~Author's Note~

This had been on my mind lately and I found that there weren't many Aokuro fics or GENxKuroko fics in FFn, most of them weren't really long or are just oneshots or drabbles. They mostly comprised on friendship and not too many romance rated.

Also I've been watching Ao No Exorcist and this idea just lit up a bulb in my head. Literally lit up and my inspiration grew a little. I thought up of the fantasy and then went on to the Kuroko no Basuke crossover archive and I found nothing!

Only ONE!

Just ONE Blue Exorcist/KnB crossover!

And so this became the result.

The FIRST ENGLISH BE/KnB crossover!

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Chapter 1: Flaming Flashbacks

"TETSUYA! RUN!" the woman screamed, pushing him to the back and facing their pursuers, men dressed in typical black suits and sunglasses covering half of their identity. He began to falter in his pace but then one of the men managed to wrestle through and began running after him.

He frantically stumbled and ran as fast as he could but he knew it was impossible, the man was bigger and faster after all. Before long, he felt his neck prickling in warning as a huge shadow loomed over him. In a moment of hysteria, he tripped and scraped against the cold hard floor of the long hallways.

"TETSUYA!" came the cry of rage.

The man in pursuit of him was a good long ways away from him than earlier. It was a chance to run but he found that he couldn't. Only pain reminded him that he was defenceless against the huge hulk shadowing his trembling body, he couldn't move and even if he wanted to, he doubted that he'd make it far before they catch him again.

"NO! LEAVE MY SON OUT OF THIS!" the woman screamed in the grip of two men holding her arms, making her thrash about wildly and managed to hit their chests, but they didn't seem to react. They stood still and took all the blows without sound, the only reaction that they felt extreme pain was when she kicked their knees with her feet and in retaliation, they squeezed her arms with force. It made her wince and she finally lay limp, exhausted.

"Kuroko Tetsuya" he heard the man looming above him gruffly speak, voice low and somewhat tired. He was really tired, too tired to even try and fight back but he could vaguely hear his mother calling his name desperately, the sounds of men grunting in pain along with dull thuds of flesh being beaten.

"Tetsuya, don't sleep!" she hissed while clawing her nails on the wrists of her captors, relishing in silence at the groans and pained hisses she caused.

'Sorry…can't…mother…It's spinning…' he thought, seeing the ceiling and surroundings go disoriented.

He knew he was going to faint, it felt like his head was being split into two. But instead of the black abyss he knew he was going to be acquainted with, he felt a searing heat and what seemed to be a thousand voices that combined to form a single shrilling scream that nearly made him go deaf.

So startled by the scream, he gasped and force his eyes to open; only to gape at the mysterious sight that made him speechless. By then he couldn't even be surprised anymore, not at all and all he felt was amazement at the flickering flames that consumed those men.

But then he hesitated.

"Mother…?"

Blue flames erupted. He could vaguely hear screaming, this time was different. The screams came from upstairs and they all had voices that varied their ages, he could tell. By now, fear had crept up and tingled his spine once more but first he had to find his mother, he couldn't leave her here. She was the only thing that mattered now, not even his father.

His eyes teared up at the thought of his father.

'I've never thought of Papa…I don't even know who Papa is…. I… Don't… Know…Who… Papa… Is?' his thoughts turned into horror.

He didn't know who his own father is!?

"Wait…this isn't the time!" he muttered angrily and quickly gathered himself, dusting the dirt off his ruined beige shorts before darting his eyes around, frantically searching for a spot of bright grey hair.

His eyes zoomed on one of the men that managed to escape the flames and he finally saw a flash of bright grey, arms tangled in one of the goons and trying to punch the living daylights out of them. She managed to throw off the one that had latched onto her neck, strangling her, by kicking him backwards.

He ran and was about to reach her, when she spotted him and hissed out at him to turn tail and run from them. Terrified, he faltered and stood still at the scene. But that didn't stop her from glaring at him with molten emerald eyes and grey hair dark from being matted by sweat and blood from fighting.

"Mom..?"

"RUN! DON'T HESITATE! JUST RUN!" screaming, she reared back her fist and punched the blonde goon to the left of her; rendering him breathless and unconscious.

