a/n: This particular story (plus the next several that I'll be posting) were all written pre-S4 release and I just hadn't gotten around to editing/posting before, so a) they contain no spoilers and b) they aren't S4 compliant. Ideally I would have gotten them posted pre-S4, but life got in the way.

Anyway, enjoy the story!

"I wanted to help out with the project, but there was a family emergency," Susanna insisted, widening her eyes. "My cousin got hit by a car, and we all needed to help support my aunt. I didn't even have the time to text you guys or email Mendeleev and ask for an extension."

Debbie narrowed her eyes. "And let me guess, you want us to just ignore that we did all of your work for you and not tell Mendeleev that you were completely useless as a group member?"

Susanna gasped, throwing in a sniffle at the last moment. "But I didn't mean to be, there was a family emergency!"

"Just like the last time we had a group project, and the time before that, too?"

"I have a large family!"

"And that large family needs the help and support of a random thirteen-year-old cousin whenever things happen? So much help that you don't even have the time to text?"

"Guys, guys, calm down," Jean-Paul told them, stepping between the two girls. He looked over at Debbie imploringly. "Debs, it's not that big of a deal. It wasn't a large project."

Debbie scowled at him, already feeling her blood pressure starting to rise. All he ever did was make excuses for Susanna, even when she deserved neither excuses nor any sort of help at all. "So it shouldn't have been hard for her to do her part! And it got assigned last Wednesday. You could have started working on it then!"

"I had other stuff to do during the week and I thought that my weekend would be free!"

"Debbie, it's a family emergency, just drop it," Jean-Paul insisted. "Wouldn't you want us to be understanding if you were the one with the emergency and you couldn't get the work done?"

Debbie was pretty sure that she was seeing red. "If I had a family emergency, I would have taken the two seconds that it takes to send a text and let people know ahead of time! And I wouldn't make up a family emergency just because I'm too spoiled to help!"

Susanna reeled back. "You think that I'm lying? That's so- so-"

"It's out of line," Jean-Paul finished. He was frowning at Debbie now. "You can't just go around accusing people of lying without evidence! That's just mean." He turned to Susanna. "C'mon, let's go. I'll tell Mendeleev that you helped, then it'll be two against one."

With that, Debbie's two team members turned and left, leaving Debbie standing in the hallway and staring after them, absolutely incensed. How dumb could Jean-Paul be? It was obvious to anyone with a brain that Susanna was lying and just taking advantage of his crush on her to get out of the consequences of not helping with their group project. And now he was going to tell Mendeleev that Susanna had helped, he was going to lie for her!

Debbie. Was. Mad.

For several minutes, she stewed to herself in the hallway. How was she supposed to prove that she was right and Susanna was a liar who deserved a big fat zero on the project? Jessie was right, two against one saying that Susanna had helped would make Madam Mendeleev believe them over her. There wasn't any way to prove that she was telling the truth.

...or was there? After all, she still had the texts from the entire weekend, their group chat where she and Jean-Paul had essentially planned the whole project by themselves. And the site that they had used to put together their presentation recorded edits and how much time people had spent working on it. Both would prove that Susanna hadn't done any work, and then Madam Mendeleev could reach out to Susanna's family herself to ask about the family emergency and see if it really existed. Their teacher wasn't unreasonable, unlike Ms. Bustier. She would listen if Debbie had the evidence.

Already feeling better, Debbie headed towards her classroom, a bit of a spring in her step. She wouldn't be able to approach her teacher right away- class had already started while she was busy stewing about Susanna and Jessie- but she would no doubt be held for a few minutes after class because of her tardy and she could talk to her teacher then. Their presentation wasn't going to be for a few periods yet, so she still had time.

Across the courtyard, there was a cackle of distinctly akuma-like laughter before the locker room door was casually tossed off of its hinges. Debbie took one look and dove for her class's door.

She didn't know who had been akumatized or why, but she was not going to get caught up in that mess if she could help it.

