BONUS CHAPTER (not canon to this story):

Suppose Ladybug hadn't outed either of them, but later got Tikki to pretty much confirm what she suspected: Adrien was Chat Noir. She understandably freaks out about this knowledge. Once she gets a handle on herself, she is able to talk to Adrien a little better and starts to respond to Chat Noir's flirting as Ladybug a little bit more as well, calling him 'My Kitty' and such. Things are going well for Adrien. His friend Marinette is finally opening up to him and his Lady is starting to respond to his flirtations. Then the day comes where there is an akuma (or akumas) too difficult for the two heroes to handle on their own and they need help. Ladybug has Chat Noir choose this time because she needs to go back home for her kwami's food. Chat goes to Fu's, picks a new miraculous, and heads to the person he trusts the most.

o0O0o

Marinette was more than a little frazzled today. She was running on two hours of sleep, was late to school (again), and to top it all off, not just one, but two fire-based akumas showed up. They were a mother and son duo, Match Box and Match Stick. It was then that she also realized that she had forgotten to pack some sweets for Tikki to fuel up on. Now she was stuck back at her house waiting for Tikki to finish eating while Chat Noir went out to recruit someone. The kwami in question had just finished the last bite of her cookie when a 'thump' came from Marinette's balcony.

"Hide, Tikki!" Marinette went to investigate the sound and Tikki flew into her chosen's purse. Lifting the latch on her window, Marinette called out, "Who's there?"

"Marinette, Is that you? It's Chat Noir."

Lifting the window all the way, Marinette crawled out onto her balcony and stood up. "Chat? What are you doing here?"

"I've come to ask for help."

Marinette's heartbeat picked up a little at what she thought Chat was implying. "From me?"

"From you."

"What, you want me to trip over the akuma while we're on a flight of stairs and send us all to the hospital?" she joked.

Chat smiled at her but shook his head and held up a miraculous box.

'Oh no,' Marinette thought. 'Why me?'

"Marinette Dupain-Cheng, this is the miraculous of the Dragon. It grants you the power of Typhoon. You will use it for the greater good. Once the job is done, you will return the miraculous to me. Can-" he was cut off before he could finish.

"You know? Why the heck not?" Marinette threw her hands up in the air and let them fall limply to her sides, her head flopped back to stare blankly at the sky.

Chat blinked, "Huh?"

"Chaaaaat, why didn't you choose someone else?"

"The only other person I would trust with this miraculous is Ladybug, but she already has one. Besides, Marinette, you can be a little shy, but that shyness hides something fierce and strong within you. You would make a wonderful superhero."

He was unintentionally throwing her own words back at her face and was being sincere about it. It was a strange feeling. She corrected her posture and gave him a look, "I must say, My Kitty, I'm glad that I'm the only one you'd trust both in and out of costume with this miraculous."

Chat Noir's jaw dropped. He blinked once. Twice. Thrice. Before, "Mi'Lady?"

"It's me, Adrien."

The boy sputtered, "You-you know who I am?!"

"I do. You kinda gave yourself away when you were Mus, but I didn't mention it. Our identities were supposed to be secret, but seeing as how history is repeating itself, I figured that it was best to just get all this stuff out in the open."

"I... but, you..." Chat sat down and rested his chin in his hands and stared at the floor. "I... I need to process this."

Marinette smiled, "Tikki, is there a way that I can transform with two miraculous jewels?" Cautiously, Tikki floated up from her hiding spot and gave Marinette and Chat a dubious look.

"Yeees," she said slowly. "Transforming with that much magic though... it's bound to be difficult for you to wield, Marinette. When you transform into Ladybug, you get a rush of power and magical energy. Imagine that rush times two!"

Marinette looked concerned at the new information while Chat was still just sitting there, still trying to process what he had just learned. He was starting to smile, so she guessed that he was working through it. "Do you think I can handle it, Tikki?"

"I think you can, Marinette, but please just be careful. It's a lot. You'll probably be exhausted afterwards."

"Hmm. Chat, can I see the box?" Wordlessly, he handed it over. She gently lifted the lid and a bright flash faded into a little kwami that looked like a mini dragon. "Hello, there, little cutie. What's your name?"

The kwami eyed Tikki, and she nodded. "I am called Longg. Are you the holder of the Ladybug miraculous?"

"I am. My name is Marinette. It's nice to meet you."

"It's pleasant to meet you as well. What is the purpose of my awakening if you already have a miraculous?"

Chat piped up at this point, starting to stand up, though still looking a little shocked, "We need help with an akuma. Ladybug told me to go recruit a new hero and I did, but I didn't realize that the person I wanted to recruit was Ladybug's civilian self."

Longg nodded thoughtfully. "I understand. How may I serve you heroes?"

"I want to try to transform with you and Tikki together. Would you be willing to do that?"

"I would be honored to transform you with Tikki, Marinette. Tikki told you of the dangers?"

"She said that it's a lot of magic and that I'll probably be tired afterwards."

"Not probably. You will be tired." Longg paused before adding, "With the added magic at your disposal, your reflexes and power output will be heavily increased. You may have trouble controlling your strength."

"Hmm. What do you think, Chat?"

At his name, Chat's ears perked up. He thought for a second before he answered shyly with a little smile, "... Marinette, you're the strongest person I know. If anyone can successfully transform with two kwamis and control their power, it'll be you." she flushed a little at his complement and bit her lip to try and keep herself from smiling. It didn't work.

"Alright," she started, and everyone on the balcony gave her their attention. "Let's do this, you guys." She stood there with a determined look before she frowned. "Tikki, how do I transform with two of you?"

"All you have to do is call out our transformation words one after the other."

"Really? That's it?"

"That's it."

"Longg, what is your code phrase?"

"To transform, say 'Longg, let's dive' and to use your special power, say 'typhoon' and you will be able to command water."

"Like a water bender?"

"What's a water bender?"

"Er- I'll explain it to you later when we have more time, alright?"

"Alright."

"Tikki, spots on!" Marinette transformed into Ladybug and Chat's face broke out into a huge grin. Ladybug then called out, "Longg, let's dive!" The added rush of power and magic made Ladybug feel a little dizzy at first, and she stumbled a bit. Chat Noir was quick to steady her. She gave him a shy smile, "How do I look?"

Chat looked her up and down. "You look beautiful, Mi'Lady." They gazed at each other before Chat added; "You also look like you could break a person in half like a toothpick." Ladybug indeed looked powerful- she still had her black spots, but the center part of her suit – from her neck all the way down to the insides of her legs - looked like a dragon's underbelly. Her hands were tipped with short talons. Her hair was French-braided and went all the way down to her back. Two curved, red-tipped horns poked out of the side of her head.

"You give the sweetest compliments, Chat. You're making your Lady blush." She scritched his chin gently and he purred in happiness. "Are you ready, my Kitty?"

He blinked and smiled at her, "Always." They leapt off Marinette's balcony and went on to hunt down the akumas.

Long story short, Chat Noir and the powerful new heroine, Scarlet Dragon, defeated the victims and saved the day.

A/N: OK, I AM DONE. This story wasn't supposed to be any longer than about 3,000 words. NOW LOOK AT IT. SOMEBODY STOP ME I'm drowning in the adorable side adventures these two could have. Mus!Adrien with Ladybug and Scarlet Dragon!Marinette with Chat Noir (even just Dragon!Marinette with Chat is enough)

The research I did for the dragon miraculous points towards the powers being related to either water or 'power' in Chinese culture. I went with water because it's easier to explain. Longg, the dragon kwami originates from China, (according to the wiki) so I'm just rolling with this. Thank goodness this is just fanfiction, right?