There isn't much background info to this; Marinette and Chat Noir are secretly dating, no one but them knows, Marinette doesn't know Chat is Adrien, and takes place sometime mid-season 5 (after 'Elation' if they had gotten together).

I had this idea before and I really wanted to use it for my smut chapter for Marichat May this year, and this was the only prompt I could pair it with, but I think it works well enough.

Marichat May 2024

Day #18: Secret Relationship

As a super hero, Chat Noir's life was filled with secrets. His secret identity as Paris heart-throb Adrien Agreste was his biggest one. His second biggest; his ever-growing love for Marinette Dupain-Cheng.

Why was one bigger than the other? Because at least Marinette knew how much he loved her, while no one knew who he was behind the mask. Not even Marinette.

Everyone in Paris was obsessed with him; as a superhero and as a model. Screaming when they saw him, begging for autographs and selfies. And while he appreciated the admiration and support, they weren't in love with the real him. But Marinette was.

Even if his bluenette princess didn't know who he was behind the mask, she still saw him the way he has never been seen before by anyone.

But as much as he'd love to reveal himself fully to her, it was dangerous to, with Monarch still at large. So until he was defeated, they had agreed for him to keep his identity a secret.

And the same went for their relationship. So no one, especially Monarch, could use her against him, they couldn't be a couple in public. Chat would never forgive himself if something happened to her because of him. Not in a million years.

Thus, the two developed a system of Chat visiting her and they had private dates in her room, or he'd whisk her away to another private location in the city to eat, talk, enjoy the sights, and/or enjoy each other's bodies.

While seeing each other, the two had experienced many sexual exploits together that made their secret relationship rather exciting.

Chat Noir made his way across the Parisian rooftops. His day had been frustrating and glum. And the only thing he knew that would for sure cheer him up would be to hold him princess in his arms, hear her sweet voice, see her kind smile, and kiss her soft lips.

It was late, but not too late that he thought she would be asleep. Finally, he reached the bakery. Chat landed quietly on the roof, careful to not alarm her parents. When they had dates in her room, they always had to be quiet. No one could know of their relationship, not even her kind and protective parents.

Chat climbed down from the building's chimney to her balcony. He glanced down through her skylight but didn't see her. It was dark but his night vision allowed him to see everything clearly. She was definitely not on her bed.

Curiously as to what she was doing, Chat decided to climb down the side of the building to one of her windows.

When he made it to the window and looked inside, he noticed the light of a single lamp was on in her room. The second thing to catch his eye was Marinette herself. She was laying on her chaise, wearing her pajamas. Sort of.

Her pajama shirt was on, but it was lifted up over her breasts. Her hand was caressing one while her other hand was between her legs, which were bare. No pajama pants and no panties.

Chat's eyes grew big and round. Then it was just his pupils that were big. He couldn't look away. When her legs parted open a bit more, he could see the fine hairs of her core. But it wasn't her fingers that were teasing her clit. There was something sticking out of her. Something pink.

Since when did she have any toys for pleasuring herself? The feline hero had no idea his princess was so naughty. Was this dildo her only one? Did this one vibrate? How big was it? How long had she been using it?

Did she use it the nights she was horny and he could not come over and pleasure her himself? Most likely.

Chat was jealous of that pink piece of silicon for a brief moment. But the image of his princess laid out for him to peep on was so glorious, he quickly decided that he was glad for it.

Her bluenette hair was flowing free—which he always loved—and her eyes were closed but her mouth was open, likely singing beautiful moans and gasps while whispering his name. Unfortunately, he couldn't hear any of them.

As breathtaking as the sight was, the tightness of Chat's suit was becoming too much to bear. Watching wasn't enough. He needed to get in there and give her what she really wanted.

Chat yanked himself away from the window and climbed back up to the balcony where he quickly opened the skylight and leapt in, landing on her bed.

"Chat…nyah. Oh Chat, mmmm."

The sound of Marinette's sweet voice hit Chat's ears before his entire body was inside her room.

He had been correct. She was moaning his name.

"Oh Chat, you feel so good."

Staying low on the bed, Chat glanced over her railing to her chaise where she was still going, completely unaware of his presence.

"Oh! Oh God! Yes! Yes, kitty! Good kitty!" she hollered, rocking her hips.

Chat bit his lip and gripping the bar of the railing tight. Not only was the sound of her pleasure available to him while in there, but so was her smell. His sense of smell was very powerful while transformed. The smell of her arousal filled his nose and hazed over his mind like a thick fog.

