A/N: This fanfic was actually from an overly active imagination of my friend who being a hard yaoi fujoshi along with m-preg in fb. It was an awkward moment when she suggests me this idea but then i was like 'omg! You're so awesome!'. So i tried to write this today (i got bored with nothing to do when the teacher leave us because she has a meeting and somehow I manage to write something). But...since i write it when I'm in my classroom which no one is a fujoshi here, I need to be careful. The result is my writing maybe worse than before. Gomen ne!

Hope you'll at least enjoy this, maybe a lil bit weird but as I said before, I have a weird sense of humor :3

Yukio is a demon in here and this happen long after the 'Gehenna Gate Incident'. He might be really OOC too…lol

Disclaimer: I don't own Ao no Exorcist

WARNING: yaoi, twincest, animal fucking (is it the correct terms? O.o), m-preg. DON'T LIKE DON'T READ! ^^


Mephisto Pheles can change into a dog and Amaimon into a green hamster. "Or it's just another animal body that they possessed". Yukio always thought about that. Since his demonic power has awakened he's been curious to know more about his demonic ability. Not to mention he's already start to train and fight with his flames like Rin. But his flame was much weaker than his older brother. The only things he can do were igniting his bullets with the flames and shoot it accurately like always. Still, the effect of the flame was enough to give him satisfaction as he saw how powerful it was compared to his silver bullets.

And he likes it!

Rin keep asking where his freaking scary attitudes to anything that appears demonic before has gone. Yukio would just shrug it off. Maybe it was something that Mephisto keep saying as a demon desire to knowledge that drives him to be like that. Yeah…whatever, he just couldn't be human again so why bother to hides his ability and natural talent. Now he knows how his older brother feels if someone keeps told him to stop using his power. It's really annoying and disturbing. He apologizes to Rin many times for those mistakes too. He has been nagging Rin from their first day in True Cross to stop using the flame to fight. He regrets it really much now.

Continuing back to the main point, he's actually thinking about demon transformation right now. That's why he asking his own self repeatedly about the two other demons he knows can do that. Mephisto and Amaimon. That flamboyant principle can change himself into a little dog and hanging around the academy without being notices. Of course, who would be wasting their time to check upon a little dog that walks around leisurely in the academy ground every day? That's sure lucky. His mind started to ponder off to one thing and another, things that has picked up his interest. While he just lay there on his bed enjoying the little rest he got, his mind suddenly stumble upon something.

"What if both of them, he and Rin able to change too?!"

His curiosity suddenly risen. "I wonder what animals we will be…"

Yukio sit up and leans against the wall thinking further. "Based on what I see in Satan's memories before, he possessed a wolf before entering their mom's body. "Could it be that we can change into a wolf?" He tries to think further but then a sudden long yawn interrupts his train of thought. "Better go to sleep now, I'll just ask Mephisto later…" With that he yawns again and slid under his cover before closing his eyes, leaving his tail to slip out. It's moving lazily on the side of the bed as Yukio slowly try to drift into a slumber. "Nii-san still didn't come back home…must be Shura-san pushing him under a crazy training again…"

xXxXxXx

The younger Okumura let out a sigh again upon seeing that pink dog wandering around the campus. Seriously, that principal love to change into a dog and not just that he's doing almost everything a normal dog would do! Yukio face palm. Right now that dog was actually peeing right beside the fountain! Well…even there's no one there except him shouldn't he being at least embarrass, or a demon really doesn't have a shame?

Oh…he forgot he's also a demon now but not for all demon right? He and his brother…okay maybe not for his brother. Yukio snicker at the memories where his dumb brother keep forgotten to bring any change clothes after shower so he end up running along the hallway naked towards their room.

Rin have an exception too. Firstly, no one else lives in the dorm. Second, no need for them to be ashamed when they've already countless time seeing each other naked in the bathroom and during their…ahem…. Yukio blush at the thought.

"You seem to have a problem Okumura-sensei, wanna talk about it?"

Yukio shocked. He sure was in a deep thought that he didn't realize that principle was already in front of him. "Well…uh…nothing"

"It's not good to lied Okumura-sensei, I can see that you're really curious to ask me about something"

Yukio push up his glasses and try to remain a calm facade. "Why did you always change into that dog form? I know that it's easier for you to go around the academy but sometime I also saw you in that form in your office too"

Mephisto laugh while Yukio look confused. He didn't understand what's funny in his question, or is it too direct and straight forward?

"Looks like you still didn't know much about a life of a demon. Well… Okumura-sensei, every high-class demon has two or three different form based on their need. For us, being in a smaller form like this help to save our energy since we don't have a real own body like you and Okumura-kun. We need to possess a human body and make it our own so it's still uses a lot more energy to even do some normal basic thing as a human."

The young exorcist didn't know how to react. "So, me and nii-san…"

"Yes…you two also can change, you just didn't know how"

"Teach us!"

