First ao no exorcist story that isn't a oneshot! This will be an ongoing story, i don't know when i'll be updating, i guess it depends if anyone actually reads this and wants part two! I literally have no life commitments so i can update whenever, sorry its a short chapter!

Review! tell me your thoughts :)

"Astorth, my son."

"Yes, farther?"

"I want them both - alive, and tell Sameal and Amaimon to return as well, i'd like all of my children home."

"Yes, farther."

Satan stood up from his throne and opened the gate leading to Assiah. He watched as the king of rot slowly sank to the bottom.

"RIN!' Yukio shouted for the 5th time that morning "Your going to be late, get up!"

Yukio saw his twin brother was still fast asleep, ignoring his calls. Rin's tail was poking out from the blanket, swishing slightly. Idiot, Yukio thought, grabbing his tail and pulling it. The older demon screamed and immediately jumped up.

"What was that for!" He cried, snatching his tail away from his brothers hard grasp.

"Rin, i told you to get up five times, your gonna be late."

"Oh crap!" Rin rushed to get ready, cursing at himself staying up late to read manga.

Yukio was nearly finished the breakfast Ukobach prepared when Rin came down, dressed but dressed sloppily. Once both brothers finished breakfast, they headed to school. All during lessons Rin didn't concentrate during class. His gaze kept falling to outside the window, regular school seemed pointless to Rin. He only enjoyed one class and that was english as he sat next to Shima and they always made it fun.

Once cram school came around, Rin was already tiered from normal school. As usual he took a nap during his brothers class. The daily routine was to fall asleep, be woken up, argue with his twin in class, and then half listen and expect to become the best exorcist. The elder twin went back to his daydreams of being paladin. So once he was handed a worksheet he had to ask Shiemi on what they were meant to be doing.

"Alright class, that just about covers it for today, don't forget you have homework due." Yukio announced, closing the text book.

Everyone left the classroom, apart from the Okumura twins. Yukio didn't have any meetings tonight so he was able to go straight home with his brother. The younger twin gathered his items and he pulled out his magic key. They walked through the door and they were transported back to their dorm. Rin went to help Ukobach prepare a meal.

"It's nice to actually enjoy a meal together for once, i always seem to have some sort of meeting." Yukio smiled, excited to try the food his brother made with the help of the stove spirit.

"I've been wanting to make this for a while, but wanted to wait until you didn't have to reheat it when you got home."

Both brothers and Kuro began to eat, Rin and Ukobach soaking up the compliments they got.

"That smells delicious, i hope theres enough left for me."

Rin and Yukio's head snapped around to see Mephisto standing in the doorway. He sat down at the table and his familiar prepared him a bowl.

"Mephisto! What are you doing here?" Rin asked, wishing he would leave so he can enjoy a meal with his little brother.

"I've got to talk to you both; i meant to catch you after cram school ended but you'd already left."

"Sir Pheles, can't this wait?" Yukio said, pushing his falling classes back on his nose.

"WOW, THIS IS AMAZING!" His eyes became watery as he expressed his love for the meal. The time king ignored his younger brother's questions, to focused on the food before him.

"Anime sucks."

"WHAT DID YOU SAY, I'LL HAVE YOU KNOW I-"

"Relax you clown i was joking, i knew that would get your attention. What do you want?"

"Remember how the vatican put your execution on hold?"

"Are they going t-" Yukio started off

"No, they decided to see weather or not he'd become the demon who saves Assiah, or the demon who destroys it. They've decided it to be too dangerous, they want to send Rin on a mission to prove himself."

"A mission? SWEET!" Rin exclaimed, tail wagging in excitement.

"What kind of mission?" Yukio quizzed, not sharing the same enthusiasm as his twin.

"I'm not sure yet, i know nothing right now, i guess they're still deciding."

"I don't like how this sounds."

"Don't worry man, i got this." A grinning Rin said, only making his brothers worry increase.

"Well, i must be going now, thank you for the meal!" With a puff of pink smoke he was gone.

Yukio swallowed the lump of fear in his throat, trying to think of a way he could get his brother out of this. He sighed, giving up for the moment, until they had more information about his 'mission'.

Two tails wrapped around his ankles, he looked down to see Kuro looking up at him.

"What's wrong, Yukio?"

"Nothing, I'm okay." He smiled, bending down to pet the cat sidhe. Kuro swirled his tails around Yukio's legs, leaning into his touch.

