A/N

~Light~ We don't own InuYasha or Yu Yu Hakusho! A side note! I have very little to do with this story, hence why the fighting between me and the brat have been a minimum...speaking of her...*Goes off to find Akari, who is currently asleep*

~Dark~ We do own Akari (though she denies it) as well as all of our other OCs! I had a bit of trouble righting this chapter due to the fact that I wanted to give as much information as I could without giving everything away and causing the characters to be to OOC. Tell me if I did horrible or good?


To AngelQueen1325 From Dark

Thanks for leaving another review! I'm super glad you've left another review, thanks! I'm hoping this chapter meets up to your standards and that you enjoy it! Thank you again!

To rider300 From Dark

Awesome! I'm ecstatic that you like it! It's actually a lot harder than I thought and after talking to a friend was debating on keeping it a Xover but thanks to you I'm going to let it stay as such. Thank you so much! I hope you enjoy this chapter!


"Wait, what? You need help from-!" I started only to stop mid-sentence when Kagome covered my mouth making me growl slightly in annoyance.

"Why do you need help from them? You said yourself that you were in charge of the Spirit World." Kagome said and I looked up at her and noticed her eyes were narrowed in suspicion and her tone was curious but still cautious.

"You see, it's not that simple. To begin with these demons seem to be targets of an S class demon from one of the lower floors of the Underworld." Koenma said making me frown in confusion, though I hoped it went unnoticed by the people in the room. "Under normal circumstances we would not involve ourselves in such a dispute but in this case we have very little choice." Koenma went on and I looked at Kagome as she fisted the edges of her dress and starred at the screen with worry in her eyes.

"Koenma, what exactly is going on?" Yusuke asked the toddler in a deadly calm voice that surprised me a bit.

"That's a bit harder to explain. About seven hundred years ago, two hundred years before your world was split from their's, Spirit World created a treaty with several strong clans of peaceful demons. The treaty stated that if the demons were ever to be separated from the Human World these clans would remain in the human world and be able to call on the protection of the Spirit World in times of danger as well as vice versa." Koenma explained and I noticed I wasn't the only one frowning at this point.

"But why these clans and why have they called for help?" Kurama asked drawing my attention to him as he lightly rubbed Masaru's ears.

"That is where it becomes more complex, it seems the treaty was originally placed for humans to have a guardian of sorts against some threat but eventually the terms changed and only my father knows the specifics of it. As for the demons calling for help? Well that's not exactly the case, you see in the beginning we sensed a large disruption in the Human World that lasted roughly two and a half weeks before it was reversed and vanished, though from what we have been able to tell many things have changed." Koenma told us and I cocked my head to the side.

"What happened?" I asked before I could stop myself and turned to glare at the boys when they looked at me. "Like you weren't going to ask." I snapped at them before looking at Kagome when she lightly flicked the tip of my ear.

"Behave," she told me lightly and I frowned but nodded at her, deciding to ignore the boys for the most part, or at least try to. "Koenma, why are they being targeted and who is targeting them?" Kagome asked and I could hear the confusion and worry in her voice as she spoke.

"That's the problem. We aren't entirely sure. We didn't even realize the danger until we pinpointed the beginning point of the disruption and found it actually started five hundred years in the past though." Koenma said and I froze and looked at Kagome.

"That's back home...something about all this doesn't fit right." I thought as I turned back to look at Koenma, though in reality I was just looking at the other boys in the room while trying to pull all the information I had together. "Something's missing...What is he leaving out?" I asked myself as I felt my demon stir at my thoughts but otherwise remain silent.

"Five hundred years ago?" I heard Kagome whisper softly and saw her tap her chin in thought out of the corner of my eye. "Koenma, how long ago in months did you find this change?" Kagome asked in a rush and I felt Kuwabara and Yusuke look at us while the other two simply kept to themselves.

"We aren't sure but if we were to guess roughly a month or a month and a half." Koenma said after a moment of silence.

"That's when we fought Kaiken!" I thought in shock and could see that Kagome had made the same connection.

"You said the disruption lasted for two weeks five hundred years ago. What if I told you I possibly know what it was." Kagome spoke making my head snap at her voice as I felt the full on stares of the four boys in the room.

