AN: pretty self explanatory. Got the idea from the pic at the top.

{10:30pm at night}

Marinette was tired. 'Was' being the key word. When she walked further into her apartment, she could here flopping in the bathroom.

Out of curiosity, she walked towards the dark room slowly. Out of fear, she grabbed her Nerf bat out of the corner in the living room.

As she approached the room, with caution, the flopping sound got louder. "Who's in their?" She asked, and the flopping seased and a little high pitched grumble could be heard.

When she turned on the light, her eyes caught those of the little intruder that was in her bathtub. Or what she would describe as, is a little catfish mermaid...thing?"

Her eyes suddenly flashed to pure awe as it blinked at her. "Aww, what are you little fella?" She asked, sitting at the edge of the tub, observing the critter at closer proximity. He tried to get up against the farthest wall away from her but ended up slipping; and he smacked his little head on the floor of the tub.

Out of her caring nature, she reached in and lifted the little critter back up so he was on his belly again, instead of his head. He looked at her for a second before shifting his gaze to the faucet, realizing she wasn't a threat to his existence.

With a warm smile, she noticed what he was looking at. Slowly as to not startle him, she reached for the shower head and took it down, turning on the cool water. It came out of the shower head like a rain; and made him purr in delight.

"You can purr too? Aren't you just the cats meow." She stated in amusement. He looked at her with a cheeky grin before taking a bow, his ears twitching lightly. As the tub began to fill, he started to grow. Going from the size of a baby bass, to just slightly bigger than Marinette, probably because of his gender.

Marientte watched in pure awe as he grew in seconds. He went from as cute as a button, to absolutely beautiful! He stared right at her as he was now bigger and not afraid of her in the least. "Adrien." He said, pointing to himself.

A light blush covers her cheeks before she states slowly, "Mar-IN-Ette." He smiles warmly and takes her hand, pressing his lips to the back of it gently. "Nice to meet you purr-incess."

Her blush intensified as he got closer to her. Staring intensely at her eyes. After a few seconds, she began to see stars, then... memories?" It was his past: the love of a beautiful mother, Plagg, a saltwater catfish was his best friend, the hurt he's experienced, the loss he's endured, the loneliness he felt for long periods of time in a coral reef, the coldness from his father, and being used by mermaids only for his wealth and family name.

He could see her memories too: the warmth of loving parents, a colorful, lively home, a dream to be a designer being fulfilled once graduating college, he also saw her pain, a love that lasted so long but meant almost nothing. The days, weeks and months she spent alone in depression over a one-sided love that never should have happened.

With one swift movement, they both engulfed the other in a warm and tight embrace. Once she let go, she leaned back, only to see that this merman, grew land legs. She looked right into his eyes, not looking anywhere else, as a crimson hue bloomed across her cheeks.

He chuckled nervously and ducked down into the warm water. "This water is the right temperature for me to become human; but I must ask, you wouldn't happen to have any fabrics to cover me would you?" He asked, this in pure innocence and Marinette couldn't help it as she stumbled over her own words.

"I- um...what? Oh! Yes! I may have something I can give you or I can throw something together...I am a designer after all." She stated this with a wink as she grabbed a towel from the utility clauset and threw it at him, him catching it with skill.

She left the bathroom so he could get out of the tub and wrap himself up, while she looked in her office for a male design she may have already finished for fun. 'Dabbling outside of work sure comes in handy' she thought with a giggle. She found a black t-shirt and some light blue jeans, shouting "ah-hah!" Folding them over her arm.

"Hey Adrien, I found you some-!" She stopped dead in her tracks as she almost ran right into him when turning to approach the bathroom. "S-Sorry!!!" She stated, jumping backwards rather quickly. 'why does he make me so flustered?!'

"Sorry, princess. I had no intention of scaring you." He stated, taking a step towards her with a warm smile. She handed him the clothes to which he took gratefully.

"Yeah- J-just put on some clothes!" She stated, shoving the clothes at him, averting her eyes from anywhere near him. He chuckles and walks inside Marinettes dressing room, closing the door after smiling at her. Marinette slumpes onto the bed with a huge blush covering her face, fanning it, failing miserably to cool it down.

After about fifteen minutes, he came out from the dressing room and had the outfit on. She did a once over on him and nodded lightly, while mumbling something to herself. "Does is not look good on me princess?"

