Coccinelle and Huli Jing are from @imthepunchlord’s Lucky Fox Paradox fanfic. (Coccinelle’s design is by @zoeoneesama) 

Purrge and Outfox are from @generalluxun’s Chloe Goes Back In Time AU (CGBIT) 

Fennette is from @lunian’s Ladybird AU. 

Miraculous Across Worlds AU (MAW) is by @nionom-art (Can be found here and here.)

Extras Below!!!

Chloé - 172 cm/5'8"

Adrien - 181 cm/5'11"

Mari - 163 cm/5'4"

Sabrina - 168cm/5'6"

“Please, tell me this won’t force me to have sex.”

“Of course not,” Trixx laughter. “It’s going to make you want to, maybe even feel like you need to, but only from your mate.”

“Can we just- just say . . . special friend?”

“You’re old enough to have a mate, Marinette, aren’t you?”

“I- yes- but- I only once with-“

“I know that.”

“Trixx!” Marinette screeched. Forget infrared. She was going to start broadcasting to radios, start vibrating straight through the plane of existence.

“Marinette, are you all right?” Her mother called from the apartment below.

“I’m watching my K-Dramas!” Marinette answered. She clapped her hands over her mouth as Trixx started to cackle. She’d had Kim over a couple of months ago, when Chloe had beaten him down particularly badly over the course of a week. He’d shown her some of his favorite TV-shows, mostly Vietnamese and Korean dramas. Marinette liked them, and he came over the next day. They were on the couch, and then she was in his lap, and they were talking about unrequited love and then she was inviting him upstairs.

They’d laid in her bed, and while she was still panting and glowing, Kim had muttered under his breath. “We still like different people, don’t we?”

And that had been the end of that.

Her answer appeased her mother regardless, given that she didn’t bother to shout again. Marinette cut her eyes at Trixx, who was still laughing. “So, when is it going to start?”

“It’s spring,” said the kwami. “You and your . . . special friend should go into heat at the same time, so you’ll probably feel it for the first time whenever you see them next.”

A tapping at the trapdoor above them interrupted. Marinette gaped at it. Three fast raps, a pause, then two paced much slower. Chat.

“If Chat is my- if he’s . . .”

“Open it, and you’ll know.”

***

There was a lot on Chat’s mind. Plagg had decided to go into unwanted detail on some apparent side effects of the Miraculous now that he was older. He wouldn’t tell him anything useful though, and Chat couldn’t quite think because his skin itched strangely. No, it wasn’t itchy, but it was uncomfortable. And distracting.

It still didn’t stop a sole, horrifying thought from circling his mind.

What if his mate was Ladybug?

She was gone, no trace, no sign. For all he knew, she was halfway across the world. If he had to spend two months needing sex from a person not in his life, he didn’t know he’d do. What was he supposed to do? Plagg only laughed. Suggested other female Miraculous wielders. He’d never go to Ladybird. His heart, despite his mind’s best efforts, despised that she’d inherited Ladybug’s mantle of responsibility.

Even after her father had been akumatized and all the mess of emotional rollercoasters that came in the aftermath, Chat was a somewhat frequent visitor to Marinette Dupain-Cheng’s attic. Because they were friends. Just friends. Friends who wanted to date each other, but couldn’t. Friends.

There was a long pause after Chat knocked. It made his bones crawl anxiously. What if she didn’t want him? What if she sent him home?

What if she noticed that his mind was whittling down into nothing while he thought about the most lewd things he’d ever imagined? What if he couldn’t stop and she wanted him to but he was too far gone-

“I’m not here to fuck Marinette,” Chat pinched himself. He thought about what she might be wearing—the sun had fallen while Plagg detailed old requests for modifications to the suit that Chat was certain were made up. Marinette would be in pyjamas. Not that he’d never seem her in them before, but-

The trap door opened three pinches later.

Her bluebell eyes met his, expectant. Beautiful: his Marinette was beautiful. Her hair down, brushing over shoulders bare save the straps of her tank top. Her room smelled good because she did and this was a bad idea or a very, very good one because holy hell she smelled good and not a normal good but the sort of good that made his brain not think.

“Chat?” Marinette said lightly. Like it was a secret.

He was so, so screwed.

“Hi,” he said nervously. “I saw the light on. Why are you up so late on a school night?”

Marinette’s eyes narrowed. “Chat, it’s Saturday and barely 22:00.”

Chat flushed. “Yeah.” Marinette gestured for him to enter. He shook his head. “I should, uh . . . Go.”

“Why?” Marinette asked.

Chat couldn’t think of a lie. He didn’t need her help with a lie. He needed her help handling the truth. “My Miraculous is making me go into heat and I really need to go take care of that because you’re really amazing and I don’t want to ruin that with an overactive cat dick.”

Marinette frowned, looking concerned more than alarmed or frightened or even disgusted, which he hadn’t exactly expected. “If it affects Miraculous wielders, shouldn’t you try to talk to Fennette or Ladybird?”

