Upheaval of Peace

I do not own One Piece and BNHA! ALSO! this is my first story so criticisms are fine uwu

"Luffy best boi" - Talking

"Luffy best boi" - Thoughts

Luffy best boi - Sentences

"LUFFY BEST BOI" - All Might Muscle Form, Anger

Somewhere in Musutafu

In the peaceful streets of Musutafu, there was a Hero, A Hero looked up to by everyone in Japan due to his bravery and the ability to turn fear into hope, he can solve every predicament with his overwhelming strength with ease, his Courage and Bravery was second to none and the Power that he possess to resolve the problems of Musutafu and eliminate the threats of Villains was the reason many looked up to him in the first place, and that Hero was All Might, the Former Number 1 Hero, the Hero that every Villain feared and the Hero that Japan loved and admired with all their hearts.

And in those same peaceful streets there was All Might, He wore a relaxed smile on his face despite of being on guard because it was supposedly time for his patrol today but nonetheless he was on cloud nine, He was at first feeling guilty about dropping Important details during his talk with his Successor and he thought that he ultimately disregarded his feelings and only cared for his own to get his own feelings across the boy but fortunately, that wasn't the case.

"I'm glad that Young Midoriya isn't angry or thinks that im empathetic for telling him those things..."  All Might thought as he jumped and soared through the sky while patrolling the city of Mustafu "I thought he would hate me for giving him something so dangerous..."

All Might continued his patrol while in a good mood as he jumped his way through the buildings with relative ease as he's not burden by his wound anymore.

All Might was about to end his usual daily patrol to return to U.A Highschool when he suddenly heard a fearful shriek not too far from him

"uh oh, someone's in trouble! Guess I'm going to be late for Young Midoriya's Class again, but I gotta finish this up quickly or else Principal Nezu's gonna cut off my Salary for being late again..." All Might said before mustering his strength to his legs and hurriedly jumped over to the source of the shriek that he had heard...

When All Might arrived at the place, he was remotely confused because no one was there, not a single person nor Villain...

"Was I too late? no..." All Might thought before straightening himself out while he clutched his fists

"No matter who you are, you may come out now... I may not see you but you're just as exposed because I can sense your Evil Intent... It is useless to hide, VILLAIN!" All Might yelled out and as he expected someone came out, just behind his back hiding on his sight, the "Villain" was clapping as he fully revealed themselves to All Might who's face were slowly replaced by astonishment as he saw a very familiar Villain...

"You never change, All Might... That's exactly what I like about you..." The Villain's cold voice said as a shadow began to emerge and there the Villain stood in front of All Might who's mouth was agape...

There stood a very talk and bulky man who wields a chainsaw on his left hand, some people these days might not recognize this Villain but for All Might, he was a legitimate threat

"Y-You're...! Toxic Chainsaw?!" All Might said in a astonished voice, the Villain in question, Toxic Chainsaw can only grin widely at him

"Oh? So you still recognize me, I'm so relieved, I thought you simply forgot the people you sent to Tartarus, All Might..." Toxic Chainsaw said in a very obvious sarcastic way as he held his dear Chainsaw for All Might to see

"How can I not recognize YOU! you're one of the most evil Villains I've faced in my entire career as a Hero!" All Might thought before shaking his head and faced the Villain in front of him

"So? have you come to take Revenge on me for sending you to jail? I'll have you know that I'm very b-" All Might was still speaking before Toxic Chainsaw's grin grew wider and used this as an opportunity to attack, Toxic Chainsaw quickly revved up his Chainsaw and lunged at All Might who was caught in surprise

All Might quickly regained his composure and swiftly dodged the Chainsaw millimeters away from hitting him before jumping away from the Villain

"You don't let people finish speaking do you?" All Might said while wiping the sweat on his temple

"Cuz... It's been a while since I've been in the outside world, the fresh air is sickening and the peacefulness is fucking boring." Toxic Chainsaw responded to All Might "And since you, the reason for this fucking peacefulness are here, I can't simply wait for you to finish your stupid dialogues All Might..." All Might clicked his tongue at him before responding