He needed to get closer.

Still quiet as a nocturnal predator, Chat leapt from her loft bed to her room's main floor. She still hadn't noticed his presence. Unsure whether to announce himself yet or not, he decided to see how long it would take for her to notice. So he stepped closer until he was standing at the foot of her chaise.

Now closer, his sensitive ears also picked up a faint buzzing coming from her core. That thing did indeed vibrate.

As he stood there and enjoyed the sight, Chat grasped his bell and pulled it down, unzipping his suit. Down it went, further and further until he made it to his crotch. Finally, his rock-hard cock was free from his constricting suit. He grasped it in his hand and began to stroke himself as he watched her.

"Fuck! Chat! Fuck me more!"

After about of minute of jerking himself off to the sight of his princess, he saw her eyes begin to flutter open. They were glossy and unfocused at first, but when they finally recognized his figure standing at her feet, they widened in shock.

"Chat!?" she cried out while Chat just smiled bigger. "Wh-what are you doing…how-how long have you been standing there?" she stuttered, a bit embarrassed but made no move to cover herself up at all. And her toy stayed where it was.

"Long enough for you to get me hard, princess," he moaned, still stroking himself. Marinette's eyes fell to the motion and she bit her lip. He was so big. "You looked like you were having fun and I didn't want to interrupt." Chat's eyes went back to between her legs where he could still see the butt-end of the dildo. "You like that pink toy?"

Marinette blushed and looked off to the side. She knows she never even told her feline boyfriend that she had bought something to pleasure herself when he wasn't around. "Well…it's good but…it's nowhere close to the real thing," she said, her voice becoming more wanton before her eyes glanced back to his hand grasping his erection. "I thought you couldn't come over tonight and…I was so…" she trailing off as a gasp escaped her mouth. Her toy was still vibrating inside her after all. "I-I needed some relief."

Chat smirked deeper. "You were so what?" he asked. "Don't be shy. I want to hear you say it."

Marinette hesitated for a second but said it anyway. "I was…so horny," she said. Her eyes glazed over again as they darted up and down his body; from his plump lips to his hard cock. "I-I wanted you so bad."

"Well here I am."

"Here you are."

Marinette pushed herself up into a sitting position and scooted herself to the foot of her chaise, her legs over the edge, mindful of the dildo still wedged in her vagina.

Chat leaned down, caressing the sides of her head, and pulled her in to kiss her deeply. Immediately, their lips opened up, moving in starving sync with each other.

When they needed a few seconds to breath, Chat pulled back slightly to speak. "I'm guessing from how loud you were being that you're parents aren't home?" he asked against her lips.

"No. But they'll be back in a few hours," Marinette confirmed.

Chat grinned. Which meant they could be as loud as they pleased. "Good," he whispered before grasping her bunched up pajama shirt and pulled it off her completely. Before it landed carelessly on the floor, his lips were back on hers.

As they continued to devour one another, Marinette's hand reached out until it found Chat's free erection. She felt Chat grunt into their kiss as she gently grasped it and began to rub the head with her thumb, smearing his pre-cum all around.

Chat pulled back just enough to ask "You wanna suck my cock?"

"Yes. Yes, please," Marinette whispered back.

Obliging to her wishes, Chat stood tall in front of her, allowing his cock to stick out right in front of his princess's face. Marinette's hand grasped the base while she leaned her head in, kissing the tip and then licking up and down the sides.

A growl of pleasure rumbled in Chat's throat. Her touch was always so amazing. Even the lighter ones.

After licking around his entire cock, with it well lubricated, Marinette started to stroke her hand mainly at the base-half. Meanwhile, the top-half she took into her mouth.

Chat threw his head back, biting his lower lip as she bobbed her head. One of his hands lightly gripped her head, gently matching her rhythm in movement. He was mindful of his claws as he stroked her free bluenette locks.

"Oh, yeah. Oh, that's so good, Marinette," he moaned.

Marinette released him with a wet pop. "You like that, kitty?" she asked, looking up at him while continuing to stroke him.

Chat looked down at her. "Yes. You're mouth is amazing."

"So it yours," she replied. His tongue was sharp in more ways than one.

Chat smirked. "Then how about we remove that toy and you let me taste you too?"

Marinette bit her lip at the idea. She wanted that very badly. "Okay. But first, I want you to come," she said before sucking his cock back passed her lips.

As Marinette thrusted as much of his cock as she could into her mouth, then back out a bit, then back in, she reached her other hand down to her core where her pink toy still was.

