**Inspired by the song from Frozen 2 - Not a songfic!**

Simply put, Rin was hearing things.

It started shortly after the twins fifteenth birthday. Rin was 'attempting' to finish homework he had been assigned for the holidays before going back to school, but some pesky manga was in the way and distracting him again so the math had inevitably been forgotten. He would ask Yukio for help later.

He'd been sat in silence reading the manga when he first heard the noise. He looked up and around the room, he was alone and nothing had moved or fallen. He ignored it and carried on before he heard it again, this time he jumped, it almost sounded like someone whispering. He scratched his head looking at the time, it was late, he was probably just tired.

Yukio was out at some club with the old man again so Rin was left at home with the other priests. Most of the Monastery was silent, everyone else had gone to bed it seemed. Rin found it strange that a club could go on so late sometimes, but didn't really question it. He did sometimes wonder what sort of club it was that Father Fujimoto had to go as well though.

Rin closed his homework and the manga; he would try again tomorrow. Hopefully with Yukio's brains to help him. After brushing his teeth, he climbed into bed, draping the sheets over him, it wasn't long before he was in a deep slumber.

He wasn't sure what time it was when he jolted awake but was sure someone was speaking to him, he sat up and lazily looked around the room, a desk lamp was on and Yukio was taking off a jacket as he slid a locked box under his bed with his foot. Had Yukio spoken to him? He looked at the time…it was 2 am!

Yukio turned and nearly jumped out of his skin when he saw Rin sat up half asleep looking at him.

"Nii-San?! What are you doing awake?"

"Mm? Heard you talkin', woke me up…did you just get home?" Yukio was sure he

could hear the cogs turning in Rin's head, he'd always managed to get back from a mission unnoticed before.

"I just had some stuff to do before bed. Go back to sleep Nii-san." Rin didn't argue and grumbled something as he rolled himself back into the sheets, soon taking deep breaths as his sleep deepened. Yukio let out a breath he'd been holding on to, that was close. Did Rin say he thought he'd been talking? Yukio hadn't said a word since reaching the room. He didn't dwell on it further as his exhaustion was catching up with him, getting into bed himself.

Yukio took his glasses off, putting them on the table beside his bed. Getting comfortable nearly burying himself in the sheets as the warmth enveloped him. He was about the close his eyes when the blurry silhouette of Rin sat up again, looking around before laying down and putting a pillow over his head. Yukio was sure he heard him mutter a 'shut up' at the same time.

When Yukio awoke, Rin had already left his bed much to his surprise. He got up and left the room, heading towards the kitchen where the luring scent of breakfast met his nose. On entering the kitchen, he found Rin readily cooking, completely oblivious the Yukio having entered the room. He had been about to say hello when Rin froze to the spot looking out the window.

"Nii-San?" Rin snapped out of his stupor and looked at Yukio.

"Oh Yukio, it's you! Want some breakfast?"

Yukio nodded, giving Rin a curious eye.

"Are you okay? You seem a bit out of it."

"Huh? Yeah, I'm fine. Couldn't sleep, that's all." Rin gave a nervous laugh, he stiffened briefly before shaking his head and continuing with breakfast.

"Are you sure?"

Rin hesitated before opening his mouth to answer but was interrupted by the arrival some of the priests having been lured in by the smell of food. Soon enough everyone was gathered at the table for breakfast. Although Rin just sat picking at his food whilst looking out the window.

Rin was sure the voice had gotten louder over the duration of the day. He was pretty sure now this voice was in his head, as no one else seemed to be hearing it. What he hadn't figured out was why he could hear it and what the hell it wanted. He had a feeling it wanted help, but how was Rin supposed to help a voice in his head. So, he chose to keep ignoring it. Maybe it would stop if he just pretended it wasn't there anymore.

But ignoring it proved more difficult as time went on. Even more so when they had returned to school. Rin had trouble concentrating in classes as it was but the voice had just gotten louder and more frequent. Today was more troublesome than usual, his head was pounding and the voice was more persistent than ever, his head was face down on his desk; hands scratching through his hair. The students were giving him strange looks; well stranger than usual. Before the teacher finally took note and called his name.

