Demon Baby Daddy
Chapter 1: Normal Day
A/N: I'm sorry this just popped into my head so uh here you go. This chapter is kinda long and slow, just trying to set the scene; I swear the other ones will be much more fast-paced. Also this is set in the anime universe for the pure purpose of demon Yukio. Btw no lemons/smut scenes because I'm not so confident in my smut writing and also to keep the T rating on this fic (BUT if I am feeling up to it, I'll post it as a separate section on ao3), but there are heavy implications throughout.
Imma just say it here and now rather than later so: You clicked the link knowing what was in store so don't come complaining if you don't like mpreg/yaoi.
Rin awoke groaning and shifted over, feeling disorientated. With a yawn, he noted he was in his dorm room, judging by the harder bed and rougher sheets. Flinching slightly as he turned over, he huffed throughs his nose and frowned, trying to order his thoughts.
"You're up."
Rin blearily opened his eyes and blinked, trying to clear his vision. When the mist cleared he was greeted by the sight of his twin brother watching him from his seat at his desk.
"Are you feeling alright? Not too sore?" Yukio asked calmly like it was the most normal thing in the world to ask his brother. Out of context it might've sounded innocent, but it wasn't in the least. Rin huffed and pressed his face into the pillow, groaning. He heard an amused laugh from Yukio, only aggravating him more, "I'll assume that's a no".
"Damn right you moley four eyes," he hissed when he tried to sit up, rubbing his back. "Might be alright for you but it is bloody painful for me!"
Yukio stood up and began packing his bag, "It must be truly painful if it was to enough rouse you this early. I wonder if Amaimon is experiencing similar pains?"
Rin snarled, "He's probably fine thanks to his god damn accelerated healing."
Yukio closed his bag and began to walk to the door. "Make sure you start getting ready soon," he said and disappeared down the hall.
Rin shakily got to his feet, wincing. Damn demon brothers. He wobbled his way down the hall to the washrooms and to a shower, turning on the hot water. He hadn't been able to shower the night before, before falling asleep and he could feel the stickiness of sweat still on him. Undressing from his trackies (he suspected Yukio was responsible for dressing him), he stepped into the shower and leaned an arm against the wall, resting his head into the crook of his arm. He exhaled as he reflected over the past few months, leading up to now.
It honestly shouldn't have happened. It was wrong on so many levels. It had started out so violent and unsteady; Yukio and Rin just mending together their sibling relationship after Yukio's demon blood was awakened, Yukio feeling mistrust to Mephisto over he's plotting, while Amaimon and Rin were quite literally at each others throats. But then, Mephisto, the damn clown he was, had decided that the four sons of Satan should start getting along. So after multiple unimaginably awkward 'family outings', with tense silences and Rin and Amaimon glaring daggers at each other, things finally started working. Rin and Amaimon had bonded over mock-fighting, originally vigilantly supervised by Mephisto.
With Amaimon and Rin having formed a friendship, the trips became much more frequent, more enjoyable. Yukio and Mephisto began to relax and Rin and Yukio were able to properly reform their previous closeness. Yukio and Mephisto began to form a friendship over their continued attempts to keep their destructive brothers in check. Mephisto had gradually become even more extravagant in his action towards the twins, which Amaimon had assured them, was Mephisto's final barrier before finally becoming comfortable with others. Yukio and Amaimon had also formed a much weaker (in comparison to the other) friendship, more like a friend-of-a-friend sort of relationship.
For a couple of weeks everything was fine. Nothing was going wrong and there were no foreseeable problems. Rin was improving in Cram school thanks to conversations with his two older brothers, much to Izumo's and Bon's surprise (it had been a sort of mutual agreement to keep the new-found friendships under wraps). Yukio had learnt proper control over his new powers thanks to all three brothers. According to Mephisto, Amaimon wasn't so insufferable now because he got to have regular battles with Rin.
But then everything went wrong...
Rin stepped out of the shower, now clean, and made his way back to his room. After dressing quickly, he made his way downstairs to where Kuro and Yukio were eating. Rin could hear a clatter from the kitchen indicating Ukobach was in the kitchen, cleaning up probably.
"Rin!" Kuro yowled in delight on sight of the raven haired boy. Ukobach chattered his hello from the kitchen.
As Rin slid into his seat next to Yukio, being the moley four eyes he was, asked, "Feeling any better now, Nii-san?"
Rin flinched slightly at that as Kuro gave a curious tilt of his head, "What happened? Did you get hurt yesterday?"