With enough of the butt-end sticking out, she could grip it and move it around. The vibrations felt incredible and made her brain mush. Then added with the intoxicating sensation of Chat's dick filling her mouth at the same time left her so lust-drunk she could barely think. And she couldn't get enough.

"Oh God!" Chat cried as she went faster. "Mari-gah! I-I'm so close!"

Marinette pulled her mouth away just to quickly say "Come for me, kitty," before continuing. She wanted to taste his ejaculation on her tongue. She couldn't slow down now.

Her hand stead up with her mouth; thrusting, stroking, and even twisting around until finally, a good stream of semen shot into her anxious mouth. Marinette thrusted his cock in as deep as she dared, allowing the load to slip right down her throat.

Unfortunately, she couldn't keep it there for long. Seconds later, she pulled herself back, removing his cock completely while she coughed a bit. It wasn't the first time she'd tried to take him that deep but it was still difficult.

"You okay, princess?" Chat asked with sweet concern.

"I'm…I'm fine," she said, still sort of catching her breath. When she felt better, he looked back up at him and smiled like a Cheshire. "That was so hot," she cooed. Getting to suck him off with her special toy stimulating her core. Damn.

"Yeah it was," Chat agreed then returned the Cheshire grin. "Now it's your turn."

Chat lifted Marinette up and laid her down on the rug in the middle of her floor. With her on her back, he hovered over her before leaning down to kiss her deeply once again. Marinette carded her fingers into his soft blonde locks, pulling his head down closer to her. Marinette opened her mouth, allowing Chat's tongue in. Tasting his own cum in her mouth turned him on more. Even after one orgasm, he was still fairly hard. It wouldn't take much to get him fully hard again.

Releasing her mouth, Chat's lips trailed wet kisses down her neck. He stopped briefly to suck hard, leaving his mark on her—he knew she wanted him to and insisted she could cover them with make-up. Satisfied with his handy work, Chat resumed trailing his lips and tongue further down her naked body.

Again, he stopped, at her breasts. Taking a minute to pinch, suck, and fondle her nipples. All the while enjoying the sweet sounds gasping from Marinette's mouth.

Continuing down, he landed more kisses on her flat belly, then further down until he finally reached her core. Her toy was still there, still vibrating.

Sharing a quick look of acknowledgement with his princess, Chat slowly pulled it out. The pink silicon buzzed in his hand, covered in her juices. After turning it off, he set it aside on the wooden floor, off the edge of the carpet.

Because of his claws while he was transformed, it wasn't safe to use his fingers to play with her clit. But that was okay. He still had a mouth to do all the work.

Without wasting anymore time, Chat laid down on his front, positioning his head in between her spread legs, and finally, stuck his tongue out to taste her pussy.

Marinette arched her back off the floor, craning her neck, and curling her toes.

"Chat…NAAGH!" she cried, feeling his tongue work itself deeper into her core. "Yes! It feels so good!" As she had said, his mouth was amazing too.

"Mmmmm," Chat hummed into her pussy. She was already so wet. It tasted so sweet, he couldn't get enough. Chat pulled his mouth back barely an inch. "Every cat has his favorite cream," he whispered before going right back in.

He devoured her pussy like a starving animal after finally hunting a long-awaited prey.

"Fuck! Chat Noir! Fu-!" Marinette cried louder. Her fingers went back into his hair, shoving his face further into her. "Nagh! Chat!" was all the warning she gave before her orgasm hit her like a ton of bricks. Her core burst with more of her love juices, which Chat lapped up eagerly, sticking his face as far into her pussy as physically possible.

Chat sat up on his knees, gazing down as his naked princess as her chest rose and fell with heavy breaths. She looked up at him with lidded eyes. Then he looked back down at her overflowing core.

He couldn't image a more stunning sight.

"Marinette…" he uttered, his voice wanton and heavy. "I want to fuck you so badly. I need to or I'll go mad."

Marinette grinned. "I think I'm already mad. My mind is completely gone. All I have left is the desire for you to take me however you please," she joked, gladly embracing that she couldn't think straight about anything except her strong chaton ravaging her.

Chat grinned. "However I please?" he repeated. So she was letting him pick the position. Chat glanced up from her and caught his partial reflection in her full body mirror by the head of her chaise. That could be a wonderful experiment. "Then how about you get on your hands and knees for me," he told her. Marinette sluggishly obeyed, turning over onto her front then lifting herself up. "Wait. Face your mirror," he added. Her head was facing more toward her desk.