She had to make him run….. She had to do it… Because he can't meet that man yet! Not yet! He would take him away from her and she didn't want to! Father Fujimoto would take him away from her!

"AAAAAAAAAAAAARRRRRRRRRRRHHHHHHHHHHHHHH!"

"What the hell is that!" one of the men yelled, terrified.

"I don't know!"

"Now that I think about it… Why are these flames blue!?" horror laced the gruffness in the voice.

"The Akuma… SATAN is here!" a cowardly looking thug sobbed and slowly slid to his knees, clutching his prayer beads helplessly.

"OI! That fucker wouldn't be able to enter Assiah! Shut up and stop praying, Goro!" the blonde, that got thrown earlier, stuttered out.

"That's right..."

"G-goro?"

"….."

"Oi GORO!"

"….Ehe"

"WHAT THE FUCK'S WRONG WITH YOU!?" fist reared back, the blonde punched the kneeling coward's cheek with force and sent him flying to the other side of wall. He landed with a dull thud but didn't make a move to punch him back.

Goro laid still.

"OI GORO! STOP JOKING AND GET THE HELL UP!" he was seriously terrified now. The Goro he knew wouldn't take the beating in stride even if he was a coward and they usually fought when pain was inflicted. Right now, he was doing neither; simply laying like dead weight against the barren mouldy floor.

The silence was killing him and he could feel his instincts screaming at him to run away from this man. This man wasn't Goro. He wasn't his best friend.

His instincts were proven right when Goro suddenly propelled forwards from the wall, now standing upright and fumbling around as if he was going to faint. He was ready to run over to Goro if he really fainted, regardless of his inner turmoil.

All thoughts were thrown out when Goro stopped swaying with his back facing him. He saw Goro peer at him with his eyes while his front body was still facing the wall.

What he saw made his body go cold and his nerves haywire while screaming danger at their host.

Because he saw red eyes.

Flaming red eyes.

Red eyes filled with mockery and insanity.

"BURN BRIGHT, MY FLAMES!" Goro hissed and the blonde man screamed as realization dawned on him; the gates of Gehenna were opened. And that could only mean that Satan was out here, with them, and hordes of Akuma were probably out there with their King, sabotaging the temple.

"G-goro?"the blonde man whimpered. His eyes widened as Goro slowly turned around to face him; only to be met with a hideous face mangled to the point it was unrecognizable. He screamed even louder but it only bordered for Goro to cackle loudly and insanely at his terror, mocking his fear for the King of Gehenna.

"What's wrong, Murashi? Don't tell me you're afraid of your dear old friend Goro? Now are you?" the demon possessing Goro sneered at the frightened blonde, taking steps towards him in a slow predatory pace.

"DON'T COME NEAR ME! MONSTER!" Murashi sobbed hysterically.

Tetsuya watched the scene without any hint of fear but he could feel the borderline insanity that Murashi was going to cross as he feared for his own life. He didn't understand why Murashi was afraid. He really couldn't. The man made flames appear and they were blue, he had never seen blue flames before.

Shouldn't Murashi be happy?

Since the man made flames burn around the whole place, that meant that he was a magician right?

Magicians were supposed to make people happy right?

So why was Murashi scared?

He was supposed to be happy.

"TETSUYA!" the scream snapped him out of his reverie and he turned to look at the left where his mother was, only to be met with something entirely different and terrifying for others. Thing was, he was more amazed than terrified at the huge glob that was Goro minutes ago and didn't hear the screams of his mother or the other goons trying to get their victim off from the crazed beast in human's skin.

"Well, who do we have here?" the 'thing' sneered at the young boy. Tetsuya simply stared at the monster that Murashi had screamed at minutes ago with nothing apparent in his eyes, the usual blankness in his sky blue eyes. The little boy contemplated whether to answer the thing or just run away as his mother is screaming at him to do but he wanted to know why. And so curiosity won over, his lips moved and his voice clearly projected; he spoke without fear in his voice and neither was he angry at the thing, unlike his mother and the thugs.

He was simply curious.

Little did he know; he had cast open a curse for himself at that very moment.