He couldn't hear her voice over the voice in his head, so she marched over to his desk slammed a book down and shouted his name.

"Mr Okumura!"

Rin snapped, snarling at her.

"SHUT UP!"

Punching his fist into the desk, it broke in half. The teacher backed away in fear. The rest of the class flinched and edged away before the hushed whispers of his classmates broke through the voice in his head and Rin looked around taking in his surroundings. He ran out of the room without another word. Yukio darted after him.

Rin ended up running out of the school's front doors a few teachers yelling after him, but he was too fast for them to catch, Yukio followed but the teachers had been alerted enough to stop him from going any further.

"Somethings wrong! I need to go after him!"

"Mr Okumura, please return to your class. We will contact your guardian in this matter."

Yukio gave a frustrated grunt but begrudgingly walked back to class, where the rest of his classmates gave him a fearful look on his return. He ignored them to return to his desk trying to block out the whispers about how much of a demon his brother was.

Rin ran as fast as he could, he felt like he was trying to outrun the voice in his head as well as the sight of his school but he had no idea where he was running to. He eventually found himself at the park near the Monastery, it was quiet thankfully still being within school hours. He flopped into a nearby swing letting his feet drag across the dirt as he swayed back and forth. The voice still singing some sort of siren song within its mutterings and whispers, anything to get him to listen and follow it. He stared up at the sky, taking a deep breath and closing his eyes. The voice sang and he could see a flickering blue in his mind, he felt an overwhelming warmth from it.

When he opened his eyes and looked ahead, a flicker of blue light appeared from within the trees. It disappeared as fast as it had appeared. Rin stood and walked towards where he had seen the light, as he approached the entrance to the trees another blue light appeared a little ways further in, the voice singing with every appearance the further in he went. When he got to a clearing the blue light was in the middle, flickering like a flame. It disappeared as Rin approached it.

Rin waited a while but the light did not reappear, had he been seeing things? The voice had been quiet as well. He made his way back to the Monastery; school was still in session but the old man knew by now he'd left anyway. He let himself in but the place was empty apart from the older man Misumi pottering around cleaning between the pews. He was about to ask what Rin was doing home, but Rin just gave him a look that he wasn't in the mood. He began to walk towards his and Yukio's room when the voice suddenly sang when he walked by his father's room. He froze, feeling instantly compelled to go in.

He knew he probably shouldn't go in without his father here, he walked away and the voice sounded again – louder this time. He bit his bottom lip and went back slowly opening the door hoping it didn't creak and alert Misumi to his snooping around. When he entered, he wasn't sure what was so special, it looked the same as it always did the many times he'd been in here before.

He moved around the room and the voice sounded as he walked past a large red ornate chest of drawers, it looked out of place compared to the rest of the furnishings. He studied it further, locks on every drawer, so not a normal chest of drawers then – somewhere his father could lock stuff away. He tried every drawer out of curiosity but they were all locked. He sighed and gave up walking away towards the door, the voice sounded louder. He felt something this time, a feeling that came strongly with the voice. Whatever was calling to him was in this drawer.

He looked around for a key, checking around the furniture and within the drawers of the desk. He managed to find a key within his father's bedside table and it worked, unlocking and opening each drawer. Mostly papers and strange books with weird symbols, if anything it looked like his father was in a cult. He laughed off the idea – disappointed that whatever was calling to him was not here. Opening the last drawer at the bottom he was shocked to find several guns that had been stowed away for safekeeping. Why did his dad have guns?! He quickly closed it again and locked the drawers back up, putting the key back in the drawer he'd found it.

He went to move out of the room again when the voice sang to him, he could definitely feel it. His arm moved of its own volition placing his hand on the cabinet; a spark of blue appearing as his fingertips touched the wooden surface. He was drawn out of his trance when Father Fujimoto entered the room after seeing the door ajar, Yukio following behind.

"Rin?"

He snapped up at them, with the look of a deer caught in headlights. Quickly moving his hand away from the cabinet of drawers. His eyes were suddenly drawn to a strange-looking key hanging from his father's neck. The voice sang again.

"What are you doing in here?" Shiro said, pulling Rin out of his daydream.

