A/N: My first fanfic in the Miraculous fandom, but I've been a fan for far longer ^.^ A friend requested me to finally write something about Marichat so I decided to give it a try. Since it's my first fic about them, please feel free to give out any suggestions on improvement! :) Accepting prompts!

Disclaimer: I don't own Miraculous Ladybug or any of its characters!

Prompt: Chat Noir is jealous of Nathaniel

Rating: K+

Enjoy!

A Jealous Cat

Chat Noir searched high and low, swinging his baton and jumping from tree to tree, scanning the area where the akuma attack had just been moments ago.

Ladybug had purified the akuma, but there were still civilians around and he had to make sure they were all alright since his lady had important business to return to. The attack happened in the area near their school, maybe some of his classmates were around.

He knew one thing – he did see Marinette before the akuma rampaged, but then she disappeared and he thought she might have searched for cover just as Ladybug appeared, ready to engage their foe.

Seeing the familiar girl in the park near his school, he quickly headed in her direction, "Marinette! Are you al-" stopping mid-sentence, Chat Noir landed on his feet and retracted his baton, tilting his head to the side as he watched the scene before him.

Marinette, looking disheveled, helped up a dazed Nathaniel, the red head immediately blushing when he noticed their close proximity and her hand on his shoulder and chest, steadying him. He blushed even more when Marinette placed her hand against his forehead, thinking he may be running a fever due to the redness on his cheeks.

A low, rumbling sound reverberated somewhere deep within his chest and Adrien was startled by the sound. Did he just…. growl? He shook his head, walking over to the pair.

"Are you alright, Nathaniel? Did the akuma hurt you?" a tingling sensation shot down Chat's spine, the tone of her voice sounded familiar, a bit like his lady when she would be worried over civilians or himself.

Nathaniel still looked a bit dazed, though more so from the girl before him than the actual akuma attack itself, "I-I'm fine, M-Marinette, " his gaze roved over her figure and his eyes slanted in concern, "Are you hurt a-anywhere?"

To Chat Noir's relief, she shook her head but his eyes narrowed suspiciously when she absentmindedly gripped at her forearm, where the cloth of her jacket was slightly torn, "I'm fine, Nath,"

Chat Noir bristled, feeling the hair on the back of his neck standing on end.

Nath? He never noticed they were that close. At least, whenever he was in class they didn't really seem to talk much except for group projects or the occasional greeting.

"Marinette!" his civilian side felt guilty for the disappointed look on Nathaniel's face when he saw the leather clad superhero, but his Chat Noir side grinned in glee and he couldn't explain it either. Maybe it was Plagg's influence, "I was looking everywhere for you, are you hurt?" his concern was genuine and he dared her to lie to him, her hand still protectively hiding the torn part of her jacket.

She smiled up at him and his expression softened, "Chat Noir! I'm fine kitty," automatically, her gaze scanned her surroundings, "Uh, where is Ladybug?" she smiled nervously and he sensed her unease.

Was she afraid? But the akuma was defeated...

He scratched at the back of his neck, messing up his hair even more, "She left early to check on things," his attention shifted to her arm, "Are you sure you're alright?" he inclined his head toward the spot she was clutching onto.

Marinette froze, looking like a deer caught in headlights as she laughed it off, "Yes, yes, I'm fine don't worry! Thank you for saving us Chat Noir," she suddenly looked at his ring, "A-ah, don't you have somewhere to be?" looking at his ring and seeing only three paw spots, he looked back at her.

"I've got time," he could see she was trying to downplay her injury and he was determined to see it even if he risked his identity. His gaze slid over to Nathaniel, "What about you?"

The young student look startled, "I-I'm fine," he cleared his throat.

Chat Noir nodded, scanning his figure briefly before deciding he was indeed alright. His gaze shifted to Marinette, eyes narrowed and arms crossed over his chest, "Is there something you aren't telling me, princess?"

His lips stretched into a smug smile when Nathaniel looked like he nearly suffered a heart attack, "P-Princess?" he stared at Marinette and the girl looked like she would either want the ground to swallow her up or hit Chat Noir with her bag.