"N-no! Nothing like that!"
Kuro meowed like an ordinary cat but to them they heard "Then why would you feel better?". Rin silently cursed the little inquisitive cat. Wasn't he supposed to one hundred and twenty one? He acted more like a six year old human child.
"Uh y-yeah! I did lot's of rigorous training yesterday!" Rin had to hold down a flinch at his own wording. Baring his fangs slightly at his bespectacled brother's smirk, he slammed his heel down onto Yukio's toes. It wasn't like he was lying! Amaimon had been more aggressive in his attacks in their sparring yesterday, forcing Rin to work harder. Though that wasn't what made Rin sore...
Fortunately, the little cat demon seemed to miss the yelp and accepted the reason. Giving a little jump, he chirped "We haven't played in ages Rin! Promise me we'll train tonight!"
Rin nodded and dug into his breakfast. Yukio took his tray up to the counter, giving his thanks to Ukobach on another excellent meal. Grabbing his bag, he waved goodbye, leaving the two demons to finish their breakfast.
Rin glanced over at Kuro and felt a twinge of guilt. He loved Kuro and hated having to sneak around and make excuses to the honest and sweet little Cait Sith. However all four had agreed it would be in everyone's best interests to keep things quiet... as in dead silent. Rin trusted Kuro but he wasn't sure how he'd take it if he found out. Also he wasn't sure how well the twin-tail could keep a secret.
Quickly finishing the meal, Rin galloped upstairs and gathered his things, slinging the Kurikara over his shoulder. As soon as he opened the door he was greeted by a little lime coloured hobgoblin with a black harness.
"Behemoth!"
Rin knelt down to give the little demon a scratch behind the horns, receiving an affectionate growl in return. His little burgundy tail started waving about happily, reminiscent of a dog, and began salivating even more. Amaimon had told Rin that Shura and Angel had exorcised him when he had stormed the Vatican in search of Rin (ahh good times!) and Rin was secretly glad the dog-like demon hadn't died... he was cute in his own way, kinda like a pug! (Rin had a sneaking suspicion that was what Behemoth possessed)
Rin tilted his head to the side. It was odd seeing the familiar without his green haired master. "Where's that broccoli head eh?" Behemoth gave a jolt, as though remembering something and leapt up and down on his stumpy legs. He extended his paw and in it was a small note written in frightfully bad hiragana that could only belong to Amaimon.
6:00 or as soon as can
Rin almost sighed at the awkwardly written katakana that spelt out Amaimon's name. He wasn't the best reader or writer himself, barely able to read common kanji, but his 'older brother' hardly had any grasps on the Japanese letters.
The raven haired gave a small jump when he noticed Behemoth was still there. Giving a quick thumbs up to signal his thanks, the hobgoblin grinned widely and waddled away at a rapid pace.
Rin began making his way to school, his thoughts swirling for the third time that day.
When Amaimon and Rin first started their play-fights, Mephisto had created their own arena in which to use at their will. It changed every time they went, sometimes becoming a forest, sometimes a post-apocalyptic city; at one point it had replicated Mephiland (it was only later that they both realised it had been to celebrate the three month anniversary of their first encounter)! There was a safe viewing area Mephisto used to supervise or when Yukio would come to watch every now and then. Mephisto had made the strict rule of no fighting outside of the arena otherwise they'd both be paying out of their allowances; accompanied by a no flames/earthquake rule. He'd also had taken it upon himself in the beginning to watch their fights, to intervene if things got too out of hand; such as a couple of instances in the beginning. But he had decreased in his visits until recently he stopped all together.
Rin arrived in class, forcing himself to tug himself out of his thoughts and set himself up for a bored five-period school day just like usual.
After the normal class, Rin went to his usual door, fitted the key and stepped into the cram school hall. He gave a slight sniff of the dark unlit halls. He always preferred them to the waxy halls of the normal school. The exorcist school hallway smelled nicer, fresher. He guessed it was probably the herbs seeing as a class for third years trying to attain title of Doctor was right next to him. With a twitch, he caught a more flowery scent and turned to look down the hall.
"Rin!"
The ever cheerful Shiemi picked up her pace to jog over to Rin, smiling brightly. Nii greeted just as bubbly as its master, waving a fuzzy green arm and grinning toothlessly from his spot on Shiemi's headband. Rin grinned at his best friend. "Shiemi! How are ya?"
