Okumura Rin sighed once more as he kept his eyes on the floor, feeling but ignoring the angry eyes focused on him from the other side of the room.

Another fight…

He was currently seated in the principal's office, waiting for his father to pick him up.

Sadly, his current situation had become entirely too common place. Still, there was not a shred of remorse in his heart as he gazed steadily at the battered and bruised boy who had attempted – dared – to pick on his little brother.

Despite the many derogatory words that had been thrown his way, his assault had not faltered as his fists – too devastating for things so little – had relentlessly branded into the other child's skull one universal law.

Okumura Yukio was off limits.

The opening of the door had him looking up to meet the calm gaze of his father, Fujimoto Shirō.

Holding back a wince as his dad let loose a sigh, Rin refocused his gaze on his feet while the adults in the room had the necessary talks.

Almost half an hour later, once his sharp hearing noticed that the room was silent, he dared to raise his head and meet the solemn eyes of the black clad man standing before him.

Gazing steadily at his adopted father and letting him see the firm resolution and lack of remorse in his blue eyes, he waited for the scolding he knew he was due.

Somehow, Rin still found himself surprised when, instead of a scolding, his dad ruffled his hair and said somewhat jovially,

"From the lack of injuries I can tell that you've gotten better at being your little brother's protector, this old man is so proud."

Feeling his eyes widen in surprise, Rin fought to hide the redness suffusing his cheeks as his father's words settled in his heart, easing the tension from his frame.

Shirō then squatted down to eye level and continued in a much more serious voice,

"However, Rin, while it is important to be strong, it is also important to remember that violence does not solve everything. There will come a day when Yukio will need your brain, and your heart, more than your fists."

Shirō held Rin's eyes until he was certain that his message had gotten through.

Nodding to himself, he suddenly broke out into a wide smile and straightened his posture. Reaching out to grab his son's hand, he wasted no time in getting them away from the school, all the while chattering at Rin about a new recipe he wanted to teach the boy.

While Rin was avidly following his father's rapid words, Shirō took the chance to gaze down at the wonder shining in the little boy's eyes and felt his heart breathe a sigh of relief as he found nothing else lurking in the azure depths.

Akihiro Takeshi's droning words barely faltered as his eyes flashed onto the set of black hair placed down on the desk in the back of the classroom.

A few students, noticing the direction of his gaze, turned to look behind them, only to erupt into muffled snickers as they found the source of their teacher's distraction.

Using his unoccupied hand to readjust his glasses, Takeshi's hand suddenly flicked out, unleashing a white blur in the direction of the snoozing teen.

With bated breaths, the other students tracked its trajectory with gleeful anticipation.

A few inches from the head of black hair, a hand suddenly snapped the projectile from the air, and with a low groan, Rin opened his eyes to find everyone staring at him.

Blinking at his teacher with an almost heart melting look of innocence, Rin asked,

"Is there something on my face?"

With a silent scoff, Takeshi drawled,

"Rather, Okumura-kun, please translate the passage I just read into English."

Flicking his eyes this way and that, Rin clearly read his classmates' desires for his humiliation in the eyes around him, letting him know that he would be getting no aid from them.

Maintaining the same innocent expression on his face, he turned back to his teacher and began speaking in flawless and barely accented English, before ending with a small smirk that lent a subtly sinister feel to his last words

"…for it is better to reign in Hell, than to serve in Heaven."

For a moment the entire class was silent before their teacher cleared his throat, eliciting a few flinches at the sudden sound. Forcibly gathering his composure, he finally spoke with a weary sigh,

"It is not that you are unintelligent, Okumura-kun, you just need to apply yourself some more."

Turning from his student, he returned to teaching the class about John Milton's work.

Rin considered what his teacher had just said, before slumping back onto his desk with a tired sigh of his own.

It's not that he slept in class because he was lazy; it's just that he had always found it difficult to remain fully conscious during the day. In fact, no matter how it looked at the moment, the truth was that he had improved tremendously over the years.

Once his condition – whatever it was called – had kicked in years before, he had been practically comatose once the sun rose but like an energizer bunny once the sun went down.

Now, he had worked it out to needing only three hours of sleep during the day, with an added – forced – three hours during the night, leaving him able to act normally during the day. It was loads easier now that he wasn't forcing himself to sleep during the night when he had so much energy, and then fighting to stay awake during the day when his body just wanted to shut down.