The next day at cram school everyone heard about Rin's mission and was asking questions, Yukio didn't want to discuss the subject and always tried to get the focus back on the lesson. Shiemi was equally worried about Rin, yet she always had a good side to things telling Rin whatever it was he'd be great. It wasn't that Yukio feared Rin wouldn't be great, he feared about his control over his flames. Ever since his own demonic side awoke not to long ago, he felt the burden it was, he felt the rising of the flames when his emotions flared up, he now knew how hard it was to control those flames. He hoped anyone wouldn't think too much of his new demonic powers, because in all honesty, he wasn't sure if he could control them either.

Once the class was dismissed (apart from Rin who stayed) Yukio began to pack up. He received a text earlier on from Mephisto to stay behind, wanting to talk to him and his twin.

"Where the hell is that clown? Why is he so late?" Rin shouted impatiently

"Relax Rin, i'm sure he'll be here soon." Yukio was acting patient on the outside, yet inside he was just as pissed as his brother. He did have papers to grade, homework to do…

Suddenly Mephisto popped into the room, using his powers as a surprise entrance. Although the twins were not surprised, they were never surprised at Mephisto now. By now they were used to all his ways.

"Can you ever just walk through the door like a normal person?"

"Hello to you to, Rin."

"Lord Pheles, do you have an update on Rin and the vatican?"

"No, thats not why i asked to speak with you both." With a pink cloud smoke he transported them to his mansion's dining room. 'Won't you boys join me for dinner."

The twins looked down to see instant noodles and candy in front of them.

"This isn't dinner, this is a child's snack." Yukio protested, eying up the my little pony chopsticks beside his 'dinner'.

"Kids these days, ungrateful, and under dressed." With a snap of his fingers, both twins were dressed in fancy looking suits and their hair slicked back out of their faces.

Rin started to complain but soon gave up after seeing the dry look on Mephisto's face, realising he truly didn't care for his younger brother's fashion ideas. They began eating in silence, none knew what to say. Rin thought of a snide comment about the chopsticks and Mephisto's unique decor but decided to remain quiet, knowing it was worthless even to question Mephisto.

Yukio broke the silence "Sir Pheles, why are we here?"

"What? I can't invite my younger brothers over for dinner?" Replied the time king, throwing his noodle carton towards the pink coloured bin. "I would like to know how you both are?"

"How we are?"

"Yes, it wasn't too long ago you were possessed by Satan himself, thats got to take a toll on you. As your guardian it's my job to make sure your both well."

"We're both fine, sir."

"And i wish i could believe it Yukio, but you seem stressed lately. I know you have a lot going on with being a top student, as well as teaching yourself, and of course being an exorcist. Not to mention, keeping your brother and yourself in check."

"Like i said, Rin and I are both fine. As for my work load I'm fine, i've handled worse."

"Handled worse? Like being possessed by Satan, yes, that's something i wanted to talk to you about."

"What's this got to do with anything, its the past."

"The past is apart of you. Theres something i wanted to talk to both of you about, demonic nature."

"What's the real reason you brought us here cause it wasn't for this lame ass meal." Rin insulted, throwing his chopsticks down on the over patented plate.

'I told you, demonic nature."

"What about it?"

"I'm going to guide you, teach you." Mephisto smirked devilishly at their reactions.

"I'm not a demon!" Rin yelled, the line between his brows creasing

"Oh, so that isn't a tail i see swishing behind you in anger?" Rin sat back down "Or, is it denial?"

"Sir Pheles, what do you mean teach us? What about?" Yukio asked, the familiar feeling of anxiety was crawling back up his throat.

"Seriously, for a top student you've got to listen better. Like i said, demonic nature, to be more specific i'll help you with the basic demon instincts. I can help with your power a bit, but the blue flame of Satan is not my speciality."

"Thank you for the offer but we decline." Yukio said, standing up to take his leave.

"I never said it was an offer, sit."

"What could you possibly teach us, how to dress like a clown?"

"No brother, I was thinking of the basics first. I know your both just small children, wouldn't want to complicate things to much would we now?" Rin growled, only amusing Mephisto even further. He snapped his fingers and they were in a large clearing.

"Something every demon should know is how to fight with their own hands, without using a weapon, Rin I'll test you another time. As for now, Yukio, give me your weapons." Mephisto held out a hand.