Mephisto was quite shocked to hear that from the younger Okumura.

"Please, teach us!" He ask again.

"Haha…always being the curious one eh?"

"Wait, I'll go and tell nii-san" With that he walk away towards their dormitories where he's sure Rin Was already home.

"Meet me at my office tonight!"

xXxXxXx

"This is so amazing Okumura twins; you manage to do it successfully!" Mephisto clap his hands excitedly. Amaimon was there too, sitting on one of Mephisto's couch sucking on his lollipop as always. "Aniue, they look so small. I think I can beat little brother in no ease at all if they were like this" He delivers his comment, eyes looking warily at both twins. "But this was really impressive! Even a demon king can only mastering this skill after decades learning it; they can do it at once!" "Maybe it was fathers' blood influence…" Mephisto turn his gaze to Amaimon and smile brightly "That's one of the rarest good reasoning that I heard from you. Is Assiah has change your way to think Amaimon? That's why I said human culture and knowledge was far better than that dull, sorrowful surrounding in Gehenna!" Amaimon sat there like nothing happen with a mocking face "Oh, they're awaking" Mephisto looks again to the twins. Luckily that had managed to pull his interest from hitting the green-haired earth king. Or else, Amaimon won't get any of his food supply from Mephisto anymore as a punishment to his manner again. Seriously, sometimes his little brother act was just too annoying.

The older one let out a gentle mewl as he stretch his body. The younger one then followed to, slowly rising himself from lying on the floor. "Let me play with Rin, Aniue!" Hearing that Yukio quickly get to his sense and hissing to the earth king. "Touch my brother, I'll kill you!" This action picked the older one interest, he turn around only to be face to face with a cute cat with brown coat. His green colored eyes sending a deadly glare to Amaimon. His tail stood up. Screeching and readying himself to attack. Rin let out a shocked scream on what he sees. Well, it was supposed to be a scream right? But what he hear just a loud mewling sound. He looks around and got shocked again when Mephisto clicked his fingers and a mirror appear in front of the twins. "whaaaaaatttt?!" "Yukio, we're both cats!" "So, it succeeds?" Hearing their voices via demon telepathy, Mephisto respond to them "Indeed my little half-brother! Congratulation, both of you was able to transforming yourself into… a cute cats! I was expecting a wolf but whatever it still fantastic to know that you can do it at first attempt. Other demon king also taking a very long time to at least able to transforming themselves into a tinier animals than cats" with that he glances to Amaimon who put up a grumpy face now.

Yukio look at his brother "Damn, he's so freaking cute!" That messy blue fur and his constant mew while he's talking to Mephisto was making Yukio losing his sanity in every second. Without he realize, he unconsciously goes towards Rin and nuzzling himself to the older one. "Y-Yukio?..." Rin mew to his brother. Yukio didn't answer him. He keep nuzzling to Rin before he started to lick the others fur.

A sudden blue flames flaring and the twins was back to normal. "ah,ah,ah…no touchy, touchy Okumura sensei. I thought you always have a better control on yourself" Mephisto gesturing his fingers in front of Yukio. Embarrassed on what he did, Yukio look away from Rin but the older one just cupped his cheek and forcing Yukio to look into him. "Whaa…it's really hard to see you making this expression. You're so cute Yukiooo!..." The said boy blush three shades darker.

"Ahem!..." Mephisto was making sure they realize his existence there. Rin quickly released his hold and blush too. Mephisto start to walk around the twins observing them closer. "looks like everything's okay, no bad after effect" Yukio and Rin just stay silent "Okay now as you both can already use that skill, I hope you'll use it correctly" "Is there anything else Mephisto?" Yukio ask him when he saw the demon observing them again while thinking about something "Hmm, you know as you gain better control on your power I'm sure you'll be able to transform into a better animal form. For now, you can just turn into a cat" Rin replied with a long 'oh' "Well then, I hope you enjoy yourself!"

Just when Mephisto want to close the door after both twins leave his office he heard something from the older one "This gonna be really fun!" And at the same time he saw a glint in Yukio eyes when the boy looks at his twins.

"Damn, young demon reeked with hormones. He should learn how to control it better! And Rin, I'm sure he will misuse the ability" face palming, Mephisto let out a sigh.

"Aniue, you okay?…"


Wait for the updates! ^^

*When Mephisto change into a dog, there're puff of pink smoke right? Here I made Rin and Yukio transform in a flare of blue flames, because I thought it's far awesome than a puff of blue smoke :p

Btw, I'm saying that this is a yaoi story but nothing much happening actually. I dunno if I'm gonna put in the kinky sex tho because originally I'm just intending to put some YukioxRin fluff and skip the fuck scene…lol
who knows…things can change later right?

ps: Forgive my terrible grammar mistakes. English isn't my native language :)

Review?