“But what if my heat partner was supposed to be Ladybug?” Chat demanded. Marinette’s eyes were open and thoughtful. She held his gaze without hesitation.

“Then you’ll find her.”

As if it were that simple. He supposed it might be. If the strange tug he felt toward Marinette was anything to judge by, perhaps he could simply find her. Just go out and let his body bring him to her.

He found his face centimeters from Marinette’s, whose breath hitched. Her lips were shiny, like she’d put gloss on recently. She had such pretty lips.

“Chat,” Marinette whispered. He hummed, gaze solely on those lips. Her mouth would be warm, soft. His mind idly turned vulgar. What noises would she make around his cock?

“You’re as good as Ladybug,” he said. She bit her lip. Oh, he wanted to bite that lip too. And her neck, so any and all could see that she was claimed, she was his. “Better than Ladybug.”

“Chat, don’t give me hope,” Marinette pleaded.

Chat shuddered violently, closing his eyes and turning away. His mind cleared like he’d jumped in a frozen lake.

Marinette was a civilian. She was his friend. She was off limits. Off limits, so far off limits that he felt guilty for coming to hang out some nights. He didn’t want to string her along. And here he was, thinking about ruining everything and endangering her.

“I have to go,” Chat cleared his throat, backing away from the trap door.

“That’s- Yeah,” Marinette sighed. She pushed a hand through her hair, smiling despite the pain in her eyes. Chat winced.

“I’m- I’m sorry,” Chat said softly. “I shouldn’t have come here.” Marinette nodded dully, still inside. Even as he moved toward the edge of the roof, she did not try to get up. Chat cursed himself soundly.

“Home or patrol?” Marinette asked before he could jump the railing. He glanced back at her. She looked . . . She looked like he’d need to apologize again.

Chat forced himself to shrug, to smirk. “I don’t know. I’ll probably wander around, try and see if there’s any sign of her, now that I have an extra horny sense.”

Marinette laughed easily. His heart sung, and his body threatened to go back to her. He forced himself to salute her and jump into the night, to move away from her until the tug was gone.

It lingered for far too long. He was halfway home and debating running all the way across Paris before the desire to rush back faded even a little. He muttered reminders to himself with every building he crossed.

“Marinette is a friend . . . Can’t sleep with Marinette . . . Find Ladybug . . . Don’t wanna hurt Marinette . . .”

His baton flashed. A message from Fennette. Usual spot. ASAP!!!

Chat frowned. U good?

No. Need 2 talk.

“That can’t be good,” Chat murmured, heading back the other way.

He didn’t notice the tugging had changed direction.

•••

There was an abandoned warehouse about equidistant from Marinette’s house, Alya’s apartment, and Chat’s place. Not that Fennette knew where he lived, but if they all left at the same time, they all arrived at the warehouse within a minute of each other.

Fennette had to take the long way, given that Chat was near her house when she’d transformed. He paced on the roof, grumbling and pinching himself.

As soon as she landed, it hit her like a truck.

It’d been bad enough as Marinette. She’d opened the trap door and wanted to yank him inside.

This was different.

This was wild.

This was animalistic in the most aggressive way imaginable.

He turned slowly, green eyes fixed on her. She didn’t move, staring back. She couldn’t breathe. He smelled like a god.

“Chaton,” she managed a smile. He stepped forward, she stepped back. His eyes lit with the challenge, trying to circle her. She pivoted with him, like fighters waiting to strike.

“Fennette,” Chat answered. “You called?”

“Texted.” His eyes flashed at the correction. She narrowed her eyes. She trusted Chat more than anyone in the world, but this was different. He was off, on edge, in a way that made her blood warm and her teeth grind. “It was an emergency.”

“Was it really?” Chat pushed closer. His cat ears twitched, and she noted his nostrils flare as he took a deep breath. His pupils expanded like he was high. Fennette stood her ground.

“I got a call from a friend, said you’d visited,” Fennette said smoothly. Chat blinked, his posture stiffening slightly. Shame flashed across his face, but the wind picked up, stirring the air again. Fennette tried to breathe through her mouth. “I promised to take care of you.”

“Oh?” His voice dropped. Her body thrummed at the sound. “How so?”

“If you touch a civilian, no matter which one, I’ll neuter you like a house cat,” Fennette snapped her teeth, breaking hold of the odd desire to roll over for him. She was a superhero in her own right, and even if he had the more powerful Miraculous, she was not his toy to play with. Chat snarled, spiraling nearer. “This is a Miraculous problem. You go to Miraculous holders. Understand?”

“The newbie thinks she can give orders, huh?” Chat tilted his head. He smirked as Fennette squared her jaw. “You like to be in control, don’t you, little fox?” A clawed finger hooked under her chin, though she didn’t know when he’d come so close. “Are you really going to take care of me?” His breath was warm as he leaned into her. His body pressed against hers, warm and hard. “Because I’m going to make you cum so hard you forget your real name.”

