Hello there everyone! This would be my first fanfiction on here. lol. I am using Shadowblade-tara's Blood Brother AU idea. She's such an amazing author, you really need to go read her fics.

This fanfiction takes place after series. Each chapter will have a flashback to a moment in the series. All lines during those flashbacks are taken directly from the manga, except the added in blood brother lines. So basically, the flashbacks are the same scenes in the manga, just in either Kurama or Hiei's blood brother point of view.

Disclaimer: Kurama and Hiei both belong to Yoshihiro Togashi. If they were mine, the whole series would be about them. LOL. All other characters belong to him too.

Blood Brothers

Chapter 1

"A brother is so much more than any dictionary can define. Most people think of a brother as simply a male that you share your parents, or one of your parents with. Oh how they are wrong. Being a brother means so much more. He is someone who is loyal to you, someone you can trust your life with. When you feel like you've done something stupid, he's someone who will agree with you, but laugh with you about it instead of at you. He is someone who will comfort you in times of need and he's someone you can always depend on. Such is the true definition of a brother. Blood Brothers on the other hand... are even more than that..."

A young male at about the age of nineteen sat at his desk in his office. He had long red hair that most girls would be jealous of. His physique clearly stated that he worked out, and you could define him as the obvious 'pretty boy'. His posture stated that he was quite mature for his age, if only everyone knew how true that was. His emerald eyes scanned the paperwork spread across his desk. He only had a few more hours of work left before he could take off for the weekend. He hadn't seen his old friends in quite some time, and they had a small party planned as a reunion of sorts. He sighed as he leaned back in his chair, his pen underneath his nose, and being held up by his upper lip. Why couldn't he seem to concentrate? He knew the consequences of not finishing on time, and yet he couldn't seem to get to work. A small tapping on his window reminded him of just why he couldn't concentrate. He smiled as he looked over and saw his brother waiting patiently for him to open the window and let him in. He took the pen and set it on his desk as he stood up and walked over to the window, opening it up. As soon as he did that, the blur of black moved from outside on a branch, to sitting on his bed. His brother had his typical scowl on his face. "It took you long enough fox. I had assumed you would sense my energy and have the window already unlocked."

Kurama smiled sheepishly. "My apologies Hiei. I've been caught up in some office work and my mind has been wondering." He took a moment to look over his brother. Nothing had changed in the couple years he hadn't seen him. He was still short, just like Kurama knew he always would be. His hair still defied gravity, and he still adorned himself in black. The only difference was the two hiruseki birth stones he had around his neck. Kurama smiled inwardly. He had finally found his birth stone. That was good.

Hiei simply crossed his arms and let out a mumbled, "Hn".

Kurama walked back over to his desk and sat down in his office chair, crossing his legs as usual. "What brings you here today? I assume you're not here to attend the reunion scheduled for tomorrow."

Hiei gave him a 'what do you think' look as he scowled and turned away. "Mukuro gave me some time off." he stated bluntly. He wouldn't go into detail if he didn't have to. Typical Hiei.

Kurama nodded. "Naturally." He smiled to himself and Hiei caught a glimpse of his old mischievous Youko smile. He lifted an eyebrow at him.

Kurama turned in his chair to face his paperwork, so that his back was facing Hiei. "Do tell me Hiei, how is Mukuro doing these days?"

Hiei narrowed his eyes at him. "I don't see why you would care." He was up to something...

Kurama only smirked to himself. "Oh that's not true at all brother. Of course I care about my future sister-in-law... that is if she isn't already my sister-in-law."

Hiei glared at him. "Hn. I've no idea what you're talking about fox."

Kurama turned around to face him, giving him an 'I know you all too well' look. "Yes you do."

Hiei simply crossed his arms and leaned up against the wall, turning his head. "Hn. Mukuro is fine. That is all you need to know."

Kurama rolled his eyes. "Yes, of course. I know it's natural of you to close off relations with sisters Hiei, but I do wish to get to know my sister, even if her mate is unwilling."

Hiei glared at him. "How in the three worlds did you know we were mates?"

Kurama lightly shrugged, showing that he was still playing with the short youkai. "Oh, you smell different, that is all."

Hiei mumbled something under his breath but all Kurama was able to catch was, "baka kitsune".

Kurama smiled in victory as he turned back to his paperwork. He really did need to finish it, or he wouldn't be able to attend the party tomorrow. A few moments of comfortable silence went by before Hiei said anything. "What are you doing fox?"