Still, the change in his sleeping schedule had come with the added benefit of leaving him active when everyone else was asleep. So, to keep from going insane he had been forced to pick up hobbies during his periods of wakefulness.

Though Rin was only fifteen years old, he had already mastered the culinary arts to such a degree that if there existed such a rating as a six star chef, it would be too low for his level. In addition to that, he had discovered that languages came to him like long forgotten memories. It had been frighteningly easy to pick up English, Latin, Hebrew, Greek, and a host of other languages from the old tomes stored in the church where his family resided.

Also, while his brother, dad, and adoptive uncles had slumbered, he had snuck into the unused choir room to have a go at the instruments there.

The experience had left him shaking for hours after.

Even at the tender age of ten, he had known that it was unnatural for him to be able to pick up an instrument at random and make it pour forth melodies worthy of being heard in the heavens themselves; it was almost like music flowed through his veins, leading him to coax out such tunes that unimaginable sensations had been birthed in his very soul.

Still, despite all his talents, he had not gone out of his way to showcase anything other than his ability in the kitchen. He wasn't afraid or anything, it was more like he didn't feel the need to.

At least, that is what he kept on telling himself.

He deliberately turned his mind away from the memory of his father's startled and slightly wary eyes when he had slipped up and cursed in Latin after stubbing his foot on a pew.

His teacher, calling him not unintelligent, didn't even cover the half of it.

Being academically bright was Yukio's thing, and it might sound pathetic, but Rin had no desire to take that away from him. Even if that meant taking his needed three hours of sleep during classes, and then putting in the minimum amount of work in his assignments.

A sharp ping, which only he could hear, had him suddenly getting up from his seat and making his way towards the door.

From the corner of his eye, he watched as his teacher made an aborted move to halt him just as the bell for their break period sounded across the entire school.

Knowing that most of the class was now staring at him in confusion, he paid no mind to them as he set out to find a spot where he could spend recess.

After all, He could hardly tell them that he had heard the sound of the bell's hammer being pulled back in preparation to begin ringing the bell.

Yukio looked up with a smile on his face as he heard his older brother's voice calling out his return.

Hastily sliding out of his chair, he rushed to the entrance hall, barely managing to halt just before the doorway where he would be visible. Taking a deep breath to make it seem as though he had been taking a casual stroll, he stepped into view and promptly flushed at the knowing grin being sent his way by his older twin.

Before his mortification could suffocate him, his brother glomped him in an enthusiastic hug with a heartfelt,

"You're back, Yukio!"

Laughing happily as he returned the hug, Yukio took a moment to bask in his brother's ever present love, before finally disengaging from the embrace.

Taking the time to smoothen out the wrinkles from his new uniform, Yukio suppressed another smile as Rin finally took notice of his new get up, only to once more jump him with a cry of,

"Ha, you passed! I knew my little brother could do it! I'm going to make all your favorite foods, including tons of sashimi."

Seated around the table with his makeshift family, Fujimoto Shirō was once more reminded of why he fought the forces of darkness on a daily basis. Smiling softly to himself, he reached out with his chopsticks to pick another morsel of Rin's frankly divine cooking, before he suddenly halted as a thought came to him.

Leaning forward to catch his older son's attention, he voiced his thoughts,

"Rin, where did you get the food you prepared for today?"

Blinking up from where he had been avidly listening to his brother speak about True Cross Academy, Rin took a moment to collect himself before answering,

"I knew Yukio was going to pass, so I stopped by the store on my way back."

Furrowing his eyebrows as he considered the response, while absently noticing the pleased flush on his younger son's face, Shirō still pressed on, now garnering the attention of everyone else at the table,

"Yes, but how did you buy it?"

Casting a confused look at his father, it took Rin a moment to understand what all the confusion was about.

With a smack, his hand impacted his forehead, and before anyone else could react, he was already digging into his pocket while speaking,

"I forgot to mention this, but a while back, I got a part time job at X Restaurant, and today was payday."

Eyes widened in surprise all around as the listeners recalled which restaurant he was referring to.

With a muted exclamation of triumph, Rin fished out a paycheck and handed it over to a visibly surprised Shirō.