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*Satan's POV

He grinned mercilessly to himself at the look of horror painted on the blonde, Murashi's, face. He didn't expect to come across a greedy bunch of humans at the bottom of the wretched temple but this was more than he expected; they had corrupted souls begging to be devoured by him. The monks he had set his beautiful flames on were too foolish and naïve, filled with prophecies of God and his teachings.

Bah! His teachings were worthless!

If He had actually passed the knowledge down to these idiotic beings, then they would've been more entertaining than toddlers that grew up from preschool but they were fun to break nonetheless. He remembered the stupid chanting they had so desperately said, then the agonized screams that followed after.

He shivered in bliss.

'It was truly worth it for going out of the way to save Yuri'

"Yuri… I almost forgot about her "he muttered quietly before a maddening cackle ripped out from his throat, raw and hoarse. The filthy humans yelped and screamed louder in terror, making him stretch his grin even wider than possible. Humans were truly the best entertainment! Their screams were delicious and the more terrified they felt the more his meal was going to be tasty! But he had to be quick. The monks that threatened Yuri may have already been burned by his flames but there's no telling who was left to finish the job. He couldn't help it, there's so many to devour here!

"HAHAHHHHHAAHHAHA! YOU HUMANS ARE SO AMUSING! I CAN'T HELP BUT TEASE YOU LITTLE FOOLS!" his cackle grew louder and the blonde was beyond terrified.

"Y-you! I'm not afraid of you!" Murashi hissed.

"Is that so? Well, come at me then! If you can kill me!" he laughed.

Murashi became enraged and pulled a stack of ofudas from beneath his black suit, words written in strange old Latin and Japanese kanji mixed together on the black ink of calligraphy. He reached beneath his white undershirt and caught the unmistakeable feel of round wooden beads and the faint smell of old wood along with myrrh. Releasing quick but short breaths of nervousness, he called on his courage.

"You, who had let the evil touch your skin, duplicate your very existence, became the host of the Devil himself, merge your souls together and soil the very place where God had so moulded you from his own body, let Heaven wash your skin and peel it to reveal yourself!" he barked.

Satan felt the familiar prickling of the spell but it didn't hurt him; almost nothing ever does. It only made his host's skin burn but that was it, he can never be harmed. But he screamed nonetheless, opting to play with this human longer because this man was more amusing than the other spineless fools that quivered from his very appearance.

Murashi, unknown of the current monster's motives, smirked to himself when he saw that his chanting was working and felt giddy when he thought of a high possibility; he'd be able to rid of the world's number one filth, Satan. So blinded by the thought of him becoming famous, being worshipped and gaining power along with the riches he dreamt of, he didn't notice the oncoming attack being descended upon him.

Satan smirked to himself when he saw the blonde human's expression turn enraged but slowly it changed to thoughtful, realization, dazed and then finally a greedy looking expression settled itself onto the blonde fool, it made him annoyed and his ruined black lips pulled into a frown.

"FUCK! YOU DIDN'T EVEN LAST A MINUTE!" he snarled, disgusted and lips pulled back to release the awful sound. Satisfaction marred his charred face when the disgusting blonde didn't hear his prior frustrated scream and when he wretched his claws to slash down the dazed idiot, bliss erupted his being in finding out that his victim wasn't able to make a single sound when his hands tore him to half.

Licking his tainted human nails covered in blood, he quietly huffed and decided that he didn't want to play with these filthy broken toys anymore. He didn't have anyone to deal with anymore since Murashi had wasted his time and now that he had cut down the man, he doubted that there would be another as entertaining as the dead man. But then it happened.

A small tingling called to his right and he quickly turned to it, not wanting to miss this rare moment. At first he didn't see it, but when the woman with grey hair and green eyes had screamed out a name with her eyes pointed to a certain direction, was then did he see it.

A little boy.

He looked no more than five years old with his sky blue hair dark from sweat and blue eyes turned to the direction of the woman, lips in a balanced line, white plain shirt bathed in sweat and ruined beige shorts along with worn out looking black sneakers. He didn't see the point of why his demon side was telling him to touch the boy and turn him to face them but then the boy's head snapped up to his direction.