"Oh, hey…um sorry I thought I heard a noise in here so I came to check what it was." He quickly ducked his head and made a break for the exit, gently pushing past his father and Yukio in the process running down the hall to his room.

Shiro and Yukio gave each other worried looks. He gave Yukio a pat on the shoulder and went to talk to his oldest son. Standing outside the twin's room he knocked on the door hearing Rin grunt from the other side he entered, seeing Rin on his bed with a manga in hand. Swiping the manga from his grasp he pulled a chair up to sit next to the bed. Rin gasped as he lost the manga he was reading and pouted at his father.

"So…"

"What do you want old man?" He laid there; arms crossed, staring at the wall next to his bed.

"What happened at school today? Teachers said you snapped and broke a desk and then ran out leaving the school grounds."

Rin didn't answer, finding that glaring at the wall was much more interesting.

"Rin…" there was a threat in his voice, causing Rin to look at him before he regretted it.

"It was an accident…my head was hurting and it was just too noisy, she just came out of nowhere and slammed a book in front of me, I lost it for a second. I didn't hurt anyone…just the desk." He felt the need to get in that last part before he was blamed for beating someone senseless again. "I left school and just went to the park; it was quieter there."

Shiro's expression softened slightly "Yukio says you've been having trouble sleeping, and you've been spacing out a lot lately." Rin frowned at his father.

"Damn Four-eyes." He'd muttered under his breath; Shiro still caught it raising an eyebrow "It's nothing, I'm fine."

Shiro nodded and soon moved to leave.

"Well anyway, you've been suspended from school for the rest of the week. The teacher felt threatened, so you will have to apologize." Rin had been about to protest but Shiro put a hand up to stop him "I will call you for dinner. Try and rest, Rin. Lack of sleep isn't good for you."

Rin nodded, snatching the manga back off Shiro as he walked towards the door.

"Did you find what made the noise in my room?" He eyed Rin suspiciously for a moment, Rin didn't notice to engrossed in the manga and trying to blot out the voice from his mind.

"No, must've just been hearing things." It wasn't a lie; he had heard something. But he felt his father might get a bit too worried about him if he admits he's been hearing a voice for a few weeks now. His mind drifted back towards the key, glancing at it briefly before Father Fujimoto left the room. The voice in his head sang again.

Frustrated, Rin shook his head running his hand through his hair as he did so. If it wasn't weird enough that he'd been hearing the voice to begin with, then there was that blue light in the park. Now he'd uncovered something his Father was hiding; he was a priest, a councillor what the hell did he need guns for?! He was sure there was more, the voice was leading him to something and it had something to do with that key around his father's neck.

"Aaugh! This is insane. The old man doesn't have some secret life…" Or did he? He was always out on business when not running the church, staying out late with Yukio at random clubs. "Wait…" Rin jumped off his bed, giving a quick listen down the hall for any sign of someone approaching before diving to the floor by Yukio's bed. He rummaged underneath for a few moments moving a few things out of the way before he found the locked box and pulled it out. He gave it a small shake, something solid and quite heavy was inside, but where would Yukio have put the key. He was about to look when the sound of approaching footsteps stopped him, quickly shoving the box back under the bed and moving things in front again. He jumped back to his own bed, grabbing the manga in the process as Yukio came through the door.

"Nii-san I brought your homework from school." He said as he put a large stack of paper on the desk. Rin groaned.

"You can't let me enjoy my suspension, can you?" He glanced up from his manga.

"Not when this is our final term, you need to think about what you're going to do after school ends." Yukio looked at him pitifully but sighed when Rin was staring off into space again. "Nii-san?"

"Huh?"

Yukio shook his head "You're hopeless." He sat down at his desk to do his own work.

Rin sat with his face in his manga, quietly listening to the voice singing in his head. He'd hoped he could ignore it but that seemed to be downright impossible. If anything, the more he ignored it the louder and more intrusive it got. But he had a feeling if he followed it, it would take him away from everything he knew now.