"I've heard a scream coming from here not too long ago, Toxic Chainsaw... What did you do to that Civilian?" All Might said in a serious voice, his eyes were shadowed and his trademark smile isn't plastered on his face, seeing this Toxic Chainsaw grinned evilly

"Oh? that woman...? I killed her." Toxic Chainsaw simply said with a wide grin on his face, something within All Might snapped when he heard him said that, All Might was shaking in anger, gritting his teeth and clutching his fist hard

"Ahhhhh~ I miss that feeling, the feeling of my Chainsaw ripping the flesh and innards of people and their dying screams filling my ears, Killing never gets boring!" Toxic Chainsaw said while grinning maniacally, hugging his Chainsaw to his chest

"YOU EVIL BASTARD!"

All Might's anger filled holler rang the area as he pounced at Toxic Chainsaw with unbelievable speed, even Toxic Chainsaw was caught off guard as his face met All Might's fist, blasting him through blocks of buildings away from the Hero

"THE FUCK'S GOING ON?! I THOUGHT ALL MIGHT IS FUCKING WEAKENED?! DID THAT POTATO HEAD BASTARD LIE TO ME?!" Toxic Chainsaw angrily yelled out, not far from him a furious looking All Might was walking up to him slowly he looks like as if he coming to kill him, seeing All Might looking more like a Villain than a Hero pleased Toxic Chainsaw to no ends...

"THAT'S RIGHT, GET ANGRY ALL MIGHT, LET HATRED CLOUD YOUR JUDGEMENT AND FILL YOUR HEART WITH VENGEANCE, LET CORRUPTION CREEP WITHIN YOUR JUSTICE..." Toxic Chainsaw maniacally yelled out to All Might who wasn't having it, he was too angry to hear what he was saying

All Might was truly furious but within, he was despairing.

"I've failed to save a life again... I'm really sorry Master." All Might dejectedly thought of his Master

All Might left his thoughts behind as he started running at Toxic Chainsaw who started to rev his Chainsaw up

And there, the Hero and the Villain fought

All Might being at his peak form again was flawlessly dodging every swing and attempted attacks that Toxic Chainsaw dish at him, which visibly annoyed the Villain

"Time to finish this, Toxic Chainsaw!" All Might said as he powered up his arm with his Quirk, seeing that All Might's arm started glowing, Toxic Chainsaw knew what he had to do next

"So you're finally using your Quick huh? then..." Toxic Chainsaw then took something out of his pocket and threw it to the ground

"TOXIC TEAR GAS!" as Toxic Chainsaw yelled that, a gaseous cloud of smoke began filling the air and seeing the ominous color of the smoke, All Might withdrew his attempt to rush at Toxic Chainsaw within the smoke and powered up his arms with his Quirk again

"DETROIT SMAAAAASH!" All Might yelled out as he sent a strong gust of wind towards the cloud of toxic smoke that Toxic Chainsaw created and blew it all away, gust of wind that All Might delivered was so strong that the sunny weather changed and it began raining.

"TOXIN NEEDLES" suddenly countless glittering Needles were coming at All Might at high speed, All Might saw this and just casually dodged them, and the one who threw those needles was of course Toxic Chainsaw

"There's nothing you can hide from now, Toxic Chainsaw..." All Might menacingly said to the Villain who only shrugged his shoulders

"Tsk, so that couldn't stop you either huh, you don't look like you're weakened at all." Toxic Chainsaw simply said

All Might raised an eye brow at this but he decided not to press the Villain as he was confident that he'll catch him either way, he could ask questions to Toxic Chainsaw later, what matters right now to him is doing his job, to ensure peace.

"I'm throwing you back at Tartarus again, TOXIC CHAINSAW!"

"IF YOU CAN THEN TRY IT, ALL MIGHT!"

Every minute, every second of the battle was getting heated and Intense, the Hero and the Villain were trading blows and dishing out their own special attacks with their Quirks, both of them didn't want to budge an inch, they were at each other's throats

All Might last fought Toxic Chainsaw years ago and was surprised that he was still able to keep up to him even at his peak form, All Might thought that it really is time to wrap things up

Toxic Chainsaw had violet bruises all over his body, his muscles were beaten to a pulp but he was still barely holding himself up, while All Might still had wounds here and there but he was fine...