The blonde smiled and swung her bag happily, falling in to step with Rin as they made their way to their classroom. "I'm alright! My gardens are doing great! How are you and Yuki-chan?"
The rest of the school day blended. He remembered falling asleep to be sharply woken by Yukio slamming a book next to his head. He remembered Bon tching at his lack of conviction in training. He remembered him and Shima laughing over some dirty joke. An extremely normal day for Rin.
Then at the end of the day, Shima invited Rin to head into town with him and Miwa. Rin had at first lit up. Fantastic! He hadn't been able to hang out with the boys for a while! But...
"Sorry Shima," He said wincing slightly, "I promised a friend I'd meet up with him..."
Shima shrugged before snapping his head up and narrowing his eyes slightly. "What other friend? You've never mentioned other friends before. Are you av- OH!" the pinkette gave a gasp before leaning in, glancing from side to side, "do... do you have a girl? Is that who you keep disappearing to see?" he whispered with a grin. "Is it Moriyama-san?!"
Oh shit. Rin gulped, not knowing what to say. He didn't have 'a girl' per say. More three brothers... "Uh..."
"Is it Paku-chan?" Shima gasped and proceeded to invade Rin's space even more, "is it Izumo-chan?!"
Rin shook his head, glancing around. There just had to be some way to escape...
"So? Who is it?" Shima asked eagerly, "is it a girl in the normal classes?"
"Umm! I uh got go!" And with that Rin bolted.
He leapt down the hall, ignoring Shima's yells and threw himself through the first exit door. Popping out in the school's lab hallway, yanking a key out of his pocket. It was silver and looked menacing with its axe shaped lock pattern. Shoving it into the closest door, he pulled it open and shot through. He fell onto his front with an oof, unbalanced by the suddenly rougher ground.
SLAM
"You know you really shouldn't pose like that if you just want to fight today."
Rin shot his head up to see the demon King of Earth leaning against the now closed door, rolling a lollipop in between his lips. Flushing at realisation of his position and Amaimon's half lidded gaze, he got up glaring. He dusted himself off, purposely avoiding making eye contact.
The raven's face reddened again at the feeling of a pair of slender arms wrapping around his waist. Amaimon buried his head into the crook of Rin's neck, inhaling deeply.
"I missed you."
Rin sighed and returned the embrace. "We saw each other only last night!" At first he had been quite disconcerted by Amaimon's extremely affection, especially after the effects of the 'Event' had worn off, but the demon prince had little concept of space. So Rin had come to accept the Amaimon's hugs, kisses and obscure little gifts.
Amaimon purred and nuzzled his neck at the mention of the previous night. "You were so sweet last night," he mumbled, causing Rin to blush a brilliant red. He leant up to lick the raven's ear, "Wanna have an encore?"
Rin quickly shook his head, trying to dissipate the heavy blush. "S-sorry but I'm still sore from last night."
Amaimon let go at that, thankfully. Rin was glad that though Amaimon was more animal in nature, he never insisted and always backed off immediately. It wasn't like Mephisto or Yukio would harass Rin, no, they respected him, but they were always more reluctant to abate.
The green haired demon strolled his way into Rin's vision, flicking the stick of his lollipop into the grass. He then turned his intense cerulean eyes on Rin, lifting a fingernail up to chew. If it hadn't been for the fact that Rin had known him for so long, he would probably have missed the little clues of Amaimon's mood. Chewing his nails meant he was interested. Staring at him with such intensity was Amaimon's sign of undivided attention. He rarely voiced his emotions, more signalled them, like how a dog would wag its tail in happiness or a horse would flatten its ears in irritation.
"You ready?"
"Sure."
Rin had little chance to react as the demon King of Earth launched himself at him. Rin brought his arms up to block the blow and instantly Amaimon's face lit up, grinning a mouth of fangs and laughing in pure, childlike delight. Rin momentarily paused, staring.
He still wasn't quite used to Amaimon's sudden change in facial expression. One minute he'd be sporting a deadpanned expression, the next smiling with dazzling white fangs that never suggested his hyper sugary diet. It always left Rin a little stunned.
Amaimon, quick as always, bent down to sweep kick Rin's legs from underneath him. With a yelp, Rin went plummeting, only then remembering he still hadn't taken the Kurikara off. Sliding it out it's covering with practised ease, he swang it at Amaimon's head. Just because there was the 'no flames' rule, didn't mean Rin couldn't use his sword.
Catching the dark blue sheath, Amaimon swang him up and they both began to battle in the freshly generated hills.
