Summary: The Spirit Detectives, having succesfully come back from a mission, have found that the Spirit World's prince is all that they thought he could be. Koenma is evil, four of the universe's most horrible curses have been released, and it's up to a fired team of detectives, a kitsune god-in-training, and a heartless murderess to save the three realms! Kami-sama help us...

Pairings: These will be posted in later chapters.

AKN: Konnichiwa Minna-san! Well, Let's say cheers to my first fan fiction on this website! I just want to mention before we start, and this stands for the rest of the story, that this was co-authored with death destruction and love, a fellow authoress. She owns an OC who will make an appearance in later chapters as one of the main characters.

SD's: Boo!

AKN: H-how could you guys? That's just cold. -pout-

Hiei: Baka onna, just start the fic.

AKN: I can't if I don't put up my disclaimer and you said you wouldn't when I was nice enough to offer. -Sticks out tongue-

Hiei: Hn.

Kurama: -clears throat- I will say the disclaimer… Angelkitsune-Naomi does not own Yu Yu Hakusho; if she did she would not be having a one-sided glaring match with Hiei. Angelkitsune-Naomi only owns her plot, Mihiro Tsukino, Naomi Tsukino, and any other OC's who will become known in later chapters. Also, this will become a huge crossover with many other anime, so if you would like to know the other anime, please ask in a review. We also ask that you don't flame, she is a greenhorn after all. This fan fiction is rated PG 13 because of Yusuke and Kuwabaka's- I mean Kuwabara'smouths and because Youko is a perverted old kitsune.

-protests are heard in background-

AKN and Kurama: We thank you kindly! Now please enjoy 'The Forbidden Four'!

Hiei: Hn.

The young man, a kitsune God, stood in an open field, his hair being whipped around his pale face by a harsh wind, with rain pelting down upon him. Tears streamed down his face, his eyes were darkened by pain.

"W-why? I know I can save you! You don't have to do this for me!" he yelled. Alas, he was not alone in the field, for a young woman bearing similar features barely stood by herself as she bled deeply on a pale blue kimono, now dyed crimson with her blood.

"Otoutou, I must… do this. I love you, I want you to live Mihiro, whether you want to or not. You are the last of our kind, you have to carry on our name," she replied to the younger kitsune's plea. He shook his head defiantly and looked at her, begging with his eyes. She simply smiled and shook her head, then coughed as blood trickled down the side of her thin mouth. He held out his hand and stepped forward as if to help her, but she stepped back quickly.

"Get out of here! Now!" she screamed as storm clouds began to gather above her.

"No, p- please!" he started, but the demon that had forced him and his beloved sibling to part had descended from the cloud that had now gathered around his sister. Smirking triumphantly, he grabbed her around the waist and stepped back. Mihiro growled deep in his throat, his own wounds flowing freely andthrobbing in beat with his growing hatred of the demi-god. He knew that his sister was counting on him for revenge after they had been forced to do this, and he was willing to kill this demi-god when he was finally returned to his power.

"So, you decided to sacrifice yourself instead of your younger brother? He is so weak; he may never get revenge for your reckless decision. Are you sure you want to do this for him?" asked the demi-god with a vicious smirk.

"He will gain his power and damn you to an eternity in your own Hell, Koenma!" replied the young woman, drawing herself up and spitting in his face. The demi-god snarled and slapped her hard, if she had not been a kitsune she would have most definitely died of a broken neck.

Mihiro growled viciously again but held his ground; he knew he did not have his full powers yet and was not so foolish as to get himself killed before he could get his sister'sproper revenge.

The demon became surrounded by the clouds again, and began to disappear with the young female kitsune in his grasp.

"Koenma, I'll kill you for this!" screamed Mihiro as the demon disappeared. He watched as the skies began to clear, the rain already slowing.

"Naomi, daisuki!" he screamed again as he saw his sister for the final time for over 160 years. Unbeknownst to him, he would have some help from a certain group of Spirit Detectives.

"Yusuke, I think he's waking up…" stated a young man with crimson hair and dark green eyes. He wore a pair of jeans and a yellow button-up shirt over a white wife-beater. Another man with slicked back black hair, chocolate brown eyes, jeans, a white T-shirt, and a jean jacket turned to him with an intense glare.

"Yeah? Let's see what he was doing there, then. What kind of a demon is he, Kurama?" asked the man as he eyed the white-haired youth lying on his fellow detective's bed.

"Huh? I didn't know he was a demon…but he does have a weird aura," stated a red-haired guy in a blue school uniform.

"What do you mean Kuwabara?" asked Kurama as he eyed the other detective.

"Well, he seems mad and depressed, but he also has a pure sense of serene calm to 'im," stated Kuwabara with a puzzled look. A shorter man, wearing all black except for his white bandanna and the white starburst in his spiky black hair, had been silent through the whole exchange, and now smirked at the confused Kuwabara.

"What's wrong? Are those words too big for you to comprehend? Do you even know what they mean?" asked the man clad in black.