"Then I would ask what you meant by that." Koenma said slowly and I got the distinct impression things were about to change drastically.

`.`.`.`.`.`.`.`.`.`.`

"Hey! Totosai!" InuYasha yelled as he caught sight of the deformed demon petrified and turned into a cave for the old demon. "I know you're here you old bastard." InuYasha said in annoyed tone as he walked by Momo (?) the three eyed bull sitting outside the mouth of the old cave.

"InuYasha, it's been a while." Totosai, an old demon with huge eyes that had tiny pupils wearing large loose fitting clothes that hung off of his thin frame while he hammered at something in his forge with his extra long hammer. "I hope you've been taking care of Tetsusiaga." He said in his old voice.

"Whatever old man, I just came to see if you knew anything about the techniques of the Kuro Clan." InuYasha told the man, leaning against the side wall and watching as Totosai worked on something.

"Master InuYasha! M'Lord, it's been to long!" Myoga, a small flea demon known for his cowardliness, cried joyful while jumping up and latching onto InuYasha's cheek, drinking some blood before being squished by said 'Lord'. "Squashed again," Myoga said weakly before popping back up.

"Anyway, you know anything?" InuYasha asked, completely ignoring Myoga.

"I don't know, the Kuro Clan were not big mouths or friendly." Totosai said after a minute earning a punch on the head from InuYasha.

"I didn't ask for gossip, Old Man! I asked to know what they could do with their yokia!" InuYasha yelled angrily and blinked in surprise when Myoga popped up to his shoulder to answer him.

"That's just it Master InuYasha, the Kuro Clan were very secretive about their techniques. We know next to nothing about them." Myoga explained while Totosai nursed the bump on his head. "Not even your Father, Lord Inutaishou, knew very much about them." Myoga added with a respectful bow that went mostly unnoticed by InuYasha.

"So you're as clueless as the rest of us." InuYasha muttered with a scowl as he glared at the fire.

"My apologies, Master InuYasha." Myoga said from his perch.

"You seem worried." Totosai stated after a minute of silence broken only by the crackle of flames and the sound of his hammer hitting metal.

"You've got no idea," InuYasha muttered and looked towards the exit as if something had gotten his attention. "What do you know about a new mercenary traveling around?" InuYasha asked after a minute, his attention remaining on the outside of the cave.

"A mercenary?" Totosai questioned as a strange breeze passed into the cave.

"Yeah, seems like he's looking for me and my pack." InuYasha said calmly his eyes now on Totosai.

"That would be a mistake," a new voice spoke calmly from outside of the cave as the wind shifted again and a young human man appeared at the mouth of the cave. The man had a short military crew cut that made his hair nearly invisible and wore an olive green t-shirt with a camo jacket wrapped around his waist with matching fatigues and tan combat boots. "You see I'm not so much as looking for you as much as I am looking for something you have." The man grinned, looking feral as he looked at InuYasha with a hunger in his eyes.

"Who are you and what do you mean by that?" InuYasha growled while grabbing onto the hilt of Tetsusiaga.

"I'd be careful Doggy Boy," the man said with a laugh as he held out his hands and looked around the cave. "This place isn't big enough for any of your attacks, and hand to hand combat is something I'm good at." The man said, making InuYasha growl but slowly release his hold on his sword.

"Now, as for who am I? Well last I checked I was a soldier in the U.S. Army, but things change. My name's Tim, Timothy McVeigh* and as for what I meant, well that's on a need to know basis." The soldier said and held his arms out to the sides with his palms facing towards a growling InuYasha, giving the universal sign for 'I'm defenseless but come at me.'

`.`.`.`.`.`.`.`.`.`.`.`

"As a human you have no right to know anything about this mission, neither does the half demon child beside you." Koenma said slowly as he looked over at me and I glared and showed him my claws.

"Who you calling a pup, Toddler? I'm way bigger than you!" I growled at him and froze with my eyes wide as Kagome sighed and pulled me up onto her lap. "H-hey!" I yelled in surprise while Yusuke and his team smiled and/or laughed at me. "Shut up!" I snapped at them and tried to get up only to have Kagome rest a hand on my shoulder while the other moved to my ears.