One hour and several destroyed hills later, the two demons stood panting, staring at each other. With a single nod, they relaxed their stances and approached each other. Amaimon's face relaxed back into his usual neutral, already a lollipop in his mouth. Rin on the other hand, smiled and wrapped an arm around his neck. "You're getting better still!"
Amaimon stared at him, "You're progressing well yourself."
Rin grinned sheepishly, somehow a little flustered at that comment. In retrospect, it was silly that he would still feel embarrassed by a little comment like that, seeing as he had done much more 'embarrassing things' with the King of Earth (many were, not-so-surprisingly, suggested by Mephisto).
Lighter eyes bore into him. "Your face is red. Did you exert yourself too much?"
"N-no!" he said quickly flapping his hand (much to Amaimon's subtle confusion at the gesture). Though now that he mentioned he was starting to feel light headed... "I best be getting back to my dorm anyway."
Amaimon nodded and began to saunter away, crossing over to one of the multiple doors. Glancing back over his shoulder, he called out "See you later then," and disappeared down the door.
Rin gave a puff of relief to be finally alone for the first time in hours. He raised a hand to his forehead and frowned slightly. He supposed he just hadn't had enough time to rest. It had been a good while since he had a good rest, in between school, missions, Amaimon's sparring, Yukio's long study sessions and whatever wild shenanigan Mephisto had thought up for the Exwires, he hardly had any time to rest. As much as he cared for the three, they were a strenuous bunch...
Tracking down the casing for the Kurikara, he began to make his way back to the dorm. Going through his first door, he found himself warped a short walk from the dorm. Checking the overcast sky, Rin picked up the pace, hoping to beat the oncoming storm.
Much to his mixed surprise, as he approached the old dorm building, a certain person in almost offensively bright white stepped out. What was the clown doing there? Rin gave a wolfish grin when he saw the way he staggered slightly.
"Eyy Mephi!" he called out, startling the older demon.
Mephisto's green eyes widened and he jolted slightly, before relaxing at realisation it was only the raven-head. "Oh it's just you. For a moment I thought I had been found by Kirigakure-sensei," giving a mischievous grin, he nodded back to the grey dorm building. "I was just visiting Yukio."
Rin snorted, laughing. "Yeah, just 'visiting' hehehe!" he joked, poking Mephisto's side.
"Oh?" Mephisto's gave fastened onto the blue eyed boy's slightly tousled appearance, "been with Amaimon have you?"
"What?!" Rin's voice cracked at the implication. "We only sparred!"
"Only sparred?" He purred, leaning down.
"Yes!" Rin squeaked.
Mephisto laughed and glanced skyward to where rain began to sprinkle. Opening his umbrella, he began to walk away, signalling the end of the conversation. Rin was about to sprint to the cover of the dorm when he heard the older demon pause. Looking back, Rin was greeted by piercing emerald green eyes, watching him with scrutiny.
"You look flushed. Are you feeling unwell?" Rin shrugged. "Hmm... take care then..."
Rin had to quickly turn and run to the door as it began to bucket, not missing the popping sound of the King of Time activating his power. Swinging open the door, he nearly collided with Yukio. He grinned mischievously and flung an arm around his twin's shoulder, laughing. "Got lucky did we?"
"Nii-san!" Yukio practically screamed.
Rin burst out laughing at the mortified expression on his brother's face. "Bwahaha! I met Mephisto on my way back~! Besides you reek of him," He said giving the brunette a sniff. Yep, definitely. Mixed into his usual gunpowder scent, was the unmistakeable candy floss and some kind of incense smell that clung to the purple-headed demon.
Yukio shivered at the close contact, his pointed ears twitching. Grabbing Rin's arm, he lifted it up his head, detaching himself from the one-armed embrace. Rin pouted slightly, looking slightly rejected. Sighing, Yukio leant in to peck him on the cheek. Immediately Rin brightened and turned, catching his brother on the lips.
Yukio's ears turned crimson, causing Rin to laugh harder. It was almost surprising at how easily Rin could make his bespectacled brother blush, but as soon as they reached the bedroom, the tables turned. However, before they could continue, there was a quick pittar patter of tiny feet.
"Rin!"
Moving away from Yukio, Rin scooped up the little cat demon, cuddling him to his chest. "Hey Kuro! You had fun today?"
"Rin it's raining..."
"Hmm?"
"We can't go play now..."