"What, why?"

"I just told you, i want to see how you fight without your weapons. I know you received basic combat training when you were on the path to becoming an exorcist, they teach it mildly to everyone."

Reluctantly, Yukio handed Mephisto his weapons. Once the youngest demon was free of all bullets, hand guns and holy water grenades, Mephisto instructed him further.

"I see your smart, unlike Rin here."

"HEY, WHAT THE H-" Mephisto whipped a hand over the elder twins mouth to shut him up.

"You hide your tail, which is smart considering a demons weak point is their tail, as well as their heart. Now, Amaimon, it's time."

Amaimon leapt from out of nowhere crashing into Yukio.

"Take mental notes, a demon must always be ready for an attack."

Yukio stumbled back from the force the earth king hit him with, he wasn't expecting that. Amaimon charged forward again, but Yukio dodged his fist walking backwards away from him.

Mephisto poofed himself, and Rin, onto his floating arm chair. He leaned back with a relaxed sigh to watch the fight. Rin squirmed beneath his tight grip. "Just relax little brother, watch the fight."

Although his face showed no panic, Yukio was scared inside. Sure he knew some basic combat but he was trained to fight with guns, and he was pretty sure the earth king was fully trained. He kept blocking Amaimon's attacks, either dodging or holding his fist down causing Amaimon to crack the earth beneath them, that of course only played to Amaimon's advantage more. The earth king held Yukio down, repeatedly punching his face, his glasses were long cracked.

"This is so boring, your so boring. This is de ja vu for me with Rin Okumura at the amusement park. I'm so bored."

"THEN STOP!" Yukio shouted, attempting to push the demons fists away from his battered face.

"I can't, big brother told me to do this. I have to do what he says or he'll turn me into a hamster again, and i didn't like being a hamster. You can't go to the candy store or sight see, it's so dull."

"I said STOP." Yukio clenched his teeth, or rather fangs, together. Blue flames ran over his body in defence, he pushed Amaimon up. Kicking him in the stomach and causing him to fly back a good few spaces over the field.

"Put me down you clown, i've got to help him!" Rin still struggled under Mephisto's grasp, his eyes not leaving his flame infested little brother.

"I can't do that, i want to see how this plays out."

Amaimon jumped back up, back through the air pushing Yukio back down. Blue flames grew over Yukio's body, he roared with anger, rushing at Amaimon.

"What the hells wrong with him?" Rin asked, not giving up on trying to get out of Mephisto's restraint.

"A natural demon instinct. Unfortunately, he cannot control his flames well at all. They take over him and overpower him, he can't just use their power, he's got to own them not just wear them like a jacket."

Yukio's raged growls filled the clearing, he pushed his flames towards Amaimon, getting a few punches in too. Amaimon fell to the ground, still fighting back.

"Alright, i've seen enough." Mephisto jumped down dragging Rin along both with him. He pried the two apart, finishing their fight, but Yukio's rage carried on. Flames danced over him as he swung at Mephisto. "Well, this is unexpected."

Yukio looked like a demon more then ever, apart from being covered in a blanket of blue flames, his fangs had grown, and his ears became longer and more pointy. Although his tail was still tucked in, his facial expression made him look the most demonic. His pupils blue and red slits and his fangs beard, he crouched down ready to further attack the time king.

"Yukio, what's wrong with you? Stop this!" Rin threw his arms on his brothers shoulders, staring into his demented eyes. The youngest demon continued to growl and lash out. "I'm not going to fight you, stop this. I can't hurt my little brother."

"Eins, zwei, drei!" Yukio was frozen in time.

"What the hell did you do that for?" Rin asked, tapping his trapped brother's time prison .

"Relax, I'll let him out once he's calmed down a bit. This only proves further more, you boys need by guidance."

Back with Astaroth, he possessed a random human, claiming his newest host body. He stood on a tree branch facing the monastery. This was where he battled the exorcists last time he was in Assiah. His farther had told him that the priest who exorcised him was dead. He could sense that the Okumura twins were not inside, thats when he realised they would be at true cross academy. Though now, he had to figure a way into the academy due to his elder brothers protective shield. He yelled out in frustration, causing more and more coal tars to swarm around him.

So that was the first chapter! Let me know what you think and please review fave/follow! PM me if you have questions, or want to talk :)

I'll upload chapter two soonish