Kurama glanced back at him and then turned back to his paperwork, to show that he was listening. "I'm doing some paperwork for Father. I need to finish it before tomorrow or I'll have to skip the party."

Hiei shrugged. "I don't see why you even want to go in the first place. Just a bunch of stupid humans getting together."

Kurama smiled. "Hiei, those stupid humans are our friends, and you know exactly why I want to go. I havn't seen them in quite some time." He paused for a moment. "You should come along. It's been even longer since you've seen them."

Hiei let out a huff. "That's because they're all idiots."

Kurama looked back at him with an eyebrow raised. "Even Yukina? She'll be there as well."

Hiei narrowed his eyes and turned his head. "Hn."

Kurama shook his head. Hiei still hadn't told Yukina who he was to her. Though, Kurama had a sinking suspicion she knew. She may have been an innocent girl, but she certainly wasn't stupid. He smiled as he set his pen down and turned to Hiei. "It's settled. You'll accompany me tomorrow to the reunion."

Hiei gave him a pointed look. "I will not."

Kurama nodded. "Of course you will Hiei. Just think of the pained look on your dear sister's face when she finds out that you once again did not come to the reunion she spent so much time planning for us all."

Hiei only glared at him. "That's low fox. Even for you."

Kurama smiled in victory once more. "I'll take that as a yes." he said as he turned back around in his chair to continue his paperwork. More comfortable silence went by before it was broken. This time, by Kurama. "Besides Hiei... don't you miss the old days?"

Hiei raised an eyebrow at him. "Which ones?"

Kurama let out a chuckle as he turned around to face him. "You know, back when we did missions with Yusuke. When we aided him as Spirit Detectives."

Hiei narrowed his eyes at him. "No. I'm quite pleased that my babysitting days are over."

Kurama nodded, seemingly in thought. "Perhaps it is just me. Life has calmed down quite a bit here in human world. I understand that Makai is getting ready for it's next tournament, but I've decided not to participate. Yusuke is leaving the day after tomorrow." he glanced up at him. "Will you be participating?"

Hiei shook his head. "No, I've no interest in ruling Makai. As long as an idiot doesn't win and change everything...."

Kurama chuckled. "I believe if Yusuke did manage to win, he'd keep things the same as Enki has."

Hiei nodded. "I suppose you're right. I don't believe the idiot detective would know how to change a government anyway."

Kurama nodded. "Yes. He has always been the go-with-the-flow type, hasn't he?"

Hiei snorted. "If you mean the lets-just-see-what-happens-even-if-I-die type, then yes, he has."

Kurama smiled at the thought. "If I remember correctly, that is exactly how he defeated you, back when we stole the artifacts from Spirit World."

Hiei shrugged. "Hn. I still say that without your help the idiot wouldn't have defeated me."

Kurama smiled. "You know that I only temporarily blinded you. With our bond, I couldn't do much more than that."

Hiei glared at him. "Hn. Do not forget the stomach wound you had me inflict upon you. That pain certainly wasn't needed while facing the detective."

Kurama smiled innocently. "What ever do you mean?"

Hiei recalled the memory all too clearly. He had the detective in his grasp. Keiko was almost a demon. There was no way Botan could have stopped it with his demon energy so high. He had all three artifacts, and the only thing left to do was end the miserable human's life. He had Yusuke bound by his Jagan Eye. All that was left was to stab the detective with his sword, and his life was over.

Hiei smirked as he held the sword in a striking pose, ready for the kill. "As a human though, you're creditable for your powers. To show my respect, I'll give you a clean death!" He lunged at the detective as he yelled "Die!" Before he knew what was happening, he felt a familiar presence. Only one person in the world gave him that feeling, and his eyes widened as he felt a tremendous pain in his stomach. He looked up at Kurama in disbelief. "Wh-what!? Kurama! You...!? What's the meaning of this?" Too many thoughts swirled in his head. Kurama was here. He just stabbed Kurama in the stomach. Due to that, he had a similar wound on his stomach, just without the puncture. Before he could finish any more thoughts, Kurama had swung blood from his hand into Hiei's eyes, mainly his Jagan. He jumped back as he grabbed his face. "My... eye!!" He didn't hear much of what the fox and the detective were talking about. He caught a bit of it though. Something about Kurama owing the detective a favour. What kind of favour could the fox owe to the detective that would make him go against him like this!?