When he awoke the next day, he realised he was alone; Yukio was gone. It was silent in the Monastery. He stretched as he sat up, taking in the bright sunlight coming through the window. He got up and left the room, moving towards the kitchen. The first thing he noticed was a note on the fridge. Yukio had gone to school, the old man a few of the priests had gone to do some church business, the others were out for groceries. He was left alone? The note also said Rin wasn't to leave the grounds…well, he'd soon see about that. He opened the fridge to find some leftover breakfast, quickly shovelling it down before going back to his room.

He got dressed quickly with every intention to defy his father and leave the church. But the black space under Yukio's bed caught his eye again. Yukio was at school, and he was alone in the Monastery for a while. Really it was none of his business what was in the box, but after finding what Father Fujimoto was hiding away and knowing they had been going to some special club most days after school he was growing suspicious. He rummaged around Yukio's drawers beside his bed and in his desk until he found a tiny silver key that had been hidden beneath some old school books. Pulling out the box from under the bed, he successfully inserted the key and turned. He was going to feel stupid and guilty when he found nothing, this was Yukio of all people his brother. He closed his eyes and took a breath as he opened the box, squinting he slowly opened his eyes.

He inhaled sharply at what he found. Touching the cold metal surface of the two handguns, he jumped when the voice sang again. He heard a door slam shut from within the monastery and quickly shut and locked the box back away, chucking the key back into the drawer. His breathing sped up as he tried to take in what he'd found. Both his brother and father had been hiding guns in their home. He heard one of the priests calling his name. He answered back so they knew he was still here, then when he was sure they'd leave him alone for a while he opened his window. He climbed out carefully before jumping down to the ground below with a thud.

He turned and had to blink quite a few times as he was pretty sure he was seeing spots. Black floating, ping-pong ball-sized spots… he rubbed his eyes, they were still there. He had a closer look to see they had eyes, big green bulging eyes. He poked one with his finger, flinching back when it squeaked and stared back at him for a few moments before wriggling and floating away again. He cautiously made his way to the gates the black things were mostly ignoring him, he had to swat a few out of his way but they weren't trying to bother him at least. He ran towards the park feeling the voice pulling him in that direction again.

When he arrived again it was almost empty, most children being at school. There were only a few mothers with their little ones playing in the sandpit. They glared at him briefly, thinking that he might cause trouble, but he just ignored them and made his way to the overgrowth of trees and shrubbery that he'd seen the blue light before.

He approached the clearing and the blue light appeared before him, the voice singing again. He knelt in front of it, on closer inspection it looked just like a blue flame. For some reason it felt familiar, holding his hand out to touch it he realised it didn't burn but was warm. Suddenly there was a rustling in one of the bushes, he withdrew his hand from the flame and scooted away from the noise. Did the priests find him missing already and come to find him?

No. What emerged from the bush was a small round creature with tiny legs and huge arms, covered in strange markings. A few more followed behind all different sizes. Rin stared in shock; he'd never seen anything like them before. Where they some sort of animal? If they were, they were freaky looking. They stared at the flame before turning to Rin, sniffing as they cautiously approached, they seemed more wary of him that he was of them at this point.

He reached out a hand towards the closest one, he sniffed him before letting out a purr and nuzzling into his hand. The others soon followed suit much to Rin's surprise; he was soon surrounded by nuzzling, purring little critters. The flame flickered calmly while Rin played around with them; hidden within the trees. It felt like he had a friend for the first time ever, someone that didn't judge him for being different and saw past the demon he was made out to be.

The blue flame flickered away and the creatures scattered away into hiding again. Rin had a look of hurt for a moment before he realised, they were not running from him. The sound of someone calling his name soon brought him out of his thoughts. The sound of footsteps approaching from the park, they'd found him. Rin sighed. Rin stood and made his way out of the trees, one last look back at the clearing to see a tiny slither of blue flame before it disappeared completely.

He was scolded for his disappearance when he emerged from the trees by the priests, they would probably tell Father Fujimoto when he returned as well. On the way back he'd had to swat away a few more black bugs that had been hovering in front of him, this did not go unnoticed by the priests who in return looked at him with some form of worry.

On return to the Monastery, Rin immediately returned to his room without a word to the other priests. He knew it now more than ever; the voice was trying to show him something important.

