The empty hallways of the factory echoed with the footsteps of the young monster who snuck into his father's factory after hours. He was curious, as was to be expected of a young werecat. He wanted to see a human and how dangerous they really were. How scary could they be if monsters collected their screams for energy? If you scream, you are scared. How can that be as "dangerous" as his father always seemed to say?

He walked right up to a large "Scare Station", as they were called, and turned it on. He had seen the process hundreds of times when his father would show him off around the factory. The young monster, Chat Noir, had shadowed some of the best scarers so that he could learn by example. He typed a random number and called a door to him. He had no idea what door he called; he just typed a number 5239284. He liked the noise those particular numbers made when he pressed them. He was a bit of a strange monster.

The door that was summoned from the vault was nothing spectacular. Still it would serve his purpose. He took a deep breath and decided he was gonna scare the pants off whatever human he came across. He would make his father proud of him.

A young girl was asleep when she heard a door creak open. The door not only made a soft creaking noise but a small light flooded her room. She bolts from bed and looks around. Her room was now in darkness again, and her bright blue eyes grow wide. She crawls out of bed and looks around anxiously, unaware that there was something behind her with glowing green eyes.

She then turns and sees the two eyes, and the monster roars loudly in her face. Marinette's eyes grow wider as she blinks a few times. The voice roars again but it ends in a squeaky cough.

"….. this is where ya supposed to scream already," the voice said. It was obviously a child's voice.

Marinette blinks again, " W-Well… I won't because I am not afraid of you!"

The young monster pouts and is at a loss for words. This NEVER happened to the other monsters. No one trained him for this. "Well! Uh…. I don't know what to do now…."

The human girl was dressed oddly, like she was trying to become a monster herself. Hardly any of her human skin showed and was covered in some kind of red and black spotted material. To him it looked like fur it had a zipper in the front… How weird! If she wanted to be sneaky and sneak into the monster world she had to have a better disguise, with no obvious zippers. On top of her head was a hood with little antennae. She looked like a very rare ladybug monster.

"You have weird pajamas," she ended up saying.

He frowned, "These are not weird! And they aren't Pajamas! I am a scary monster who comes outta your closet!"

She outright laughs at this. "You are hardly scary looking…" she than sees his cat ears and tail and smirks. "Kitty. You are a kid just like me! I am not afraid of a kitty cat!"

"I am not a kid! Or a kitty! I am a fierce werecat! I am a monster"

"Oooh how scary! Whatcha gonna do? Meow at me… get tangled up in my yarn?" She holds up her failed knitting project with a bit of string hanging off it. His pupils gravitiate to the string. Darn his cat tendencies, he will fight them! He will not give in and give this sly human a reason to gloat.

He will fight and fight he did… for five whole minutes. He sourly played with the projects string while the girl laughed at him … taunting him. He will have REVENGE!... As soon as he had revenge on this string.

Once he finally conquered the darn thing he looked at the smug girl. She was right, she looked no older than him. She looked about five or six. Somehow this annoyed him more and he pouted.

"What's wrong, Chaton ?" she drawled out in a teasing tone.

He bristled at the name "You are like five right? "

"Just turned six years old!"

"Yea, you SHOULD be afraid of monsters! Why aren't you afraid?" he was clearly frustrated. "I did everything right… until the end, but I did EVERYTHING like the others and the other kids were scared!"

"Monsters are big and scary… you are small and cute." she said with a grin.

He fights a small blush, no one has ever called him cute except his mom but that was a while ago. He waved it off and pouted.

"Am not! Just you wait! When I come back I WILL be big and scary and you WILL be afraid and scream your head off!"

The little girl laughs so hard her hood comes off and reveals her midnight blue hair in two tiny little pigtails high on her head.

"Good Luck with that, kitty~~"

"Stop calling me that!"

"Nope! Never!"

"Ugh ! No one ever said humans were so annoying!"

"I am going home!" he announced as he stood up, clearly an agitated lil cat, which only served to make the girl laugh harder at him

"Bye little kitty monster! By the way! My name is Marinette!" she called before he slammed the door. She jumps out of bed and runs to the door only to reveal her closest.

"Huh? Where did he go?" She looked all in her closest until she fell asleep in the closet. Her parents were highly amused to see her in there when they went to take her to a doctor's appointment.

Marinette was excited to see him back a few weeks later. He tried so hard to scare her, but she was not a bit scared. He kept vowing that one day she will be scared so bad she wouldn't be able to sleep. He would never announce when he comes or even have a pattern cause he wanted to catch her off guard but he was as unlucky as his namesake and he could never scare her.

However as the years went by, they began to form an odd sort of friendship. It started with him staying longer after his failed attempts at scaring her. She started noticing that he was quite a scrawny kitty so she'd sneak food up and he'd devour it. Him staying longer managed to loosen his tongue a bit and they'd talk. Talk about their day and then their lives, families, worlds and hopes and dreams.

She was the one who celebrated his birthday when his father didn't even bother to.

He was the one who she confided in when her bully Chloé Bourgeois had made her feel bad about herself.

They were the closest of friends by the time Chat Noir eventually slipped up and was caught by one of his father's employees.

Three long but happy years came to a screeching halt when his father called him into his office.

"Chat Noir, how dare you go against me?" His father, Hawkmoth, growls at his son. His son's face goes deathly pale.

"What do you mean?"

He shoves a folder into Chat's face and he sees there are photos of him constantly sneaking in to Marinette's room over and over.

"How long Chat … How LONG?"

"Three years," Chat Noir replied, trying to keep his voice level.

