A/N just couldn't help myself. I really love the aspect and found it cute. It's different as in this there will be classifications. Not just Caregiver but others are as well mentioned. With this hope you enjoy this chapter like I did when writing uwu. 

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Merlin had no idea how to deal with anything like this. He shouldn't be a little and from what he knows his mother will be pissed about this. As she never liked littles. For her they were a liability, and this was why he told her that he was a natural. Not to mention that he had magic, made her even like him less. He had been treated not well and he was glad that he would leave his so-called home behind.

Because of this, he had been scared for others to know about anything like this. Hell, even Gaius had not known about his real classification. But he knew that this would bite him somewhen in the ass. Not something that he expected, and he really was worried now.

Then again it should be obvious with him being way smaller as other people. But he as well knew that when he was in his head space his body shrinks to his age, which was young. He was close to a baby making this really difficult for him to slip.

But he couldn't. Not when he was a menservant. Adding with his magic and his destiny, there could just be things go wrong. Others were either Omega's, Alpha's, Neutrals, Master, Pet and then there was little's and Caregivers. The last two weren't that often and usually littles were looked down. As they needed to be taken cared of and needed attention.

That was why no one knew about this and he really wasn't wanting to lose his job and the people he by now seen as a family. There was as well the crush he had on Gwaine. Little's can have crushes, yet they never really feel the sexual urges like others.

The same was said with Caregiver. They could have crushes, as well but never the sexual urges. It made him even more careful. But he knew that he would end up being found out at some point and he really hoped it wasn't on one of their hunting trips. That could end up not well with him being a little.

Making this so much worse for him. He always had the things that were needed as he never knew when he could slip. Not that he planned to obviously but better be safe then sorry.  Even when they went, his bag had all necessary things. So far he managed to push his headspace away. And it went well so far it. But today he felt the dreading feeling that something will go wrong.
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(When doesn't anything go wrong, like Merlin you should know this by now. 

Oi, don't break the fourth wall you dimwit.

Yeah, yeah. Just thought I point it out because you seem to be forget that nothing ever is going well being in Camelot.

Okay, you got me there, let's just move on.

Good onward with the continuation)

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He shuddered as waking up and he felt sick. It was the kind of feeling that he hadn't had often. Usually his magic protected him from this. Yet here he was with a blaring headache. A migraine was coming yet he stood up and making himself ready.

Greeting Gaius, waking up the prat after getting the breakfast first. He had not even eaten something yet, but he couldn't' care less about this anyway. He wasn't hungry but nausea. Like always he pushed it aside, even making sure that none realized that he wasn't well. Then there came the dread fullness when hearing about the hunting trip. Yet he nodded and starting to pack everything that was needed. Even the bag that had all of his necessary things in it.

"Yo mate you good?" Gwaine asked and the concern flashed through the dark wood brown eyes. Making his heart flutter in warmth a knowing that he was caring for him. But something in the back of his head made him disagree. Telling him that as soon as he was found out both secrets, he would be leaving him.

"I am good, but thanks for asking. You?" He decided to steer the attention to Gwaine who answered the same way and then they started their journey. 

Everything went well but he could tell that everyone was concerned from their occasionally looks that were given into his direction. But he couldn't be bothered right now. He felt tired, had a killer headache and wanted nothing more then get some rest. This was why he was that silent and he wanted to slip so badly, but held it in. As he knew that none of his friends were caregiver and they had no idea how to take care of a small toddler.

Because this time he wasn't sure that he would end up big at all. He was pretty sure that when he would slip now than he would end up in this state for a more then a few hours. It was not even a surprise as he hadn't slipped since being in Camelot. Meaning that it was now a few months, scratch this a bit more then a year now.

Then it had to come at how it had to come. Bandits attacked and he was starting to slowly slip more. Not that he realizes this but one of the bandits. He had no idea what happened, but he suddenly was in the grips of this meanie. To make this even worse he was by now around 4 years old maybe. Making him wiggle around but the grip stayed tight around him. Making him start to scream loudly and even tears rolling down.

This was all that needed to make his big space being pushed away and all that was left was the little that he was. Until he was in his age, a bit less then one year old.  Everyone paused what they were doing and all staring at him. Making him cry even harder. His eyes went over to Daddy. He wanted Daddy to hold him and tell him that everything would be alright.

"Let go of him now." Daddy's voice sounded deep and growled this out. Making him shiver and there was as well a slight glow. This showed that he had found his caregiver.

"Nah, this little guy will have some really good use for us." The meanie said and he wiggled more around yet with his tiny body, there was nothing that he could do. An impulse went around, and everyone fell on the ground. Yet before he hit the ground someone catches him.

They held him strongly into his arms and he felt himself rocked softly up and down. Even some whispering reassuring words were happened. He sniffed but soon started to cry as he felt an uncomfortable wetness. He realized that he had wet himself.

"Shh, Daddy got you. Guys do me a favor and kick their ass. I have some things to take care of." Daddy's voice was soft at first but soon he was saying this louder. But he was too occupied with crying. They were walking somewhere and by now he had exhausted himself at sleeping. Making his eyes drop as falling asleep.

Transition brought to you by gay

His eyes opened and he was in the arms of someone. Or more like a fabric bound around him. He looked around and soon met with Daddy holding him close as they were riding. He looked around and snuggling into the chest of the male. A paci was in his mouth as he sucked on it with calmness.