Lila Rossi was the last person in the locker room. The bell had rung, the other students had gone to class, and she had been conveniently hidden away in a bathroom stall. She needed to be alone in the room to steal something- anything- from Chloe's locker and plant it in Marinette's.

She couldn't do the same thing that she had done before and plant one of her own possessions in Marinette's locker. No, doing the same thing twice in a row would be suspicious. But if she took something of Chloe's, the chances that the bratty blonde would notice and throw a fuss about it the next time she set foot in the locker room were high. And then, once she threw a fuss, everyone's lockers would be searched, and Marinette's reputation would be- well, not trashed right away, maybe, but it would be questioned.

And Lila wouldn't even have to lift a finger. Well, not once the initial stealing and placing of one of Chloe's things was done, that was.

Lila smirked, glancing around one more time before approaching the locker that she knew was Chloe's. She pulled it open, glanced around, and snagged a sparkly bracelet from the top shelf. It only took a minute to move it to Marinette's locker, and then Lila could move on and collect her own things. Before she could finish and leave the locker room, a purple butterfly caught her eye as it fluttered serenely across the room. Lila paused for a moment, wondering who might have attracted the akuma in the first place for half a second before she decided that it didn't matter. The original recipient didn't deserve whatever powers Hawkmoth was giving out today. Without even a second's hesitation, she pounced on the akuma. "Hawkmoth!"

"Hello, Truther," Hawkmoth's voice echoed in her head. "I am Hawkmoth. You're tired of people telling li-" He paused. "Ms. Rossi. Again?" There was a sigh. "Very well. You can take be the new Truther."

Lila screwed up her nose immediately, disgusted at the very idea. "Truther? Why would I want to make them tell the truth? Then my reputation-"

"You didn't let me finish," Hawkmoth cut across smoothly. "Your name will be the Truther, and your powers will force people to answer any question they're asked... untruthfully."

A grin appeared on Lila's face as she realized just what Hawkmoth was suggesting. How it was supposed to help him, she had no idea, but it would certainly help her. "So if I hit Ladybug with my powers and ask her if she's besties with Lila Rossi, for example, her answer will be..."

"Yes, of course, absolute best friends."

"And if I get that brat Marinette and ask why she thinks that I'm lying- if I ask her if she can prove any of my stories false-"

"She'll say that she is jealous or something similar, and that she can't prove that a single thing is fake."

"Fantastic." Lila's smirk turned vicious, and a cloud of purple enveloped her for a moment. When it cleared, the Truther stepped forward. "Time for me to go tear some people down and cement my reputation for good."

Class had just started and Ms. Bustier was in the middle of taking attendance when the door burst open and an akuma stomped through. Marinette took one look at the akuma and her sausage-roll hair and promptly dove under the desk and out of sight before the akuma had the chance to see her.

She didn't know what had caused Lila's latest akumatization, but it was better to play it safe rather than sorry when it came to Lila-kumas. The chances that Lila was going to target her for absolutely no good reason were just too high.

Next to Marinette, Alya gasped and whipped out her phone right away. "Ladybloggers, sound the akuma alert! We have a new akuma at Collège Francois-Dupont! We don't know a name or powers yet, but-"

"I am the Truther, and I am tired of being called a liar by jealous people!" the akuma announced, and Marinette raised an eyebrow. Seriously? The Truther? That was just bizarre, considering Lila's everything. "And I make people tell the truth!"

"Marinette, what did you do?" Alya hissed. "Did you two-"

"I hadn't even seen her this morning," Marinette hissed back, already ticked off. Something about this whole situation wasn't right. The sooner she could get out of here- without getting hit- the better. She didn't trust the Truter or her powers at all. "Someone else must have called her out on her ridiculous stories."

Alya sighed. "Marinette..."

"Why would you get truth powers?" Adrien asked dubiously, standing up at his desk. Marinette very nearly screeched what are you doing?, but stopped herself just in time. She was Ladybug, she had to get out of the classroom without getting hit. "Out of everyone in this classroom, it makes the least sense for you to get powers to make people tell the truth!"

