amounts of other dimensions." Koenma paused, making sure Yusuke had time to absorb. "I've recently received reports about the conditions of the multi-dimensions barrier… It seems that someone, or something is nearly complete in breaking it. We don't know how they're doing this in such short time, though I'm sure whatever is the cause is tremendously powerful."

"Okay… So I'm gonna take it that you want me stop the barrier from breaking?"

"Yes. That, and I need you pass on my message to Soul Society. Which is the parallel version of spirit world."

"Spirit world's messenger? Sure-"

"Before you jump to conclusions, I need you to consider some things." As soon as Koenma cut Yusuke off, the teen knew what was coming up. A huge life decision, will ultimately decide whether he should stay or go. Yusuke already had a bunch of reasons why he shouldn't take on this mission. The fact that there were more, didn't help his sanest. Nothing was ever simple with this toddler.

"It's possible, that even after you stopped this cause from breaking the barrier, that you can never return. The multi-dimension barrier can restore to it's former form and I don't have the slightest clue when that'll happen. But there is also another slim chance, that if you failed to stop the barrier from breaking, no huge harm between the universes. As long as whoever is responsible is defeated."

"So it comes down to one thing: defeat the villain." Yusuke nodded.

"Basically." Added Koenma.

"So if it's so impossible to cross into the other dimension, then how am I suppose to stop this guy from crossing through the barrier?"

"The barrier is already nearly broken, and Botan can easily travel right through the universes. Compared to the barrier, our existence doesn't threaten it to collapse. So you can pass through and into the other world with ease." Koenma seemed to be at ease after taking up so much time to explain. "Or at least, we can. They can't, because the barrier is trying to prevent the thing trying to destroy it from- well, destroying it. So you won't be able to come back so easily."

"What about the demons of this world? Have they started moving to the other universe yet?" Yusuke's question didn't seem to bother Koenma this time.

"No, I doubt they even no how to get there. Only my father, Botan, and I know the way the only safest entrance."

"Okay. Well, I'm going." Yusuke slapped the packet onto Koenma's desk.

"You don't waste time, do you?" Sighed Koenma.

"All those other details I'll figure out myself." Suddenly, he heard the doors behind him give off that eerie squeak as it opened. He didn't bother to turn around since he wanted his other question to get through. "So when am I going?"

"Immediately." Simple put, by the son of spirit realm's ruler.

"Hey, Yusuke!" A familiar female voice came from entrance, and Yusuke quickly turned to see Botan. Though there were more familiar faces standing beside her.

"Out to save the world again, Urameshi?"

"How nostalgic. Looks like we'll be fighting alongside one another again."

"I don't understand why I have to be involved in yet another heroes conquest."

"Hahaha! Kuwabara, Kurama, and Hiei! So I'm not going solo this time, but hey… Nice to have you guys on board."

"Last time, all you guys went on to fight this big battle for the king tournament without me so… this time I'm getting a piece of the action!" Laughed the ever-so confident Kuwabara.

"Too bad you'll be dead before that happens. Once again you mistaken this journey as a child's game." Retorted Hiei, who clearly wasn't as amused as Kuwabara. "Why don't you run along and save everyone the time of having clean up your carcasses."

"I forget, who invited the party-pooper?" Kuwabara looked over to see Botan motion her head towards Kurama.

"I will gladly leave-" But before Hiei could finish his thought, Kurama interrupted him.

"I almost forgot." Kurama gently pounded the bottom surface of his left first with the palm of his hand, almost like how a light bulb would flash over a cartoon's head. "Isn't this the perfect time to tell Kuwabara about his brother-in-law?" Red locks leaned towards Hiei's direction, the other demon's ear made a single twitch. Their conversation reduced to murmurs, that excluded Yusuke, Kuwabara, and Botan from hearing.

"Quit being a pain in the ass, Kurama."

"Sorry, I had no other choice but to resort to this."

"Way to put the dimwit to use." Hiei snarled under his breath.

"Think of positives: you can get stronger if you come along with us. I'm sure there are a lot of potentially strong creatures in the other universe. And a rematch with Urameshi is a possibility." The three that were left out of this small chat tried eavesdropping. Though the conversation ceased when Hiei didn't respond. "Seeing that there are no more rhetorical objections; we are set to leave."

"What about you, Kurama?" Yusuke shoved another one of his questions, this time at demon possessing a human host. "Will you be alright, seeing that you wanted to leave your past behind and all? The fights might get rough."

"Don't worry about me. I'm not handicapped, I can fight in this form." Our former spirit detective couldn't help but to feel concerned for the well being of his fox-demon friend. During Kurama's last fight in demon world, he had sworn never to revert back to past self- Yoko. By choosing to continue the normal-human life of Shuichi Minamino. The fact is Yusuke felt guilty for dragging Kurama (even if Kurama volunteered) to yet another fight-to-the-death business. Which meant will have to swallow his onus thoughts and trust the demon's words for now.

"Now that that's settled, let get going!" Chimed the female grim reaper. She pumped her fist into the air, and galloped back into the poorly-crafted hallway. Kuwabara trailed after her, who was followed by Kurama and Hiei. But before Yusuke did the same, he heard Koenma call his name. The main protagonist turned back. Koenma handed a letter seal with a stamp designed in the most peculiar fashion, to Yusuke.

"Whatever you do… Don't get too attached to the other world. Remember your home belongs here." Little did Yusuke know that these parting words will be greatly significant in the coming future. He first took the letter, then shoved it into one of his pocket. After that, the teenager gave one of his trademark smile of reassurance.

"Just pass on the message to my folks." One nod from Koenma, meant he will do so immediately. With that, Yusuke left the office.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , .

E N D;.of the first chapter ?

.mugiwara natsu - once again, i went and made another crossover. sorry, i can't help but to exploit my own imagination. anyways , i have to say that this is by the far one of the most organized first chapters i have ever created. i tried my best to stay faithful to both plots while still trying to provide a realistic evidence for the two incoherent universes. since the both freakin have their own different dimension and crap. keep in mind , that i might not even include the vizards… i'll just replace them with the yyh gang. there's going to be too many characters for me to keep track of with them. this way will spare me time to write about them and you the time read my unnecessarily detailed explanations.