"Surrender now Toxic Chainsaw, you can't d-" All Might was about tell the Villain off but all of a sudden he felt his head throbbing hard, his body was heating up and numb...

All Might Immediately dropped to his knees, confused of what was happening within his body, and there, he heard a goose bump inducing giggles... it was from Toxic Chainsaw.

"It looks like my Paralyzing and Toxic Poisons are starting to kick up right there" Toxic Chainsaw said while grinning "You've may have not forgotten me but you seemed to forgot how I do things All Might..."

All Might was still on his knees coughing up blood and could barely feel his body because of the Paralyzing Poison that Toxic Chainsaw managed to apply to his scars

"You think you can beat me just by poisoning me?!" All Might said while huffing a mouthful of air so he won't pass out "This isn't good... I can tell that the poison is quickly spreading to my body, If I don't wrap this up fast, something bad will happen again..." All Might thought before his attention was drawn to Toxic Chainsaw again when he heard him speak

"Oh I know I can't beat you... but 'SHE' can." Toxic Chainsaw enigmatically said to All Might before pointing up

All Might knew what he said was a bad premonition and quickly stood up, Ignoring his aching, paralyzed body, All Might knew what he had to do, he had to beat the Villain in front of him right now so he could get away, so he could see his promising Successor become the Number 1 Hero... So he could still keep his promise...

Suddenly, a gun shot rang and filled the air, the sound of the bullet cartridge falling can be heard before the silence took over once again...

The bullet hit All Might in the chest, as All Might began to look up, he saw a familiar looking face... he stretched his sights as far as he could and saw the person who shot him.

"Y-You're... Tsu...tsumi..." Those were All Might's last words before his vision began to fade and he fell to the ground.

"I'm sorry, All Might..."

Police Force HQ

In the tight surveillance of Police Force was Shigaraki Tomura, he was chained up, locked up and seemed like he'll never see the light of the day again, but he was fine with it, he didn't care about anything anymore...

He just wanted to see his Mother again.

"I want to meet her... Mother..." Shigaraki's whispers were unheard by anyone... but that's what he thought.

"Do you want to meet your Mother Tomura?" Shigaraki heard a voice in his head and suddenly he was back at the back of his mind again, and in front of him was the Person that he had betrayed, the Person who provided him with everything he wanted and needed to do, in front of him was his Master, All for One.

"M-Master? what are you still doing here?! I thought I rejected you completely!" Shigaraki Tomura said quietly, his voice had an evident tinge of surprise but he was still feeling empty so it looked like he wasn't astonished at the sight of his former Master.

"How are you Tomura? I was able to meet you again because you've opened up your heart to me once again, even though it is not Intentional it seems..." All for One simply said to him

"W-what...?" Tomura was confused, he had betrayed him so why is his Master still here? due to his confusion he wasn't able to respond to him but All for One decided to break the silence and talked again

"Tomura, do you want to meet your Mother?"

Those are the words that went out of his Master's mouth, Shigaraki was wide eyed and his mouth agape, not only that he was able to see his Master again but him saying that he had the chance to meet his Mother filled his empty heart with hope...

"M-Master, I-I WANT TO MEET HER! I WANT TO SEE MY MOTHER AGAIN!" Shigaraki cried out to his Master, All for One smiled at his student and nodded

"I see, I see, Tomura If you want to meet her badly... THEN I'LL SEND YOU TO HELL." All for One angrily yelled out before grabbing Shigaraki's head, Shigaraki screamed and was obviously in pain as he tried to pry off his Master's hand that was keeping him contained

"If it wasn't for me... YOU WOULD BE NOTHING, YOU DARE BITE THE HAND THAT FEEDS YOU? TOMURA!"

"M-MASTDER FOFGIB M-" Shigaraki struggled on All for One's grip but it was futile, he was strong, Shigaraki wasn't able to do anything as he began to feel weak, his vision was blurry and he was starting to remember the face of his Mother at his last moments...

"M-Mother... I'm sorry..."

and there Shigaraki Tomura perished...