Nagatomo watched as Rin walked down the hall and waiting till he was out of earshot before dialling Shiro on the phone.

"Fujimoto, I think Rin has started to see demons…"

Shiro had tried to make any excuse possible to get out of work, needing to get back and explain things to Rin, it was like that bastard clown was trying to keep him busy on purpose. Nagatomo had said Rin had been noticing the Coal Tars floating around but apart from that nothing else seemed to be different. He'd snuck out to the park, but there were others there and nothing suspicious seemed to have happened. He felt relief knowing that and that Rin hadn't awakened, the seal had just weakened. Maybe he should speak to Mephisto first, find out how best to approach this. He would like to keep Rin hidden, just in case but he can't keep him home forever; he still had school to attend. At least he was suspended this week.

He raised his hand to clutch onto his chest, feeling for the familiar weight of the Kamikakushi Key that hid Rin's secret. Not feeling it immediately he froze, further investigating his garments; the key was gone. But where? He never took it off it was far too valuable for that! He searched his office, to his horror it was nowhere to be seen. How did a magic key just up and disappear…then it hit him – that damn clown.

He stormed off to Mephisto's office, barging in without knocking.

"Mephisto! You damn clown, did you take the Kamikakushi Key?! I swear it was around my neck when I arrived and now it's gone! You're the only one that would've spirited the thing away."

"Ah Shiro, I'm hurt you would think so! I have done nothing of the sort." He said with a sly grin. "Maybe you just misplaced it at home by mistake."

"I had it when I came to work, I'm sure of it!" Shiro growled.

"Are you though? Key's are quite easy things to misplace. Maybe you should return home and look for it."

The look on Mephisto's face made him uncomfortable but he nodded, wanting to return home anyway and check on Rin. He could've just phoned and asked Nagatomo to check for it otherwise.

Rin returned to his room after the priests had retrieved him from the park, on entering he noticed something glistening on his desk. He walked closed to see a strange-looking key, the same key that had been hanging from Father Fujimoto's neck. The voice sang in his ear as he stared at it, this key was important for something; something to do with him. Gripping it tightly in his hand the voice urging him to use it, he wondered for a moment where but soon realised it had something to do with that red cabinet in his father's room. Now was as good a time as any with only a few of the priests to supervise him.

He poked his head out of his room and looked both ways down the hall, no one was around. From the distant sounds, he could hear the priests were in the kitchen preparing things for dinner. He snuck to Father Fujimoto's room; it was locked. He sighed, disappointed; he turned to return to his own room defeated when he heard a lock click. Hesitating he tried the door again; it opened this time. That wasn't creepy at all…

Giving another listen for the others he pushed the door open and slid through what little gap he could make before closing the door again with a silent click.

He listened at the door briefly to make sure no one had heard and come to check what he was doing. The voice sang again, drawing his attention from the door towards the cabinet of drawers. Running his hand down the front and stopping at the middle drawer, the same one he'd felt the spark from before. He took the key in his hand and put it in the lock; his hands now shaking from the anticipation of what was inside, what his father was hiding. With a soft click, he unlocked the drawer and opened it.

Inside the drawer was a beautiful sword, blue scabbard decorated with silver trim. He ran his hands over the cool surface instantly knowing this was what the voice had been leading him to this whole time. He picked up the sword from the drawer and examined it closely, there were remnants of paper burnt away where the hilt met the scabbard. He could wonder why his dad had a sword hidden away, but he could ask the same about the guns…

The guns were strange and worrying, even more so since his brother had his own hidden for some reason. But the sword felt special; at least to him it did. There was something familiar about it and the voice was practically screaming now that he had it in his hands. As if he was in a trance his hands moved of their own accord, one to grip the hilt as the other held the scabbard. Something inside him was bubbling up with joy.

His arms tensed to pull as someone opened the door to the room. There was a yell that didn't register before the blade was drawn and he felt his body explode with some sort of energy before the room was flooded with flickering blue light.

There it is, hope you like it. There might be a follow up if I can think of how to continue but we'll see since I already have two other fics on the go xD. It was my intention for this to be a one shot but I kinda feel bad just ending it there.