Oh yeah, he had promised the Cait Sith that would go train tonight... With a grin he shook his head. "If you can ignore a little water, I'm game!" Well, a little water was a bit of an exaggeration of the almost storm outside.
Kuro's mouth opened in the equivalent of a kitty gasp. "Really Rin?!"
Rin nodded and the two bounded outside, leaving Yukio in the hallway, a warning to come in before they got sick on his tongue. Yukio sighed and pushed up his glasses. He was truly a most troublesome brother sometimes...
The next morning, Yukio awoke at his usual time and began to go about his morning routine. It was a Saturday, though Yukio had papers to grade, homework to do and other academic duties. His plans were disrupted however, when he began to go upstairs to begin his paperwork, he heard a frantic telepathic cry. Rushing to the door, he found Kuro batting at Rin's face, looking utterly distressed.
"Rin! Rin! Wake up!" the cat demon wailed despairingly.
Yukio rushed over and saw to his horror, Rin out cold, pale white and drenched in sweat.
"Nii-san!"
He began to shake the older twin, only receiving a tired groan in response. Yukio started to panic. It could be a fever, but it looked much worse, like he was experiencing chronic pain. Yukio stood up and in his stricken mind, the first cause of action was to rush to the door, ram a key in and jump through.
"Mephisto! Amaimon!" he bellowed, running into Mephisto's office.
Amaimon, who had been hanging upside down while eating, widened his eyes ever so slightly at the sudden intrusion. He dropped to a crouch on Mephisto's desk and stared at Yukio, "What's the matter?"
"Rin's sick! He needs medical attention now!"
Amaimon popped himself up and mumbled something, his eyes going vague for a moment, before snapping back to attention. He jumped off the desk and pulled out his own key, hurrying to a door. Yukio dimly recognised it as an Infinity Key.
Shoving it into the door, Amaimon flung it open and yelled "ANIUE!"
One of the doors down the now accessible hallway opened up, Mephisto popped his head out the door, looking disgruntled. The purple haired demon caught sight of their expressions and made a beeline for them, cape billowing behind him.
"What is it?"
Yukio frantically wrung his hands, eyes darting to the door still open to their dorm room. "Rin's sick and it looks bad," he huffed.
The trio went straight for the magically opened door to the dorm, though Amaimon hung back to watch from the doorway, chewing on a nail. Mephisto was at Rin's bedside in an instant; Kuro jumping away upon realising it was the King of Time. Mephisto gently picked up Rin's arm, feeling his pulse, while the other hand checked his forehead. With a frown, he carefully pulled the sheets back and checked on the raven's tail.
It was limp, the usually silky black fur was coarse and it was cold to the touch.
"Shit..."
Yukio flinched at the curse. It was a beyond ominous sign if the principal was using such language.
The eldest demon whirled around to face the open door, staring straight at Amaimon.
"Get the chalk."
Amaimon was gone in a flash but not a moment later, held a packet of chalk used for drawing up summoning circles. He tossed them to Mephisto and began closing the windows, plunging the room into near darkness.
"What are you-?"
Mephisto gave a hiss for him to be silent, Amaimon grabbing his shoulder and pulling him to door. "He needs to concentrate for this..." he muttered while completely taking off a nail in his chewing.
"Doing what?!" Yukio hissed.
Mephisto had already drawn up a perfect summoning circle, freehanded, and was beginning to write archaic symbols... to restrict an extremely high level demon.
Amaimon's hand crept down to talk hold of Yukio's. Yukio glanced at the green headed demon, seeing him now chewing his lip nervously. The very human gesture of seeking reassurance seemed so incredibly foreign, coming from the mostly emotionless demon king. He was beyond nervous. Frightened even...
Yukio squeezed his hand.
Mephisto began to chant, his words sounding German in origin, and the pressure began to rise. Rin tossed slightly in his bed, moaning, completely unaware of the ritual happening less than a foot from him. As the dark versus began to take form, the summoning circle began to glow. If it wasn't for that fact that Yukio was holding Amaimon's hand, he would have missed the slight tremble from the demon prince and him moving to stand further back into the office, hiding behind Yukio. What the hell was he going to summon?
As the last syllable poured from the oldest demon's mouth, a figure made of smoke began to form.
A/N: Wow this got long (nearly 4 thousand words jesus christ!), so I decided to leave it at a cliff-hanger. So basically I've only got a vague idea of where this is going. I've only got a few angst/fluff ideas so far... read, review, follow, like and enjoy!