Fennette’s legs trembled at that voice. He had no right to sound like sex itself. She tore her chin out of his grip, her tongue darting out to wet her lips. Chat watched the flick greedily.

His hand dropped to stop her knee just before it could slam into his nether regions. He growled, really, truly growled. Fennette smirked.

She’d sparred with Chat Noir and Ladybird before, as a way to keep in shape when Hawkmoth went dark for a little bit. Usually, she could hold her own, something initially surprising to Ladybird and a source of endless questions from Chat. Fennette kept her air of mystery, even when Alya asked Marinette if, when, and how she worked out.

This fight with Chat Noir was just that—a fight. She bit. He scratched. They tumbled across the roof like scrapping nine-year-olds. He pulled her hair. She sunk her teeth into his ear.

By the time Fennette straddled him, hands pinning his to the sheet metal roof, legs pressed against his so he couldn’t twist her off (again), both panted so hard they couldn’t even manage witty banter. Chat lifted his head once before sighing and letting it fall back. Fennette could hardly find the energy to smile victoriously. His cheeks had flushed around his mask, and he squirmed under her.

Fennette dropped closer to him, straining still, not letting herself be lulled into a trap. “Yield.”

He twisted his wrists until he could slot his fingers between hers, entwining their hands. “I’m at your mercy, little fox.” He pulled on her hands, spreading them farther apart. She slipped lower, hair falling around them. He smiled. His hips shifted below hers.

“You’re not supposed to enjoy this,” Fennette breathed, dropping her forehead against his. “I won.”

“Maybe I like a strong woman, Fen,” he shifted his hips again. Fennette dragged her nose along his, eyes fluttering shut.

“If you let me win, I’ll kick your ass again,” Fennette murmured. She felt his laugh in his breath on her skin.

“If I let you win, there is no ‘again.’”

She didn’t know who kissed whom. She doubted he did either. One moment he was smiling and she scowling; the next he was eating her gasp. His hands, still grasping hers, tugged her farther down, and he bit her lip, holding and tugging as she tried to pull away. Fennette tasted blood.

“Oh, you bastard!”

His hips bucked up into hers and she gave a similar treatment to his already tender ear. “How do I get you out of this damned suit?”

Fennette tightened her grip on his hands before he could start searching. “Maybe you don’t get to.”

Their lips collided again. Chat licked at the mark on her lip, sucking it back into his mouth. He moved then, when Fennette was consumed with concern that her lip would be bitten again. She got wise to it too late.

He flipped them, gathering both her wrists in one hand, using his size against her. “Do you want me to stop, or do you want me to help you feel good?” Fennette struggled briefly. He didn’t loosen his grip. “Use your words.”

She snapped at his nose, missing but only barely. “Don’t you dare treat me like a child.”

“That doesn’t answer my question, Fen,” Chat breathed into her ear. Sandy blond hair drifted across her cheek. “Do you want to stop?”

Her pride warred with her need, stubbornness against desire. Damn this heat bullshit. She couldn’t clear her head, not with him so close to her, his lips drifting down along her jawline.

“What do you want, Fen?”

“I want to ride you,” Fennette finally admitted. She hadn’t done it for more than thirty seconds with Kim. But Chat, this idiot who couldn’t recognize her, she wanted to have squirming beneath her. She wanted that small bit of revenge, the little spiteful amount of control.

Chat purred above her, “That sounds like an excuse to be back on top, Fen.”

“Chaton,” Fennette tried to pry her hands loose to no avail. His free hand stroked her cheek softly. His mouth fell over her nose, then her chin, before blessing her lips with his softest kiss yet. “Please?”

“I want to take you from behind,” Chat whispered. Fennette shuddered under his gaze. He looked as though he might devour her, but his face split into a soft grin that made her heart sing. “But, ladies first, I suppose.”

Their clothes gained zippers and buttons and ties where before there had been none. Layers of the most sturdy material Fennette had ever known peeled back with the ease of silk.

There were hands, and fingers, and kisses, and then he flipped them again. He felt heavenly, divine, as she slowly sunk down on him. He made the most delicious noise, something between a growl and a purr, his hands flying to her waist, then up toward her breasts. A moan pressed out of her as she lifted and dropped herself carefully. Chat grunted.

She didn’t have time to think about this—him—even as she rode them both to completion. Only when she was lying on his chest did she consider it.

He’d wanted Marinette, come straight for her as soon as their heat set in. He’d made no argument against Fennette, and she’d probably been the only reason things took as long as they did.

Some part of him knew. He had enough pieces to put it together.

What would he do when he found out?

•••

“Are you all right?” Marinette asked Alya. “You look flushed.”

“I wanna fuck the shit out of Nino,” Alya muttered. Marinette blinked in alarm, and Alya immediately turned even more red. “I mean . . . erm . . .”

“You’re super horny?” Marinette said, trying to contain her laughter. Alya hit her arm.

“Yeah.” She grumbled after a minute. “Spring fever or whatever.”