"Oh look at this, our cute little dragon woke up." Lancy cooed and he flushed slightly hiding into the chest of the other. Right now, he was in a construction bound together with a blanket or something kind.

"Great now you scared him, good job Lancelot." A deadpanned voice rang out and he giggled at this. His head peaked out but soon hiding back into Daddy's chest.

"Well, we better get to Gaius later on and let him explain. Pretty sure the male must have known you being a cute little bee." It was said with Daddy and he peaked out and tilting his head. He couldn't quite grasp what he meant with this.

"That you're a little." It was said softly, and he nodded but not really caring enough right now. All that mattered for his little mind was having his Daddy here nothing else. He as well realized that he was hugging a bear plushy, making him hug it tighter.

"Do you need me to give you something, or are you good?" Once again, his Daddy asked, and he furrowed his brows but soon his stomach made some noises and he realized how hungry he was. Resulting into him bursting into tears.

"Hungwy..." He said between his sobs and it was difficult to talk right now. He felt just nonverbal right now and he was sure that he couldn't talk more then a few words in his little state that he was.

"Sorry, guys but we better take a break that I can feed my cute little bean." It was first explained as the horsie stopped and the last part was said in a silly tone, making him giggle but tears still rolled down.

"Alright, here we go." It was muttered and he titled his head but soon he seen something mush. He had no idea what it was, but it tasted well enough for him to not complain about what this was. When finished he got a careful (I just can't find the right wording right now) clap on his back making him burp.

Then they continued to go somewhere. He couldn't careless where they went as long as he would stay with his Daddy. That was all that mattered to him right now.

Another transition brought you by the cute toddler Merlin

He had been checked out by the nice Gramps and he was bored. The two were arguing about something and he was not interested in their grown ups talk. So that he was playing with Mr. Apple as he knows Daddy loves Apples so much.

"Hey, Merls what's the little guy called?" The familiar voice of Brother Arty made him come back. Resulting in him look up with big doe eyes and flushing slightly.

"Mw. App'e." He stumbled through the words and Arty chuckled as giving him a hair ruffle.

"Well that's a nice name you choose for Mr. Apple." He heard him coo, making him nod and giggle. Soon he was back occupied with playing with his plushy, his surroundings somewhere else.

"Alright, let's get you sorted into your new home, cutie pie." It was said with a coo and he made grabby hands for his Daddy to pick him up. He was instantly back into the arms of the other and soon falling asleep once again.

Another transition because my mind can't figure out what else to write

His eyes cracked open and to his confusion he was in a prison like cell. Yet the cell wasn't like the usual cell. It was confusing to him and he had no idea what was happening. It is creeping him out and even when sitting up everything was bigger. The room reminded him of a child's nursery.

Meaning that he was not in Camelot and it creeped him out. Because the last thing he remembered was being held by Bandits. Making him firmly believing that they got him and sold him to someone. Yet it made no sense as this place looked not like the person would hate littles. The opposite as it was thoughtful made.

'Great job Merlin. Couldn't I for once do something right?' He grumbled out and feeling moody now. He was still in his little body, yet his mind was in his 18. This was just not a good thing for him, and he took a deep sigh.

Merlin knew that it would bite him into his arse with not regressing. But for now, he was in his big mind. His eyes widen as he felt something wet and as well something gross down there. His body reacting differently then he wanted to, leading him to let out a loud wail. To his horror.

The door got thrown open and he braced himself for whoever would be there, but he had not expected to meet his crush. This was even more horrifying then when Arthur- nevermind he was sure now that the knights and Arthur know about him being a little.

Making him cry harder and he hated that he couldn't control his body like he wished he could. In his mind he was cursing himself for letting him regress and now he would be stick for sure longer. Just fantastic. Exactly what he needed. (Note the invisible sarcasm there)

His body was rocked softly yet he still couldn't stop himself from crying. Gwaine hushed in softly and humming a calming tune. Yet it was clearly not working as it was just upsetting him more. Soon the said made -to his horror- was looking at this bum. Making him wail just more and wiggle around.

"That explains it, my poor butterfly. Just you wait, Papa got you." It was said softly, and he sniffles turn softer and he blinked in surprise that the male had accepted this. It surprised him yet it as well warmed him as he knew that the male would accept this.

He was put down on changing table (Still not sure that it's the right word) and starting to change him. Making him wiggle and flush in embarrassment. God, he hated his life so much right now. When being clean his bum was patted softly making him giggle. Unintentional and he could feel the blush grow more.

"Well I am guessing your semi big right now, are you?" It was asked and this time a different tone used. One that he heard Gwaine talk when he was his big space. So, he nodding but he was too embarrassed to get something out.

"Alright, I know this was shocking for everyone but I had my suspicion. None blames you for hiding both things. Just lucky that Arthur isn't thinking like his father does. When your really back, we can talk about rules and all, but for now I won't go into details. Other that you won't fight back, hit me, talk back as well we do not say no to me when being little." Gwaine explained and he nodded because he gave up about arguing and fighting against his best friend and crush. Not after the male had accepted him.

"Good, let's get you some food and then how about we play, huh kitten?" Gwaine grinned down on him and he flushed because his mind was right now way older, but he really liked this. Maybe this wasn't too bad, with this he nodded and giving his own grin up to the male.