Hawkmoth nearly exploded in cold fury. Granted no one would really know but Chat Noir and Hawkmoth's personal assistant.

"You have been defying me for three years… with a HUMAN of all things! Don't you know they are toxic?"

"Marinette is NOT toxic. I am not dead or anything."

"She is lulling you into a sense of false security. You will lay down your guard and then end up like your mother… Do you want that?!"

Chat Noir flinches at the mention of his mother. No one knows what had happened to her except that she went to the human world one to many times, and possibly bonded with a human child and was caught by their parents. She hasn't been heard of in years.

"I am putting an end to your foolishness! Tonight will be your last night. I am destroying her door in the morning." Hawkmoth storms out of the room, leaving Chat looking pale and depressed. What was he going to tell Marinette?

Chat spends the rest of day in a combination of being absolutely miserable and shopping for Marinette's goodbye present. He eventually found it. An enchanted hair clip that a local witch claimed was infused with Good Luck. It was of a Ladybug, just like her monster name from their youth. The witch herself seemed to resemble a ladybug herself. She had a red and black color scheme and bright blue eyes. He cradled it in his arms as he took it to the factory. He waits there as his father's employees are already setting up her door for its last use, and it made him sick to his stomach but he kept his face blank. When the door finally activated, he took a deep breath to calm his nerves. He strolls in and closes the door behind him; no way did he want anyone to report to his father how this meeting went.

Marinette wasn't in her room yet. He could smell her family having dinner downstairs. He heard the voices and the laughter, and he wanted nothing more than to be a part of it. Now he will never have the chance.

Soon enough, he heard Marinette wishing her parents goodnight and her bolting up the stairs to her room. The latch door opened and he looked at her with a blank look.

"Kitty? What are ya doing here so early?…." She asked gently as she closes the hatch. "What's wrong? Talk to me…"

"He found out, Princess…. My father found out."

Her eyes grow wide and she pets his ears. "He isn't happy… at all." His ears droop down. "He says your toxic, and …. He will destroy your door in the morning." He looked utterly miserable but she was confused.

"Destroy… my door?" She asked carefully.

He sighs and leans on her, "Our worlds are connected by doors. There is a copy of your door in my world… in my Dad's scream factory…"

Her eyes grow wide in understanding, "So if he destroys the door…."

"He destroys the link, and I won't be able to see you again."

"… Oh Kitty…" Her voice cracks and her eyes begin to water. "I don't want… "

"Me neither… but I can't do a thing about it and…" he makes fists. "I can't fight him right now…."

She hugs him tightly, "I will miss you so, so much…."

He returns the hug and when he lets go he pulls out a small drawstring bag. "Here… I got you a present … so you won't forget me… It's apparently enchanted with Good Luck… because heaven knows you need it," He said in a teasing tone, trying to lighten the somber mood. She sticks out her tongue and opens the bag, the hair clip slides into her hands "Oh… it's beautiful…" she whispers and puts it in her hair to clip in her hair.

She pouts. "I don't have anything to give you …. OH I know! "

She runs to her dresser and pulls out this old style Polaroid camera.

"One of my aunts went to Japan and this is a new craze from there. Bring back old style instant Polaroid cameras with cute little designs. She took a picture of a surprised Chat and smiles as she shakes the picture to reveal the image. His eyes blown wide and mouth open and it looked hilarious. She giggles as she hides it from him so he doesn't take it.

"Let's take some pictures! Then you can keep some of them … to remember me." She smiles at him and he grins.

"Ok" He said and off they went, taking so many photos.

Time flew by and for a moment they forgot that it would be their last night. They took a lot of photos and so many different types. Silly pictures, normal and model-y style photos, but mostly silly.

Eventually they run out of film and they sort through the pictures. They took about twenty six photos and Chat ended up taking most of them. He treated them like they were the most precious treasure.

"I will keep these photos on my monster self forever… I won't let my Dad touch em and take em," he said fiercely and then he hugs her.

"I gotta go Marinette…. Good night…"

"Yea… bye kitty… maybe when we grow up we will see each other again."

"Maybe… I hope so… someday."

He hides the photos in a secret compartment in his clothes and goes into the closet and returns to the monster world to the cold eyes of his father.

"It's time, son… You know I only do this to protect, not only you, but all of us."

The employees disconnect the door from the frame and ceremonially ground it before Chat's eyes. He stared as the door became pieces but kept his composure well. He takes a shaky breath when it is all done and excuses himself to his room.

He refuses to speak with his father for a few days, not that Hawkmoth ever sought out his son, even before him finding out about Marinette. He also never lets his father know about the photos and never let them out of his sight.

Over the years they put each other in the back of their mind.

Chat Noir had to deal with Hawkmoth and his own plans for his son. To be a model monster and scare every child he could.

Marinette had to deal with growing up, school, bullies, and her own dreams of becoming an amazing fashion designer.

They never thought the off handed comment Marinette made that night would come true.

Author's Note:

Well Hello... AGAIN XD

so this is gonna be my second multi chapter Miraculous: Tales of Ladybug and Cat Noir fanfic and AGAIN it is another AU cause I am AU trash. XD

So here are some things I want to note. Adrien and Gabriel do NOT exist in this world. They are Chat Noir and Hawkmoth.

This is a Monster's Inc inspired AU so there will be a lot of elements from the movie in this AU but with my own twist

I have already fully planned this AU and it will be 10 chapters long.

There will be no set schedule on this and my beta is again the awesome Rosalind2013

Happy Halloween~~