The boy stared at him in surprise and he felt the sudden urge to release his flames on the boy, but for what reason? Though many had not known this, his flames were always released for a reason he had comprised and they were always used to burn his enemies or out of sheer boredom. Now his flames were trying to make a little boy burn out of existence and he would not have that. He wasn't that cruel to kill a being that had only stayed on Assiah soil for a mere five years and even if he did, Yuri would kill him; not that she could once she passed through the gates of Heaven.

But Yuri aside, he was curious. The boy was hard to decipher, his eyes blank and stared at him as if he could pierce through his very soul. And he looked familiar too… But where? Ah, the young lad's eyes.

They were the colour of his flames.

Curiosity won and he sneered at the standing still boy.

"Well, who do we have here?" he sneered. The boy seemed to take turns between looking at his mother and then back to him but what surprised the demon was that there was confusion in his eyes. He knew that while they were still children, they still could tell danger from their senses. So what was the boy confused about? Eager for an answer, he opened to curse out another haughty remark but a soft steady voice interrupted him.

"Can I touch your flames?" the boy asked and he felt his body go rigid in shock.

He wanted to touch his flames? Is the boy crazy!? His flames would burn his very existence out like a candle light! Hadn't these humans taught their pups that flames, no matter if it's his, were dangerous and a threat to their easily pierced skin? This child must be mad! No child asks him whether they could touch his flames and not get hurt!

"Are you stupid? Do you want to get hurt?" He asked gruffly, the child shaked his head in denial.

"No, Mister" he spoke politely.

Good Gehenna, he even spoke politely! To the King of Demons no less!

His amusement was too much!

"BWAHAHAHAHA!GYAHAHAHAHAH!" he boomed out loud, making ants crawl up their audiences' skin.

"How amusing are you!" he asked to the little boy and he could see irritation bubble up in the boy's blank features.

"Can I touch your flames now? And please stop teasing me" there was a whining edge to his voice and he finally realized that the boy was being serious; he really wanted to touch his flames. He stared at the boy again and saw determination in his eyes; he felt his own eyes soften at the emotion. He always had a soft spot for those with undying wills but that was to never be shown, the humans here had no such things but he decided to relent this once.

"Don't say I didn't warn you" he muttered. Tetsuya felt himself beam in happiness as the big man called on the same blue flames on his pointer finger before he gestured for Tetsuya to touch it.

He expected a scream once the boy touched it but none came.

Instead, a giggle was its substitution.

"Wha-?" he stared at the blue orb on the child's hand in confusion; it didn't burn him?

"It feels warm and fluffy! Thank you mister!" Tetsuya happily snuggled the flame to his face, feeling the warmth it gave. Satan stared in shock before he looked at the boy happily snuggling his flames that were once deemed dangerous, now turned into a child's heater. He chuckled to himself at the thought and then he felt the faint echo of Yuri's face calling his name. He had to hurry.

"What's your name?" he needed to know. His beast was nagging at him and he found this boy intriguing, so why not? The boy was the first child to not run from him in fear and Yuri didn't quite count that category.

"Kuroko Tetsuya, can I keep the flames?" the boy now known as Tetsuya begged at him. He chuckled again and ruffled the boy's sky hair with his ruined form, he couldn't sustain for long.

"Keep it and I'll find you again, Kuroko Tetsuya" he cackled, his usual demeanour on before blending into the shadows and running off to kill more threats before Yuri or his sons could be killed.

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That night was known as the "Blue Night". The night where Satan broke free of Gehenna and released his flames on monks that were to purify a tainted woman. The day where many lost their beloveds to blue flames that betrayed beauty and the day when the five year old Okumura twins lost their birth mother.

The day when Kuroko Tetsuya lost his foster mother.

~Author's Note~

Yeah, I changed how the Blue Night was executed. Okay here's the explanation; Rin and Yukio were born five years earlier on the same year with Kuroko but Kuroko is older than them since he was born on January 31 and the twins were born on December 27. And Yuri had given birth to them in secret before someone from the Ministry found out and she was put on execution.

That's it!

Now review! Review!