"Koenma, you may be in charge where you are but from where I come from my mate and I are in charge, so believe me when I say we have every right to know about this mission." Kagome said and I stuck my tongue out at the toddler as he sputtered for a response.

"She told you!" Yusuke said while laughing loudly while I let myself relax slightly against Kagome as she continued to rub my ears.

"What is up with you today?" My demon spoke up as I smirked at the toddler trapped in the tiny space.

"Shut up," I told her in response and focused back on the conversation.

"Just who are you!" Koenma demanded after a minute, his eyes open and starring at Kagome with a hard glint in them.

"I'm the mate of InuYasha and the Shikon Maiden Kagome Higurashi. I helped defeat Naraku five hundred years in the past and live there with my mate and our three pups." Kagome told him and I tensed and absently dug my claws into Kagome legs as the room went silent.

"Y-you?!" Koenma sputtered at the same time as Yusuke looked at us in shock.

"Now wait a minute! You're telling me you traveled back in time?" Yusuke asked in disbelief while I watched the toddler talk to a blue ogre, saying something about files and someone named Botan.

"Basically," Kagome said with a shrug and I couldn't help the sigh that escaped me when she rubbed the base of my ear. "But that's a story for some other time. Now back to Koenma and your assignment. Why is this so important?" Kagome asked making the toddler jump slightly as he returned his attention back to us.

`.`.`.`.`.`.`.`.`.`.`

"Well I just found out I'm on that need to know crap, so start talking!" InuYasha snapped angrily at the newcomer while Myoga and Totosai retreated to the far back of the cave. Tim smirked and let a foot slid back as he brought up his fists, the hunger in his eyes reminding InuYasha of weaker demons driven solely by their instincts.

"What do you know Mutt, I'm feeling awful talkative today." Tim said as both men glared at each other. "You see my Liege is looking for something. Something you have and I've come to retrieve it." Tim told InuYasha and laughed when InuYasha returned his hold on Tetsusiaga, as if he were going to take it. "Oh don't bother! I'm not after that hunk of rust. You see, what I'm after is something far more important." He said and licked his lips quickly, revealing small fangs that cut his lip and drew blood.

"Bastard! You're dancing around like this makes me wonder if you even know what you want." InuYasha snarled and choose that moment to race forward, vanishing from sight as he did. Tim's eyes widened slightly in surprise before dilating as InuYasha tackled him around his middle, sending them both flying out of the cave. As soon as they were out of range of the opening of the cave InuYasha let Tim go and stopped running, allowing the man's momentum to send him further while InuYasha, himself, jumped back to watch him.

"Very good! But it won't happen again!" Tim said while standing up and wiping his mouth. "Unlike most humans, I'm what you would call a special case. I'm human, but I have enough demon in me so that if you want to hurt me you'll have to use your full strength." Tim said and ran at InuYasha with something shiny wrapped around his knuckles. InuYasha was quick to dodge but even he didn't see the low blow the former soldier landed on him until to late. InuYasha gasped and folded over as he was kneed in between his legs and sent to the ground.

"That's a...dirty..." InuYasha panted only to eat molten rock when Tim forced InuYasha's face down into the ground with his boot.

"A dirty trick? Well yeah! It's the best way to fight. You see unlike those stupid humans that were in the Army with me, I refused to bow to their honor code." Tim said, a twisted smile on his face as he ground InuYasha's head into the ground with a look of twisted delight on his face. "You see, the only way to live in the world and win is to fight dirty! And that means low blows!" Tim yelled and drove his metal covered knuckles into the base of InuYasha's spine, hearing a loud crack as the hanyo screamed in pain.

"Now tell me," Tim said grabbing InuYasha's ears and pulling him up off the ground. "Where is that pretty little mate of yours and those pups? I'm kind of hungry if you know what I mean." Tim said and started to laugh at the sight of utter rage, disgust, and horror on InuYasha's bloody and slightly burned face.

"Oh now he's gone and done it." Totosai said lowly from his perch atop Momo, while Myoga looked down on the fight. "If this doesn't release InuYasha's inner demon then nothing will." Totosai said as Momo hovered high above the ground.