Hiei had finally cleared his Jagan of enough blood to see out of it, though it still pained him. He knew Kurama felt this pain as well, and was probably suffering from a major headache along with that stomach wound. "Kurama! You traitor! I won't spare you! I'll kill you!" He knew he had yelled that out of anger, and he also knew that the fox wouldn't take him seriously. After all... if he had killed Kurama, he'd basically be killing himself. His train of thought was interrupted by the detective saying something about his opponent. Hiei was so mad that he charged the detective. With Kurama here and bleeding, his plans were shot. He decided that he should properly thank Kurama via their constant mind link.

~Kurama you idiot! What the heck were you thinking!?~

Kurama's eyes widened as he glanced over to where Hiei was. He was charging the detective with his full strength. ~You mustn't kill that human Hiei.~

Hiei narrowed his eyes. ~And why not!? I have every right to! He's a detective for Spirit World!~

Kurama shook his head. ~No. He saved my life, and by doing so he saved yours. You owe him.~

Hiei glared at the detective in front of him. How could that be? He leaves Kurama alone for just one day and the fox gets his life saved by a human!? "All my powers now! I'm going to kill you!" Hiei attacked the detective in an onslaught of punches. He laughed at the stupid human trying to run away from him. "Don't you run away!" Right as he caught up with the detective and was about to send him the final blow to knock his petty mind into unconsciousness, the human shot out his right index finger towards Hiei, spirit energy emitting from it.

Kurama's eyes widened. ~Hiei dodge that! It's more powerful than it appears!~

Hiei's eyes widened as well and he quickly made use of his speed as he dodged the bullet just in time. Kurama was right. That was a powerful blast. How was a mere human capable of wielding such a trump card? Hiei stood up straight as he looked over to the shocked detective. He obviously couldn't believe that he had dodged the attack. "What a surprising guy... I never thought you'd have such a move. But you seem to have released all your Rei powers in that one shot." He watched the detective slide himself against the wall and sit down, obviously exhausted. "If we had fought a little later, perhaps I would really be the one killed!"

Kurama glanced over to the two. ~Hiei, you need to knock him out now. You're weakening. If you do not hurry, the human girl's life will be at risk for real.~

Hiei narrowed his eyes. ~You act as if I care fox.~

Kurama narrowed his eyes right back. ~For both our sakes, you had best care.~

Hiei scowled as he looked upon the defeated detective. "Still embarrassing yourself now? No matter how you struggle, you'll never win!" He watched in silence as the detective didn't move. He smirked as he powered demon energy into his fist. "I'll send the three of them after you! So rest in peace and die!"

Kurama's eyes widened as he watched what was about to happen. He couldn't possibly move in time! ~Hiei! Move now!~

Hiei narrowed his eyes. ~What are you talk-~ He was cut off by a giant burning pain on his back. "What..?" He coughed up blood as he hit his knees. "Who...?" He looked over to where the blast had come from and found the dark mirror... shattered. "The dark mirror!?"

Kurama nodded weakly. ~Yes... Yusuke shot his Spirit Gun and it reflected off of the dark mirror and onto your back...~ His voice sounded weak, the blast obviously having its effects on Kurama as well.

Hiei's eyes widened. ~He made it reflect...~ He looked at the detective. "You've calculated my escaping that move when you fired the shot?" He listened to the detective's stupid explanation. Honestly, what was Spirit World thinking when they hired this fool? "You..." He felt himself slowly losing consciousness. This wasn't the plan. ~Kurama...~ This wasn't how it was supposed to happen.. "idiot..." His world went black as he hit the ground.

Hiei scowled at the innocent smile Kurama had plastered to his face. "Hn. Next thing I knew I woke up in Spirit World prison."

Kurama nodded. "Yes, but due to some amazing charismatic people skills on my part, I convinced Koenma to pardon you."

Hiei only glared at him. "It was your fault that the plan didn't work in the first place. Go in. Get the treasures. Kill the detective. Leave."

Kurama pouted at him. "Oh don't blame me Hiei. My mother was dieing. What else was I supposed to do?"

Hiei rolled his eyes at him. "Hn. How about not risk both our lives only to owe that pathetic detective a favour."

Kurama smiled. "All is well, it turned out for the better, didn't it?"

Hiei snorted as he looked out the window. "I'm not entirely sure about that. I still think that the oaf's stupidity is contagious, and that he's rubbed off on you a bit."

Kurama smiled knowingly at his friend. "Whatever you say Hiei."

To be continued. ^_^