Glancing down at the check, Shirō choked on air once his eyes read over the amount written on it. Spluttering in shock, he exclaimed,

"Isn't this too much for a busboy?"

Rin paused for a moment, before he raised an eyebrow in mock haughtiness and said,

"A busboy? As if, I work as a part time chef after the manager tasted my food on the first day."

With a gasp of shock, one of the other priests at the table asked,

"A chef, but…but it's a four star restaurant."

Casually buffing his fingers on his shirt, Rin glanced up at the stunned audience from under his bangs and merely said,

"I know"

With a joyous laugh, Shirō was out of his seat and twirling a protesting Rin through the air as they all celebrated Rin getting and keeping such a high paying job at his age.

Rin, seeing a grin on his traitorous little brother's face, wasted no time in grabbing him and dragging him into the maddening spin around the dining room.

Eventually, Shirō and the two boys collapsed in out of breath laughter, while the others merely watched on with fond smiles at the very happy family.

Sitting up, Shirō cast a glance at Rin and said,

"Even though it's nice that you want to chip in like this, shouldn't you keep some of this money for yourself?"

Waving off his dad, Rin replied,

"It is fine; I get tips anyway."

Raising an eyebrow in interest, Shirō finally smiled and pocketed the check, allowing everyone to return to a much happier celebratory meal since they were now all celebrating a two-fold success – Yukio's acceptance into the prestigious True Cross Academy, and Rin's employment at the renowned X Restaurant.

With a gasp, Rin lurched out of bed with his heart beating a mile a minute.

His vision had already adapted to the lack of light, leaving things as clear as day though it was an hour after midnight.

Casting his gaze around, he quickly deduced the reason for his unease as he saw his brother's empty bed, and judging by its state of disarray, it had recently just been vacated with due haste.

Wasting no time, Rin was dressed in pajama pants and out the door in a flash, deciding to make his way towards the entrance hall since that was where his gut was leading him.

However, he found himself stumbling as he passed what looked to be part of a circle laid out in chalk just outside his door. The moment his trailing foot cleared it, a wall of sound slammed into his sensitive ears, leaving him discombobulated as he nearly missed a step.

The sudden sound of Yukio's voice raised in agitation followed by the sharp retort of a gun had him tearing out of the hallway, moving faster than he ever had in his life.

He got to the railing overlooking the entrance hall just in time to see Yukio go flying past a slightly scuffed up Shirō.

Flicking his eyes from place to place, he took in the gathering of disfigured and fantastical creatures crowding the entrance hall.

His attention was then captured by a gravelly voice speaking into the silence as Yukio was helped back to his feet by their two uncles.

"Where is the young prince, Exorcist trash? You cannot hide him from our Lord any longer."

Straightening and donning an air that screamed death, Shirō smirked at the horned beast standing before him, before speaking in a steely voice that had most of the lesser demons stepping back in fear,

"You will not have my son, even over my dead body."

Eyes widening in outrage, the eight foot tall beast opened its mouth to rage at the Paladin, before it suddenly paused and took in a deep breath.

Releasing a rumbling purr that sounded like someone chewing boulders, he ground out,

"Ah, the scent of royal blood"

And before Rin could react, the beast swung its red eyes to his position, causing Shirō to whirl in alarm, though he never turned his back fully on the horned abomination.

Just as Shirō moved to speak, he was interrupted by the beast suddenly executing a bow that was all the more frightening for the grace he was able to put into it with such a body,

"I am honored to meet you, my prince."

Freezing as his quick mind took in and interpreted the statement, Rin turned disbelieving eyes onto his father, only to flinch back as he saw the truth in his gaze. Turning his head to Yukio, he suddenly found himself feeling cold as Yukio cast his eyes downwards with a tremble in his frame, unable to meet his burning blue gaze.

Just as Rin was about to stumble back in denial of what he had just heard, Yukio snapped his head up and snarled with such ferocity, the towering demon flinched back in surprise,

"He is not your prince…he is my brother!"

Ending with a yell of anger, Yukio's hands snapped upwards and unleashed a stream of bullets from his dual wielded pistols, forcing the horned beast to move out of the way, leaving the lesser demons behind him to suffer the brunt of the attack.