Tim meanwhile, was still laughing and had yet to notice the red bleed into InuYasha's eyes or sense the massive amount of demon energy leaking off of the hanyo as his demon blood nit and repaired InuYasha's body.

"You filthy bastard!" InuYasha roared and swung his claws out at Tim's exposed stomach. The former soldier was barely able to jump back in time to avoid the blow that would have sliced him in half, instead it only cut him deep enough to expose parts of his organs.

"I see, so this is the inner demon I was warned of." Tim said to himself as he watched InuYasha stand up and glare at him before licking his claws, which were covered in blood. "What a wonderful surprise." Tim said and yelled loudly in joy as he ran at InuYasha, who in turn ran at him.

"Now I can really enjoy myself!" Tim yelled as his fist swung to meet InuYasha face while InuYasha's claws raced to slice the man to ribbons. Suddenly, both opponents vanished from view before appearing a second later standing perfectly still with their back to one another.

"It seems we both need to become stronger." Tim said in a light voice as if discussing the weather as blood spurted out from him and first his arm, then stomach fell apart and hit the ground. "Till next time," he said and vanished in a swirl of darkness while InuYasha's eyes returned to normal just as blood poured down his face like a faucet and he collapsed to the ground.

"Master InuYasha!" Myoga yelled as blood pooled around the mans' head, staining his white hair crimson.

`.`.`.`.`.`.`.`.`.`.`.`

"Setsuna," Sesshoumaru greeted as he watched the pale demon and his companion approach.

"Lord Sesshoumaru," Setsuna responded while Riku mew'ed loudly and bowed his head slightly.

"Come, we have much to discuss." Sesshoumaru said and led the way to his study, which had grown a bit since InuYasha had left. "I wish to know everything about the remaining members of the Kuro Clan." Sesshoumaru commanded as Setsuna closed the sliding door and watched the dog demon sit down behind his desk.

"Why would you need to know something like that?" Setsuna asked curiously while plucking up a scroll and ignoring the glare coming from Sesshoumaru.

"I have no reason to tell you." Sesshoumaru said coldly, his eyes narrowed dangerously.

"I bet I know what it is," Setsuna said in a knowing voice as he smirked and tossed the scroll to Sesshoumaru, who caught it with ease. "You want to know about the scandal and gossip surrounding Kaiken, don't you." Setsuna said with a joking air that made Sesshoumaru groan lowly and face palm himself gently.

"You have not changed at all." Sesshoumaru said in a tone of boredom and disbelief as his companion smirked and sat back on his cushion.

"Nope!" Setsuna said before a specific scroll caught his eye. "Let me see that." He said calmly, pointing at the scroll that Sesshoumaru had been puzzling over for quiet some time.

"Why?" Sesshoumaru asked while pulling the scroll out of Setsuna's reach with a suspicious look.

"Because Kaiken always kept it to himself and never let anyone else see it. Not even that stupid hag he called a mistress." Setsuna said as if it were obvious. "Besides, I've still got at least seven more lives if it kills me." He added and after a moment's deliberation Sesshoumaru slowly passed the scroll to Setsuna.

Sesshoumaru watched Setsuna's face while doing his paperwork. Keeping his curiosity hidden as he worked, waiting for Setsuna to break the silence first.

"Sesshoumaru, I assume you have majority, if not all of Kaiken's scrolls, so I need to see all the scrolls with red, blue, and black coloring on the outside of them. Kaiken was always looking at them whenever he had this scroll in his hands." Setsuna said calmly, while laying the scroll down on the desk.

"Do you know something?" Sesshoumaru asked calmly as Setsuna got up and walked over to the boxes holding Kaiken's scrolls.

"I don't know, but then again I could be wrong." Setsuna said as he dug through the boxes. Both demons worked late into the night, both carefully going through scroll after scroll in an attempt to figure out the warning on the scroll that had puzzled Sesshoumaru for over a month.

`.`.`.`.`.`.`.`.`.`.`.`.`.`.`.`.`

1.) Timothy McVeigh was a real life soldier who turned killer. He was convicted of the Oklahoma City bombing that killed 168 people and wounded more than 600 others. He was sentenced to death by injection in 2001.