Summary: A mysterious teen literally crashes into Marinette's life.

1. Encounter

A sunkissed 15-year-old – easily mistaken for a boy were it not for her straw-blonde hair being tied up in a pair of small, messy pigtails – was falling from the sky screaming. Only the metallic object in her hands briefly extending before instantly shrinking again softened the impact.

In class, Marinette sighed dreamily as she lowered her head onto her crossed arms with gaze locked onto the back of Adrien's head as he took notes. I really need to think of a way to ask him on a date without making such a fool of myself!

Her head snapped up, bright azure eyes finding the source of the crash even as pieces of glass shattered onto the floor. Ignoring her classmates' surprised exclamations and the screams from a few (Chloé, naturally, being the loudest), the teenager went into her 'Ladybug mode'. Marinette rapidly took note of the youngster somersaulting from their momentum to the classroom's door coming to a stop against it with a slam, groaning. She was not the only one shocked to see the stranger clutching Cat Nóir's Staff.

"What is the meaning of this?!" Miss Bustier exclaimed, though Marinette could hear a tinge of worry in the young-ish woman's voice as she approached the fallen girl.

"Who is she?" Nino wondered aloud even as Alya whipped out her Smartphone to video the scene.

The blond mumbled under her breath while shifting a little. She ignored the people around herself, even Miss Bustier when the teacher squatted beside her asking if she was all right.

The silence stretched on until an unfamiliar voice mumbled: "…Owie."

"Hmph! That's what you get for being a reckless idiot." At the sudden voice seemingly from nowhere, Adrien froze (WHAT?!) and the rest of his class looked around for who just said that.

The girl scowled. "Plagg, shut up; I'm not in the mood!"

A tiny black creature that resembled a cat floated out of her denim jacket's breastpocket. "Too bad, 'cause I AM in the mood!"

"What is that?!" Chloé shrieked, accompanied by several other noises of surprise. "EW, a floating rat!"

Mystery girl's head snapped up and she glared at Chloé over her shoulder. Marinette let out a soft gasp unheard by the others – those eyes were exactly like hers! "He's not a rat; he's a Kwami, you ignoramus!"

Que a mental freak out from the two resident superheroes. As if the kid's resemblance to Adrien's dead mother and uncanny likeness of eyes to Marinette's own were not alarming enough!

"What's a Kwami?" Alya asked, zooming in on Plagg.

Mystery girl blinked in surprise. "It's him that lets Dad turn into Cat Nóir," she stated matter-of-factly, looking at the auburnette as though the creator of LadyBlog should know this already.

"Wait, Dad?!" Alix questioned, tilting her head. "Are you saying you're Cat Nóir's DAUGHTER?"

Mystery girl rolled her eyes – from Adrien's point of view, in a very Ladybug fashion – as she answered: "Duh! Why do you think I have his Staff? Grabbed it during the Akuma fight."

"Which you should never have been anywhere near of in the first place!" Plagg snapped. The male teen superhero was too stunned by this point for the uncharacteristic worry in his tiny friend's voice to register. "Chat specifically told you to stay safe. But did you listen? Nooo! Couldn't let him and Ladybug handle it, could you?"

"Okay, okay, I get it!"

"Really?" She glared at him for the sarcasm. "Because, in case you haven't noticed, we're stuck 20 years in the past!"

"So? Big whoop. Ladybug's Miraculous Cure is gonna send us back any second now."

"Hold on a second!" Both turned to look at a highly annoyed Chloé. "This whole thing has to be a hoax. There is no way you are from the future."

There were muttered agreements to this declaration, though Alya and Nino did not look convinced. Marinette and Adrien were too busy having a mental meltdown to pay much attention – the latter far more so than the former, considering her main issue with the situation was the presence of her partner's Kwami.

"Oh really? Could anyone but Chat's kid do this?" With that, mystery girl slammed one end of the Staff on the floor and rose to the ceiling. She then lowered herself, landing on her feet. "Was that demonstration enough fur mew?"

The class stared some more, though Marinette couldn't help thinking: Yup, that's Chat's daughter all right.

Meanwhile, Miss Bustier was on her way back from having gone to retrieve the principal just before Future Plagg first spoke. There was a commotion in the classroom, prompting her to silently wonder if she should have stayed with her students and sent one of them get Mr Damocles instead of going herself.

The newest transfer student, an Italian girl named Lila, quickly hid from the adults' sight. What are they doing?

"Anyway, gotta split before I ruin the timeline even more than I already have. Plagg, got the r– Err… Miraculus?"

"Nope, Chat does."

"Shit." Anything else she would have said was cut off by Alya questioning her about what a Miraculus was. "It's an object that, combined with Plagg here, gives Dad the ability to transform. …Umm, Alya?"

"How do you know my name?" the bespectacled girl asked.

Mystery girl snorted. "Who doesn't know the runner of LadyBlog? Regardless, I need you to promise that you'll never post that video you just took."

"What?! But this is golden material!"

"I know. Still, it's bad enough everyone here knows about Plagg and me. We can't have the whole world know too!" She looked at the Kwami perched on her shoulder. "Right, Plagg?"

"…You owe me a month's worth of Camembert."

"Seriously? Never mind, no idea why I'm surprised." Heading to the window with Plagg returning into her pocket, mystery girl gave a cheeky grin and a friendly wave before vaulting out the way she came.

The others yelled out, Adrien rushing to the window followed closely by Nino, Alya and Marinette. They watched wide-eyed as she somersaulted through the air and landed in a squat. As she straightened, mystery kid swayed for a moment in pain and dizziness. With another wave of her hand, she put the Staff into her backpack, swung it onto her back and walked off.

A.N.: I'm fond of kid-time-travels-to-past-and-meets-parents stories, so started looking for a 'Miraculous Tales of Ladybug and Cat Nóir' one to no avail. So I wrote one instead!

I'm using Chat as a nickname of sorts for Cat Nóir. And, coz "Miraculous Ladybug!" sounds cool yet stupid at the same time, I switched her name with Cure since that light thingy fixes everything. Was going to go with Light, but figured Cure fits better. Lastly, I say 'Miraculus' instead of 'Miraculous' when referring to the power-giving jewellery to avoid confusion between the two words.

I'm not very happy with this chapter. Any ideas on improvements?

PS. I made Chloé annoyed a LOT instead of displeased, since she does not know Chat is Adrien and therefore has no reason to dislike said guy's kid beyond not wanting a random stranger making her look a fool (which I imagine a person as self-centred as her would think when faced with such an odd situation, despite the 'hoax' not even being aimed at her in the least).

And I added Lila, coz this fic takes place immediately after 'Volpina'. She probably won't play any role, though. Assuming she transferred on September 1st, it's been exactly one year since 'Origins Part 2'.