She looked up at him in confusion, then realized she had been mumbling to herself again. "No! It's definitely not that! It could just use some light adjustments. Like: shorter legs, less broad shoulders, a white over shirt, etc." He smiled at her warmly and chuckled. "Your really passionate Mari. I like the way you veiw the world." He States sitting on her chase. After smiling at her, he averts his gaze through her balcony window; and gazes at the stars above.

"Do you have a dream, Adrien?"

He looks at her for a moment with a questioning look. Then he smiles at her fondly. "To fall in love, and be loved." He States with a light blush. Marinette's heart skips a beat as she gasps. "Have you never been in love?"

He looks down with a frown. "I have. But it wasn't meant to be. I want someone who loves me for: what I think, what I like, what I see, or just me. I don't want anyone to love me because of what I am." She looks confused. "A merman?" She asked. He looked over at her and shook his head, chuckling. "I'm a prince."

Her breath caught in her throat for a moment then she grinned. "Then shouldn't I be calling you purr-ince? Instead of you calling me princess?" She winked and grabbed the plate, taking it to the kitchen. She left Adrien a blushing mess in her office for a moment. "What the hell just happened?" He thought to himself, before she returned with another sandwich and a cup of hot chocolate. "Your not surprised in the least?" He asked as she smiled cheekily at him. "I'm surprised at how skinny you are, is there a food shortage where your at?" She asked, totally missing what he was asking. He chuckled and took a large drink of the hot chocolate in his pug mug. "I'm a prince." She looked at him and smiled. "And that makes you different why? Yes your a little more important, but your still...merfolk?" His eyes widen and he laughs brightly.

She stares at him for a second before his laughter becomes contagious and she finds herself giggling with him. Suddenly a question strikes her. "Hey, what makes you turn back into a merman?" He grins. "Salt water. If you want me to stay human, keep me away from it." She nods. "I'll keep that noted. But are you normally that small?"

He nods and smiles. "I'm only twenty years old. The largest mermen and mermaids are hundreds of years old. And they've never been human before. If they turn human they'd die almost instantly. The way we age is different from humans, but if we turn human we age like you."

She scoots closer to him. "Do you want to go back?" His eyes widen and he shakes his head, blushing at the closer proximity. "I left there, and I'm never going back. I don't belong in a world were I'm only loved-" "For what you are?" She asks with sadness in her eyes. "yeah."

She nods in understanding and he looks at her with saddened eyes. He slowly cups her face and kisses her forehead. "Your different princess, if it's no purr-oblem, I'd like to stay near you. Be a friend, as you humans call it." She grinned, forgetting about her sadness. "What do you call it?" He smiled sheepishly. "Blubber buddies."

With that, she looked baffled. Suddenly she giggled lightly. "Your so weird!" Her cheeks turned a bright pink, as she shook lightly. He looked surprised, happy, and lovingly at her. Taking in her rosey cheeks, long eye lashes, high cheek bones, and bright pink lips that lit up the room when stretched into a smile.

Honestly he was joking, but it made her happy; and that was something he'd like to see more of. He didn't ever want to see the saddened girl he saw in her memories.

How long had he been there? Thirty minutes? A couple hours? He looked at the time to see it was five in the morning. He'd been there for several hours. When he looked back at Marinette, he caught her yawning. "Let's go to bed M,lady." He States as he lifts her up bridal style, carrying her down the hall, to her room.

He gently places her on her bed and looks at her kindly. Surprisingly, she scoots over and Pat's the spot next to herself. "Until I can get you a bed, sleep next to me. I'm not making such a kind gentleman like you sleep on the floor or the lumpy couch.

"You think I'm a gentleman?" He asked as he got in next to her, keeping a respectful distance between them. "Well, no man has ever talked to me so sweetly, or been so open to me. Yes your a prince, but that doesn't begin to compare to how sweet you are."

She turned onto her back and grabbed his hand, giving it a tender squeeze. "Good night Chatton." He smiles at her nickname before humming. "Good night princess."

Her eyes widen and she smiles widely. "Oh, and before I forget to say this, you look like a catfish when your a small merman." Then she was quiet again. Adrien tried so hard to cover the blush that spread across his face as he fell to sleep. This girl is going to be the death of him. Good Lord what is she doing to him?

AN: honestly this took me longer to publish than to write😄😅. I hope you liked this anyway, It is my own look of what a mermaid Au would be like. Not sure if I'm continuing it, if not, '\(°3°)/' Tootles!!! ;3