Finally coming to a stop as the guns clicked empty, the great demon cast a speculative gaze at the panting younger twin, before suddenly shrugging,

"Very well, mortal. I can accept that my prince is your brother, however –" and here a slowly maliciously smile crept across his gruesome visage, "– this exorcist trash has no right to call him son, isn't that right, priest?"

Steadily meeting the demon's mocking eyes, Shirō grit his teeth as a memory of a weakened and dying woman flashed across his eyes,

"...please...I beg you...my boys..."

Taking in a deep breath to steady his suddenly shaking hands, he opened his mouth to speak when his eyes widened in fear at a sensation crawling up from the pit of his belly.

Something was trying to get in.

Realizing the true purpose of the demon's words, Shirō wasted no time in fighting back against the possession trying to take advantage of his slight moment of weakness caused by the combination of the still painful knowledge that the twins were not his and the look of fear and denial he had seen on Rin's face.

Hunching in on himself as he felt his consciousness slipping, he was only able to hear the tail end of Yukio's alarmed shout before a shadow was suddenly cast on him.

Looking up, he immediately noticed the tall form of the demon king about to pummel him into the ground, having capitalized on his momentary distraction.

Just as the demon launched its fist at his head, a blur of black flashed in front of him, and with a boom of sound, the hulking form of his impending doom was launched away, flying like a bullet to embed into wall next to the entrance of the church.

Focusing on the smaller form before him, his eyes widened as it resolved to show him his older s – to show him Rin, with his head bowed down.

Gritting his teeth as the pressure inside him increased, he suddenly felt a hand on his face, urging him to raise his head.

Doing so, he met the fiercest set of blue eyes he had ever seen, and waited for the no doubt angry words headed his way.

For a tense second, Rin searched Shirō's eyes, giving him the very odd sensation that the boy was seeing more than he could ever possibly know.

Then in a soft murmur that managed to pierce the silence left in the wake of his intervention, Rin began to speak,

"Someone once told me that family was more than blood. He told me that a person's father was more than just the person who helped to conceive him. He said that a father was someone who taught the person how to do stuff like cook, and take care of his little brother; who cleaned him up after all the fights he had and smiled at him where other adults only frowned; who supported him and believed in his dreams…and even helped him knot his tie for his job interview. Now I don't know whether or not that person was correct, since he is just some old man who is too old to know what he was talking about, but I don't care. Even if it makes me a fool, I want to believe in what that stupid old man said."

By the end of his words, Shirō's eyes were suspiciously wet but his internal war had ceased.

With a hand that now trembled from something other than fear, he reached out to cup his Son's cheek and smiled, while saying,

"I must be really old if I need to get a lecture from you, brat."

Rin opened his mouth in retort but he was interrupted by a shadow suddenly falling over him and his father's eyes widening in alarm.

A deep voice behind him grunted out,

"If you will not come quietly, young prince, then I am sure my Lord will understand if I use force."

And as he felt the change in air pressure as a mighty fist descended towards his head, Rin spoke in a soft voice that caused a momentary flicker of fear in the demon behind him,

"Hey idiot, try to read the mood properly."

In a flash, Rin struck out with an airborne round house kick which connected with the demon's neck.

For the duration of breath, Rin hung suspended in midair with his foot planted into the side of the thick neck of his opponent, before his powerful legs flexed and slammed the great beast into the floor with such force that its head actually bounced out of the small crater it had made, before finally settling down as the beast was knocked unconscious.

Wasting no time, Shirō hastily but accurately recited an Aria which banished the demon back into the depths of Hell.

Slumping down in relief as the minor demons began to die out in the absence of their leader, Shirō took a moment to gather himself enough to face the oncoming storm.

Opening his mouth to speak, he was cut off by Rin's rueful voice,

"So, the son of Satan huh, how did that happen?"

So, let me tell you a little something about how this story came about…Rin is quite literally, the son of Satan…not some random middle tier demon…Satan himself…Sure, we are told that his mom was an average exorcist, but no matter how you do the gene mixing, there is no way that Rin would not have inherited any of his father's talents…cunning, intelligence…ruthlessness…That said, I do love Rin's canon character, he is a lovable goofball, but that won't stop me from writing this...Furthermore, notice the thing with music...popular lore (I'm not sure how accurate said lore is, but I don't care) has Lucifer (aka Satan) as the chief musician of the heavenly host...ergo, music. I'm not sure if I was going to use it for something, but I put it there just in case.