The leather clad hero grinned devilishly and slid right up to Marinette, draping one arm around her shoulders casually, his grin wicked, "Yeah, my pawsome purrincess! When I'm with her I'm feline good-"

"I-It's just a joke!" Marinette slapped her forehead, her nervous glance at Nathaniel turned into a soft glare in Chat Noir's direction, "Chat Noir-"

He cut her off, removing his arm from her and now stepping in front of her to look seriously into her eyes, "You're injured, Marinette," she was startled at how gentle he was when he pried away her hand to assess the damage on her forearm.

There was a small cut there, but nothing serious, he looked into her eyes again seriously, "You don't need to hide anything from me, after all my purrincess' safety is my first pawriority," he smiled and winked at her and for a moment, Marinette forgot her annoyance, offering the superhero a smile in return.

Nathaniel watched the exchange with surprise, how did Marinette behave so calmly around a superhero? Why were they acting so familiar with each-other? Marinette was usually shy and sweet so how comes she could show her annoyance around someone as Chat Noir?

His miraculous beeped.

Chat Noir frowned, glaring at it. He knew he needed Plagg to recharge but…didn't he wolf down enough camembert before?

"Well, looks like it's time for a little nap for this cat," he tapped his beeping ring playfully, "Marinette, Nathaniel, you guys should go back to school and get that treated, alright?" he looked meaningfully at the girl and she nodded.

"Will do, Chat Noir. See you around," she smiled and waved.

Chat grinned, giving her a two-finger salute as he extended his staff, "See ya!" and propelled himself into the air onto a nearby roof, leaping out of sight.

Marinette sighed, shaking her head until Nathaniel's face scrunched up in confusion, "How did he know my name?" Marinette's eyes widened in surprise.

"Huh…good question, maybe he heard it from one of our friends during the akuma attack?" she smiled and both teens started walking back toward their school.

"Phew…that was close," Marinette gripped her arm, "That would have been a lot worse without Tikki protecting me," she looked over her shoulder in the direction Chat disappeared to, "He didn't seem to notice anything, he probably didn't notice my injury as Ladybug either," she sighed in relief.

Adrien tapped his foot rapidly on the floor, looking annoyed as ever with his kwami, "Plagg! You ate not even ten minutes ago!" the youth rubbed at his forehead exasperatedly.

The black cat kwami swallowed down the apple-sized slice of camembert, looking unamused at his charge, "You know I'm always hungry after a battle," he sighed dreamily, savoring the delectable, smelly cheese in his mouth.

Adrien rolled his eyes, "Yeah, right." Adrien shuffled his feet, moving his weight from one foot to the next nervously, "Uh, Plagg…" the kwami lazily opened an eye in response, "Did you…feel anything weird when I saw Marinette and Nathaniel earlier?"

The black kwami seemed to think, yawning lazily as he floated in mid-air, "Nathaniel? Oh, you mean that red haired kid? He kinda looked like a tomato to me…" Adrien sent him a disapproving glare, "What? Did you see the shade of his hair?" the look intensified, "Fine, fine." The small cat rolled his eyes, "Anything weird? You mean your jealousy?"

A large, fanged smirk crossed Plagg's face and Adrien jumped, "Huh? Wha-what?! Jealousy? I wasn't jealous!"

Plagg turned his back to him, floating calmly with a smirk, "Whatever you say but jealousy killed the cat,"

Adrien huffed, "It's curiosity killed the cat and you know it," he crossed his arms, now turning around so he had his back to Plagg, "Of course I wasn't jealous, Marinette and Nathaniel are my friends,"

Plagg rose an eyebrow, "Friends? You barely talk to tomato child and Marinette has the worst case of stuttering recorded in history around you!"

Adrien faltered, scratching at the back of his neck, "Well…"

The cat kwami shrugged, "You asked me and I answered you. It didn't come from me though," he smirked.

Adrien frowned, thinking intently on the feeling he experienced as Chat. He didn't really know what compelled him to hog Marinette like that in front of Nathaniel, but whatever it was, Adrien was determined to not let it show again.

Whatever it was.

Thank you all for reading and please leave a review! :)