"My mirror?" she asked, looking over her shoulder at him then over at said mirror.

"Yeah," Chat said, looking into the mirror with her while gently caressing her ass. "I want to be able to see you and for you to see me," he said tenderly. Marinette was a bit skeptical but intrigued as well. So she adjusted the angle of her body until she was facing the mirror front and center. Chat grabbed two pillows from off her chaise and put one under her belly and the other under her head. Then he moved over until he was behind her again. Taking his hard cock in his hand, Chat swiped the tip against her folds a few times, making Marinette squeak and close her eyes. When Chat saw her not looking, Chat glided his other hand from her ass up along her back. "Don't look away. I want you to watch as I fuck you," he said with a sweet, mild growl.

"Then fuck me already!" she begged.

Chat grunted, loving to hear her enthusiasm. Lining himself up again, Chat gripped her hips and thrusted forward, filling her pussy. Marinette moaned loudly as he stayed still, letting them both adjust for a minute.

"Oh princess," Chat groaned, simply enjoying his cock being encased by his princess's warm, wet walls. "I've always loved this position but I hated that I couldn't see your face at the same time." He stared at her equally blissful face in the mirror for a bit longer before slowly started to move his hips. "I feel…so silly…for not thinking of this…sooner," he uttered slowly between some deep breaths and steady thrusts.

"I didn't think of it either…who cares," Marinette replied, fighting to keep her eyes locked on their reflection. It was too hot to look away. She wasn't much interested in her own reflection, but focusing on her feline boyfriend behind her was a lot more interesting to watch. "I like seeing your face from this position too, kitty," she moaned hotly. Chat picked up his pace. Marinette joined him, thrusting her hips back to drive him deeper. "Agh, fuck! Fuck me, kitty! Just like that!" she shouted.

They were both used to closing their eyes when they pleasured each other. It helped them focus on the feeling of one another's touch. But for this, they couldn't. Or more like they wouldn't.

Neither wanted to even blink and miss a second of the show in the mirror starring them.

"Look at us, princess! Aren't we beautiful?" Chat hollered, practically laughing like a mad man. The way her free bluenette locks came down to frame her lustful face was truly a sight to behold.

"Yes! Oh God, Chat!" Marinette shouted. Chat's emerald feline eyes practically sparked with desire. And watching his muscles move—covered in skin-tight black—was making her eyes want to pop out of her head.

They were a beautiful couple. Even if no one else got to see that they were. Not to see them having sex, just seeing them together.

"Fuck! Aghh, fuck Marinette!"

Chat's hands gripped her ass cheeks, squeezing them lovingly while still minding his claws. While he wanted to keep his eyes on Marinette's face in the mirror, he glanced down at her body at least a few times. He always loved admiring her bare back and, of course, watching his cock going in and out of her pussy while her ass moved with him.

Beautiful indeed.

"Kitty, it's so good…you're gonna make me come again," Marinette uttered a bit breathless. The sensations on top of the sights to stimulate her were building up. She was close to a second orgasm.

"Then come, princess," Chat grunted. "I'll be right behind you," he chuckled.

Marinette attempted to roll her eyes. "Don't make puns while we're—nagh!—while you're…" she couldn't finish her sentence. She was gonna come.

"Fucking you like a wild animal in heat?" Chat groaned, going a bit faster. If they were both close, he wanted them to come together if possible. He wanted desperately to see the look on her face when he came inside her.

"Y-Yes," Marinette agreed. Whether he meant he was the wild animal in heat or she was, she didn't care. She was too lust-drunk to care about anything anymore. "Yes! Oh God yes!" she cried as she came for the second time that night.

"Marinette…Marinette!...Ahhh!" Chat came as well, harder than earlier, spilling his load inside her tingling core. She'd been on birth control since they started dating so they were safe.

Marinette collapsed onto the pillows beneath her, sweaty and out of breath. Chat slowly pulled out of her and laid down on his back beside her on the floor, spent as well.

Marinette turned her head and stared at him. Chat turned his head and stared back at her. They both grinned at each other.

When she got her breath back, Marinette lifted herself up with her arms just enough to move over, hover her face over Chat's and kiss him tenderly.

Chat purred into the kiss while caressing the back of her head.

He loved his princess and she loved her kitty.

Their relationship might be strictly hush-hush, but it was still real. And beautiful to them.

Even if it was a secret. It was their secret.

See u all again in Ladrien June =^.^=