"Shut up Shorty! You wanna start something?" yelled Kuwabara as he took the bait. Kurama, who had been 'coughing' into his hand, smiled gently at the man in black.

"Why do you tease Kuwabara so Hiei?" asked Kurama inquiringly. Hiei simply grunted and went back to silently watching the figure on the bed, which was now moving. The group watched as the white-haired youth sat up on the bed, clutching his right side as he hissed in pain.

"You shouldn't move around so much. That was a pretty deep sword wound," said Kurama as he moved toward the boy on the bed. The boy stopped moving and looked at the group with wide eyes. The entire group stepped back in surprise, except for Hiei who remained impassive. The boy had one bright crimson eye and the other was crystal blue. The boy blinked, and then quickly looked down as he remembered his eyes.

"I'm sorry, I haven't been outside of the shrine in a long time, and I forget what an effect my eyes can have on people who aren't used to them…" said the boy in a soft voice. The group looked at each other, but it was surprisingly Hiei who spoke first, if harshly.

"What are you?" asked Hiei with an impassive face, yet his curiosity was eating at him.

"Don't you mean, 'Who are you'?" asked Kuwabara, determined to make the other angry for pointing out what (he thought) was a mistake.

"…My name is Mihiro, and you could say that in a way I am an endangered species." Mihiro said matter-of-factly. Three of the group's eyebrows went up at that, and you can probably guess who remained impassive through this. That's right. It was Hiei.

"I don't know about you, but last I heard humans weren't an endangered species," said Yusuke, who was now getting pissed at what he thought was a smart-aleck response. Kurama just closed his eyes while pinching the bridge of his noseand counted to ten, Hiei was trying really, really hard not to roll his eyes…and Kuwabara decided not to say anything since what Yusuke said was incredibly stupid (according to Kurama and Shorty's reactions). Mihiro blinked at Yusuke as if he had come from another world, and then, smiling gently, threw his legs over the edge of the bed, preparing to get up. He heaved himself up weakly and leaned against the wall beside the bed for support.

"I thank you all very much for bandaging my wounds and for allowing me to borrow your clothes, but I need to leave as soon as possible before Ko- he finds me," said Mihiro looking at all of the people in the room.

"Excuse me for saying this, but you're in no shape to be walking around," said Kurama as he walked over to Mihiro and began to push him down on the bed.

"H-huh?" Mihiro uttered as he was pushed onto the bed, "Why…am I so weak..?" he said more to himself.

"Well, you're only human, and you do have a five-inches-deep sword wound in your side that might have something to do with it," said Yusuke as if the boy were stupid. Kurama began to 'cough' behind his hand again; Kuwabara was still deeply confused.

"You know, you just might be right," said Hiei with a smirk.

"Whaddaya mean?" asked Yusuke, unsure if Hiei was being sarcastic or not.

"Hn," grunted Hiei in reply. Mihiro watched the group, and Kuwabara noticed the dark depression that laced his aura. Kuwabara looked at Kurama, who nodded as he also noticed the boy's aura.

"I'm sorry, but I don't know any of your names," said Mihiro when Yusuke had settled into a one-sided glaring match with Hiei.

"Please forgive our rudeness, Mihiro-san. The punk in the denim outfit is Yusuke, the guy wearing the school uniform is Kuwabara, the guy in black is Hiei, and I'm Suuichi, but my friends call me Kurama," said Kurama to the confused boy. Mihiro nodded and sat still for a few minutes. Then he looked up quickly with a startled look on his face.

"It's too late; they're coming! You have to run!" hesaid urgentlyas the aura of some demons became noticeable in the room. The group looked at each other, and then Kurama turned to Mihiro, who was now walking the few feet towards them with a painful wince.

"Who is coming?" asked Kurama for the group. Mihiro reached him and grabbed his hand. He looked up at Kurama and stared at him, as if deciding something.

"It's my enemy, Koenma." He stated. Before the group could register this, two of Koenma's demon henchmen entered the room through a portal. They looked at the group with disgust.

"Koenma wishes to see you, spirit detectives," stated one of the demons. Mihiro looked at the group and shook his head.

"You can't go to him, he'll kill you just for helping me, whether you knew who I was or not!" he said. Kurama shook his head.

"We have no choice, he's our boss," he said. He looked at the group and motioned for them to step through the portal. Before he stepped through after the rest of the group, he turned.

"Please stay and watch my apartment while I'm gone. You're still very weak and I'm sure someone cares enough not to want you injured. As for your clothes, I had them washed and repaired for you. Please help your self to anything," said Kurama with a smile. Mihiro nodded solemnly, and waved. Then he quickly pulled out a necklace and tossed it to Kurama.

"If something goes wrong I can be warned. Please wear it so that Koenma doesn't see it. It's important to me," said Mihiro to the redhead. Kurama nodded as he put on the necklace and was gone through the portal, the demon guards close behind them. Mihiro sat down on the bed, looking down at the pyjama's that were probably Kurama's. They were just a blue and white plaid, nothing special. Mihiro breathed in deeply, hoping that the group would be all right.