The Truther pressed a hand to her chest, looking offended. "Really, that's so hurtful! You doubt my integrity? Why else would I have gotten powers like this?"

Adrien frowned. "Uh..."

"And for doubting me, you'll be my first subject!" The Truther announced, pointing her baton at Adrien. There was a flash of light before Adrien could dodge, and then the akuma smirked at him. "And for our first demonstration- what do you think of Lila Rossi?"

"She's kind, honest, pretty, and fun to work with," Adrien said at once. His features screwed up as soon as he finished talking. "Uh..."

He glanced back at the class, his gaze catching on Marinette as confusion flashed across his face. The Truther preened.

"You see? I force people to tell the actual truth. People lie to other people, they lie to themselves." The Truther bared her teeth, triumphant. "And the truth tells me that you don't actually think that I'm a liar!"

Marinette frowned from her hiding spot. She knew full well that Adrien did think that Lila was a liar- he knew that she was a liar. He hated working with her, because she was clingy and didn't respect his space and didn't listen to directions during photoshoots. He always said that she was borderline cruel when they were alone and she wasn't playing a part for other people. So what...

Did the Truther's powers make people give answers that she liked? Or was it simpler- maybe it just made people tell lies? The opposite of what they were thinking?

Either way, this could easily turn into a disaster. Unless other people caught on to what Lila's powers actually were, Lila could have her reputation cemented by the end of the day.

(She could not let Ladybug get hit. That- that could be a disaster, depending on what questions the Truther asked.)

But how could she figure out what the Truther's powers actually were? She had to do that in order to figure out how to expose it to everyone else in the class. And to do that...

Unfortunately, she was going to have to give away the fact that she was in the classroom after all. It would be better if she didn't have to do that- it would make it easier for her to get away-

"Wait, dude, I thought that you didn't like working with Lila," Nino objected. "I asked you about it before and you said that she was a pain to work with. But you actually did like working with her? Why would you say that you didn't, then?"

"I was worried about making other people upset," Adrien said at once. "If I admitted that I was actually having fun, I might offend- might offend others."

Marinette forced herself to block out both that and Alya's whispered "see?". It was the Truther's anti-truth powers that were making Adrien say that, which meant that it wasn't anywhere close to the truth. She couldn't get distracted by any of that. She had to focus on the important stuff, like the fact that Nino's comment-slash-question meant that the Truther's powers applied to questions that other people asked, not just what the akuma asked. Which meant that if Marinette asked any questions, the powers would still come into play. But she still didn't want to give away her position. With Adrien under the Truther's powers, Marinette was the next obvious target.

Maybe Alya could ask for her? Yes, that was a great idea!

"Alya," Marinette hissed. keeping her voice low. "Ask Adrien what color the sky is."

Alya shot her a baffled look. "What color- why?"

"Please!"

Alya shot her another look, then turned back to the front. "Adrien, what color is the sky right now?"

Adrien turned to Alya, clearly confused. "It's bright orange."

There was a pause, and then his confusion turned into a grin as Alya frowned, clearly thrown off. Marinette grinned from her hiding spot, absolutely thrilled.

The Truther's powers made people give an opposite answer to the truth, and not just about Lila-related questions. That made things a whole lot easier.

"Ask him what the name of your blog is!" Marinette hissed from her spot. Alya hesitated, then nodded.

"What's the name of my Ladybug blog?"

"The Cat Chat."

"What does Mr. Agreste do for his job?" Marinette prompted. This time, there was no hesitation from Alya.

"What does your father do for a living?"

"He cleans toilets."

"Wait, what the heck is going on?" Nino demanded, standing up. "Literally none of those answers are right!"

"I think," Alya said slowly, realization clearly dawning, "that Little Miss Truther is actually Little Miss Anti-Truther. Answers are the opposite of reality with her." She scowled, turning her phone towards the akuma. "Which, if that is what her powers actually are...that makes me wonder if she was actually lying when she told us all of her stories. She's trying to suppress the truth!"

