This is a drabble that was suggested twice, without the two suggesters knowing of each other!
So, this is an idea by both DrafteeDragon on Ao3 and Lady Morgana from the Breeze server ;)
Enjoy~

"We need to go…", Adrien absentmindedly announced, staying right where he was, unmoving. Out of the corners of his eyes he saw Nino nodding. A minute later Alya followed, her head rubbing against his other shoulder where she leant against her boyfriend.

Another minute later he got a quiet reply.

"Mhm…", Nino solemnly agreed, not saying more than he needed to. A month ago, right after it had happened, he had stopped speaking for a few days, just like Alya. Shortly after the funeral he had found back to his words, feeling that something was finally over now. Alya had stayed silent.

The class had reacted almost the same. They had slowly began speaking again after the first shock had worn off, but stayed hesitant and gloomy.

Her parents hadn't taken it well. The bakery had closed the same day to an undefined date, to give them time to cope with this shock. Adrien hadn't seen them ever since it happened. After all they had lost their daughter, he hadn't had the courage to come to them and talk to them yet.

Alya had gone seeing them but she also hadn't stayed long. Partially maybe because she wouldn't talk anymore.

Adrien sighed as he stretched out his arms, but still not finding the strength to stand up yet. No visible response from his friends.

It had been a month now. A month ago, Alya and Nino had been just a little too late. Three weeks since Marinette had been lowered down into the earth. She would never come back again.

It was weird, honestly, sitting in front of her grave together with his friends. Every day after school they wandered to the graveyard and sat down in the mildly damp grass, staring at the wooden cross in front of them. The tomb for her grave hasn't yet been finished. Adrien had insisted on paying for it.

His eyes wandered over her name, written into the wood. Her birth date and a very recent one for her death. He sighed, his fingers ghosting over his ring. Right after the doctors had confirmed that they wouldn't be able to help Marinette anymore and that she was already gone, Adrien had told Nino he was Chat Noir. Just a day later both his friends had come to him with identical boxes, revealing a Miraculous and the fox and the turtle Kwami.

When he first saw them transforming, Adrien knew they would take Hawkmoth down. That he would pay for what he had done.

They had needed a few days to build their team, to let Alya and Nino get used to their powers and to find out where Hawkmoth hid away. When they had found out they had spied on him in turns, then they had agreed on a date. As fast as possible, actually. They couldn't bear seeing Marinette buried here while Hawkmoth was still free.

That was today. They wanted to take down Hawkmoth today. To tell Marinette as well they had visited her grave. But it didn't seem as if they would move anywhere from here.

"Guys…", Adrien tried again but nobody moved. Finally, after a helpless glance from Adrien's side, their Kwamis who had waited for them in a bit of distance flew over, Wayzz and Trixx beginning to nudge their wielders while Adrien reluctantly got to his feet. Plagg met his gaze as his friends got up as well, sighing.

"Wipe your cheek, kid."

Adrien reached up, his fingertips suddenly wet from tears he didn't know had fled his eyes.

"… S-Sorry…", he mumbled but Plagg shook his head, crossing his little paws.

"Focus, kid. You need your mind clear for today."

The blonde looked over to his friends, seeing Nino keeping an arm around Alya while Wayzz was talking to him about some kind of tactic. The girl next to him had sunken into herself, heavily leaning against her boyfriend while keeping her hands in front of her face. Adrien briefly saw the tail of a tiny fox swishing across her cheek before vanishing again.

"Do you think they're ready?", he quietly asked, his eyes filled with worry. Plagg eyed the new teammates, then hung his head before sighing.

"You'll have to be the front fighter. They're mostly tactics for now. But they're ready, yes. They're angry."

After a short hesitation his wielder nodded, determination finally shining through. With another brief glance back to the wooden cross on Marinette's grave he clenched his fists and squared his shoulders.

"We'll do this."

"Did it never occur to you that Miss Fortune could have lied?", Hawkmoth snarled, his face contorted in exhaustion and pain as he tried to stand tall. He apparently knew it was impossible for him to win this. Chat straightened, wincing at his wounds but clenching his jaw, speaking through his teeth as Firena and Carapace made themselves ready next to him.

"You don't have a chance, Hawkmoth. We'll arrest you and turn you over to the police. You'll rot in jail for your crimes!", Chat exclaimed, frowning.

"Akumas lie all the time, you idiot.", Hawkmoth cackled manically, then gave him a toothy grin that Chat saw more of him baring his teeth, "Did it never occur to you that you were the one at fault here?! For believing her, for digging Ladybug's grave yourself?!"

It was obvious the man was losing his mind but suddenly, Chat found himself freezing. What was he saying there? Was it just a desperate attempt to distract them? Or was it just him trying to hit Chat one last time? He felt Firena stiffen next to him, saw her questioningly tilting her head.

"Stop.", Carapace growled, his hand slowly pushing itself in front of his two teammates. The turtle themed hero moved a bit to the side, to partially cover his teammates from Hawkmoth as the maniac turned back to them, his eyes bright.

"What, you could've never just once considered that Ladybug might still be alive? That her life has been a living hell because you have made it to that? Because of a simple lie?!", Hawkmoth laughed louder, now Chat saw something running down his chin, something dark red. He apparently knew his time was up and wanted to hurt them one last time. But he wouldn't let him do that.

"You're lying, Hawkmoth.", he growled but something was nagging on his mind. Something that he indeed hadn't considered, "Ladybug would've shown up to come help me with the Akumas. She would've never let Marinette die in her misery. You're lying!"

It couldn't be the truth. He couldn't say the truth. If so, his lady had stayed hidden the entire time Marinette was beaten up for killing her. Marinette death couldn't have been for nothing.

Suddenly, Hawkmoth got calm and silent, which made him even more dangerous than before. With swift movements he pulled out a tiny box, one Chat knew all too well. His blood began boiling as he realized that was Ladybug's Miraculous in the hands of this asshole.

"Oh, am I?", Hawkmoth grinned viciously, opening the lid. A red light emerged from the earrings inside and temporarily blended the heroes, then a Kwami got visible. Ladybug's Kwami, Chat understood.

"MARINETTE!", it immediately cried out, reaching for something. Apparently she hadn't quite woken up yet, "No! Stay away, you beast! Marinette, there's an Akuma, it's-"

The Kwami stilled as she understood that she was somewhere entirely else than where she left off. She turned around, searching, until her eyes fell on the villain and the shocked heroes a bit away.

"… Where-… Where's Marinette…?", she weakly asked, her eyes filling with worry.

The first thing Chat remembered happening was Firena crumpling and Carapace leaping to catch her in time. While his best friend was busy trying to care for the passed-out girl in his arms, Chat's mind raced.

Marinette was Ladybug. But if Marinette was Ladybug, she had been all along. If Marinette was Ladybug… Oh god.

He gulped as the world began spinning, his head feeling like wool. His chest was heaving as he stared at Hawkmoth's grinning grimace.

Ladybug had been akumatized, Ladybug had been accused of-… Of killing Ladybug… She fell into depression, began drinking and cutting and-…

Chat sank down to his knees, his heart aching.

Ladybug killed herself. Ladybug committed suicide. Because-… Because of him… Because he was-…

Hawkmoth's laughter only numbly got through to him but it was enough to force him back on his feet. Adrien began running, opening his clenched fist.

Over the rushing blood in his ears he barely heard himself say the word he hadn't used in months. Had never considered using ever again.

"Cataclysm!"