A child with a pacifier in his mouth paced on a desk in a large office. He was incredibly angry; his secretary, George, had been listening in on his father's conversations for him, and just learned that his father, deciding that the child was a disgrace to the family, had chosen to have one of the Reikai TanTei to be the next king of Reikai. He was unsure as to who, but he could kill all of them if he had to. He could say that they broke their contracts and killed an innocent human, or that they tried to assassinate him. Yusuke did come off to him as either power hungry or blood thirsty; he was incredibly scary. He stopped pacing when a girl holding an oar with blue hair and bubblegum pink eyes came into the office.

"Koenma sir, the Reikai TanTei has arrived. Should I show them in?" asked the bubbly ferry girl.

"No. Let them sit there for an hour and then let them come in," said the demi-god with an evil smirk.

"All right. Anything else, Koenma sir?" asked the bubbly girl with a smile.

"No, there is nothing else Botan. You're dismissed," said the demi-god as he waved her off. Botan politely bowed and stepped out of the room.

"I rock," stated Koenma as he flopped into his leather chair and began working on a Rubik's cube.

"I think Koenma told Botan to leave us out here…," stated Kurama as he looked at the necklace Mihiro gave him. The others grunted in response, utterly bored. The necklace showed two foxes intertwined in a circle of thorns, all in silver with no paint. He tucked it into his shirt so that Koenma wouldn't see it. He didn't know why, but he had a strange feeling that he should do what Mihiro told him. Botan came by again.

"Koenma will see you now," she said as she batted her eyes at Hiei, who was paying no attention. Kurama thanked her and the group walked down the hall towards Koenma's office.

"Why does Botan hit on Hiei so much? Is it because he's small and compact for travel or something? Like a teddy bear?" asked Kuwabara as the group walked down the hallway. He stopped as he felt cold steel against his throat.

"Say anything else and I won't hesitate to kill you, ningen," said Hiei menacingly. Kurama just shook his head and Yusuke snickered loudly. They finally reached Koenma's office, and as Kurama reached to knock on the door, Yusuke pushed past him and shoved it open.

"Koenma! What do you want, you snot nosed brat?" shouted Yusuke as he fell into a chair. Koenma narrowed his eyes at the brute punk; he couldn't wait to be rid of all of them.

"I have brought you here because you have all broken your contracts," stated Koenma calmly. The room was silent for about 2.5 seconds.

"What do you mean, broken the contracts?" yelled Yusuke, who was now standing.

"I haven't done a thing! If anyone actually did do something wrong, it was probably Shorty!" yelled Kuwabara as he stepped back from the desk.

"Don't blame others for your stupidity, baka," stated Hiei as he glared at the baby faced demi-god. Kurama narrowed his eyes, he was glad that he had done what Mihiro told him to do, so if they did need help some form of back up would arrive; it just depended on what kind of help. Koenma smiled and pulled a stone out of his pocket. He closed his eyes and murmured something, then tapped it once. A huge black wind emerged from the marble-thingy, and the Reikai TanTei took their fighting stances. They were surrounded in the darkness and couldn't see a thing. Yusuke could feel himself moving and felt his arms being drawn back so that they were out to the sides. The darkness formed coils around his arms and held him to a cross-shaped pole.

"D-Damn! I can't get free," exclaimed Yusuke as he struggled against the darkness. The darkness evaporated, and he saw that the same thing had occurred with the rest of the Reikai TanTei. Koenma stood in front of the line of struggling detectives. Kurama stopped struggling and looked around, and saw that they were on a cliff above a beach. He could see the waves crashing against the shore and heard the seagulls screeching from above. Kurama looked over at Hiei, who shook his head at the unasked question of, 'Where are we?'

"I'm so glad you noticed where we are. This is the tenth dimension of Reikai. I found a wonderful little marble that can transport me to any dimension. It doesn't even use any of my energy. So I can finally revert back to my other form and not worry about how I'm going to get around," said Koenma as he transformed into his teenage form, yet he still kept the pacifier in his mouth. Yet another lesson in 'Old Habits Die Hard'. Kurama gritted his teeth.

We need help; I don't think he just wants to show us his new toy. As Kurama thought this, the necklace he wore began to glow and beat against his chest.

AKN: Betcha didn't see a prologue coming, huh?

SD's: -shake heads-

Mihiro: Why do I sound like such a wimp?

AKN: -huggles Mihi-chan- Because your innocent and cute.

Mihiro: -blushes- W-well, here are the translations for this chapter...Otoutou means younger brother, kitsune means fox demon, kimono is a type of outfit worn in Japan, mostly by women, ningen means human, Reikai TanTei means Spirit Detectives and...

Hiei: Well? What are you waiting for?

Mihiro: -blushes deeper- Daisuki means I-I love you...

Yusuke: Your so brave Mihiro. -applauds-

AKN: Shut up! Well, please R&R. If I only get a few reviewers, I will thank you personally at the beginning of each chapter!