The Truther snarled and stomped. "That's a lie! I expose the truth!"

"Then explain Adrien's answers!" Nino demanded, straightening up and glaring at the akuma. "When Alya asked him questions, all of his answers were obviously lies. And don't try to claim that he was doing it on purpose to discredit you!" Nino added, jabbing a finger at the Truther. "Adrien clearly had no idea what she was trying to do when she asked her first question!"

The Truther let out a scream of frustration. "He's an actor! Clearly he was acting-"

"You said that your powers make people tell the truth in response to questions, though," Alya chimed in. "No amount of acting is going to be able to override akuma powers!"

"He is, though! And-" The Truther paused, clearly trying to come up with an excuse. "My powers only work when I'm the one asking the question. He's just exploiting a loophole."

"Really." Alya crossed her arms, unimpressed. "Then you ask Adrien what his father does for a living, then!"

"No!"

"If what you said is true, it shouldn't be a problem!" Alix chimed in, surging to her feet as well. "The fact that you're refusing proves that it's a lie!"

"Yeah!"

"Exactly!"

"What a loser, I can't believe that we believed her!"

The Truther shook her head, panic flashing across her face briefly. Clearly she hadn't expected this to happen. "No, you aren't giving me the chance to explain-"

"The chance to come up with more lies, you mean!" Kim yelled. "We aren't fooled anymore, Truther! And because Alya's streaming live, the rest of Paris isn't going to be fooled either!"

The Truther screamed, then dove for Alya. In the split-second before she was tackled, Alya flashed a look at Marinette.

"Run! You're going to be her target next!"

Marinette ran, bolting out of her hiding spot.

"That was really quick thinking, Marinette!" Tikki piped up as Marinette raced down the hallway. If she could get to the library, she could transform, go out the windows there, and then burst through the window of Ms. Bustier's classroom. "Now no one will believe anything that the Truther or Lila says! I was really worried for a minute there that she would force you and Adrien to discredit yourselves!"

"I was worried, too," Marinette admitted. "With those powers, and that name... but at least it backfired!"

If it hadn't, if Alya had given Marinette's location away and she had gotten hit... unless the Truther's powers came to light in some other way, that could have destroyed any chance of ever getting the rest of the class to believe her about Lila's lies. Even if she tried to explain things later on, she would have already been forced to discredit herself and no one would believe a single thing that she was saying.

Not that they had before, either, but there wouldn't even be a glimmer of doubt in their eyes if the Truther had been successful. And that would be super frustrating.

With a gulp, Marinette wondered if that would have been the thing to drive her to akumatization. She probably would have felt absolutely helpless to change anything and furious at Lila, trapped like a caged animal.

It was a scary picture, but at least that possibility was gone.

"We're safe," Marinette told Tikki when she got to a secluded corner of the library. She gave a determined nod to her kwami, already in Superhero Mode. "Now let's go catch ourselves a liar!"

With the entire basis of her powers already debunked and an entire class ticked off at Lila, it didn't take long at all to bring the Truther down. The remainder of Ms. Bustier's class had already half-contained the akuma by the time Ladybug burst through the windows, and with them holding the Truther down, she couldn't throw any blasts at Ladybug. It only took a minute to find the possessed item- a bracelet- and then Ladybug was smashing it and releasing the corrupted butterfly. One purification and a Cure later, and Lila was left sulking in the middle of the classroom floor.

Ladybug frowned at that, slightly puzzled. Usually akuma victims were left somewhat disoriented after they were akumatized. None of them ever remembered what they had done during the akumatization. Everything from when the darkness bubbled over them to the purification was left a blank.

And yet Lila clearly knew that that her lies had been outed while she was akumatized. There was no reason for her to be so sulky already otherwise.

So what did that mean? She would have to talk to Tikki later and see if her kwami might have any ideas. Normally she might suspect that Lila's apparent lack of memory loss had to do with the number of times that she had been akumatized, but Mr. Ramier had been akumatized a ton of times and always seemed to have a moment of "huh?" whenever he came out of it.

...did Lila's response maybe indicate that the akumatization had been a choice?

There wouldn't be any way to prove that if it was true, Ladybug knew. It wasn't like Lila would actually tell her the truth if she asked about it. But it was something that she might have to keep an eye on in the future.

"I would ask if you and Lila were actually friends or not, but I think I might know the answer already," Alya told Ladybug dryly, rubbing at her elbow absently. The Miraculous Cure might have fixed all of the assorted injuries that people had gotten for fighting an akuma without superpowers, but sometimes phantom pains from the injuries that people had gotten lingered for a few minutes. "Wow, that akumatization sure backfired on her. I bet she's ticked off at Hawkmoth right now."

Ladybug had to grin at that. "Yeah, we definitely aren't friends of any sort. And, uh." She paused, unsure about if she wanted to continue. On one hand, it would really help if she could get more evidence either confirming or denying Lila's willing participation in her akumatization, and now that Alya had caught on to the lies, she would definitely be all over that. On the other hand, if she was wrong and Lila hadn't gotten akumatized on purpose, then she might just be stirring things up in the classroom even more. She warred with herself for a moment, then decided to go for it. If it made things worse for Lila, well, Lila deserved it. "I kind of found the akumatization really weird. Like, had anyone even talked to Lila today?"

Alya frowned at that. "Huh. I- I don't know for sure, but I don't think so. The only people who have ever obviously not liked Lila were Adrien and Marinette, and they had gone up to the classroom before Lila even got to school. Then I think Lila went to the bathroom, and- actually, I didn't see her again before I came up, and I was down there practically until the bell rang." She looked at Ladybug and gasped. "Do- do you think that she got akumatized on purpose?"

Well, yes, but Ladybug wasn't about to say that. "I don't know, but I am curious. Do you think that you could maybe do a little investigative work for me and see if anyone talked to Lila this morning before she got akumatized? Talked and implied that she was lying, that is. Or if there was anyone else in the school today who was upset about someone lying, because maybe they would have been Hawkmoth's initial target."

Alya was already nodding. "Yeah, I'll do that! And I'll tell you next time I see you- if it's safe, I know, I know!" she added before Ladybug could say anything. "I'm not going to take any risks or get in your way during a fight!"

Ladybug doubted that a little bit- Alya could sometimes be really single-minded when recording for the Ladyblog and often put herself in dangerous situations without fully realized it- but she appreciated the thought. "Right. And it's not, like, urgent information," she told Alya. "It's not like we could really do anything about it, since akuma victims are off-limits prosecution-wise and we can't prove anything. But it would just be interesting information for the future. So seriously, there's no rush to tell me as soon as you find out, whenever's fine."

(She would almost definitely be getting updates from Alya as Marinette as well, so really, it didn't matter when Ladybug was told.)

Alya nodded, clearly still determined to gather her data as quickly and thoroughly as possible. "Of course! And- and thank you for trusting me with the job after I, uh, didn't fact-check Lila at all before," she added, a little quieter. "I'll do better in the future."

"I'm glad to hear that! But for now- bug out!" Ladybug flashed the class- well, besides Lila, who was still scowling, and Adrien, who had vanished- a smile, then cast out her yo-yo and zipped off before she could start laughing at Lila's misfortune.

Really, if Lila had willingly been akumatized, that was possibly the funniest thing to happen in a while. It had backfired on her spectacularly, destroying all of her credibility in one go. No one was going to believe her now, and unless Ladybug's ears had been deceiving her, Ms. Bustier had already been on the phone with Lila's mom by the time she took off. Lila's kingdom was falling down around her ears, and there was absolutely nothing she could do to stop it now.

And really, it was all thanks to Hawkmoth.

a/n: As with a great deal of my stories, this is a one-shot and is therefore complete.

And as always, comments make my day!

(also if anyone didn't read the author's note at the start of the chapter and whines in the comments about how this isn't Season 4 compliant, I reserve the right to come after you with a machete.)