"Set your heart ablaze!"
---
Everyone in Class 1-A watched in horror as they saw in the broadcast. Their classmate, a friend, fighting a powerful demon to the death.
"With those injuries. Don't lose yet Tomioka. I know you can still win it." Tokoyami stated, clutching his hand into fist.
"Y/n.. " Uraraka uttered, hands over mouth.
Aoyama, Sato, Shouji and Ojiro were speechless.
"Tomioka's amazing slashes on the villain were already healed! Just how strong does his regenerating ability is?!" Kaminari exclaims.
"Come on man.." Sero uttered.
"This is bad! His opponent doesn't even get tired out after all that?!" Mineta exclaimed but he's deeply worried. Jirou and Hagakure watched everything at the hospital.
"Y/n-chan..." Asui remembers when Y/n save her and Uraraka. She doesn't want to see those again. She doesn't want to lose her friend. Koda, and Ashido, have tears formed in their eyes.
---
Midoriya and the others arrived at the battle zone and called out to their classmate's name.
Y/n slowly turn his head towards Midoriya and the others, seeing a worried displayed on their faces.
Midoriya narrowed his gaze, trying to tell Y/n that he's going to assist him.
He shook his head before giving them a reassuring expression. 'I got this, guys.'
'I don't have anymore stamina to use other Breathing style..
I guess I'll have to defeat Akaza with one last assault.'
Y/n took a last breath, before he turn to face Akaza unleashing his unwavering determination and overwhelming flaming aura. Everyone nearby felt it.
"So that's how it's going to be." Akaza says,
Y/n lifts his blade and assumes a stance.
"I will fulfill what was entrusted to me! I won't let anyone die here and going to slay all the demons!"
'Right now, I'm agaisnt someone so strong that can overwhelmed me. Completely different from all the villains I faced. Now I understand how the intense struggle to survive increases in one's skills.'
At this moment, Y/n's senses awakened and a flame mark appeared on his top left of his forehead and his chest, slightly left of center.
'In one moment, I'm going to thoroughly hollow out most of the area.
Rengoku-san, I can feel the burning heat in my heart now.'
"Flame breathing, Esoteric Art!"
(Honō no kokyū, Ougi)
The flaming aura explodes from the swordsman, giving everyone around him goosebumps, including Akaza.
"What an impressive fighting spirit!
To press on despite your bodily injuries!
That brilliant strength of mind!
And that Iron clad stance!" Akaza expresses his amazement.
In Akaza's eyes, his vision flickered to the same moment with the Flame Hashira. 'Kyojuro.. No.. All of them chose Y/n as their successor.'
"heHEhAHAHAHA! Now you have to become a demon!
Just imagine it!
WE'D BE ABLE TO FIGHT EACH OTHER FOR THE REST OF ETERNITY!!!"
The Breath of Flame is organized into nine different forms. And the ultimate technique "ninth form" was basis on their surname.
This is a slash that pours out one's whole body and soul, even it's own life.
'Set your heart ablaze, Y/n! Burn beyond you're limits!'
"I am the Swordsman Hero: Hashira and the last Pillar of Demon Slayer Corps, Tomioka Y/n!"
"Ninth Form: Purgatory!"
(Ku no kata: Rengoku)
"Destructive Death: Annihilation type!"
(Hakai Satsu: Messhiki)
Y/n initiates a devastating dash, the technique takes the form of a titanic flaming dragon with blue eyes that emits blue streaks of electricity from its mouth.
Akaza lunges forward, punching with so much force it creates a shockwave that decimates the surroundings and going through.
The surroundings were seemingly engulfed in flames, creating a purgatory-like hellscape and a giant whirlwind of heat and fire in the wake of the attack.
"Y/n!!!" Midoriya and the others screamed his name.
Inside the hellscape flaming whirlwind, Y/n swung his down and sliced Akaza's arm who maniacally laughed.
"HEHAHAHHAHAHAHAHA!!!"
Y/n lift his blade back before he went straight for the neck only to be deflected by Akaza pushing the blade to his body.
The young swordsman narrowed his gaze, he knew that Akaza could predict his movements by sensing the fighting spirit.
'That compass needle.. In that case, I'll have erase all of it.'
Akaza's confidence boosted as he could predict his opponent's movements.
Y/n turn his blade around and slice upward.
'Close of all of the senses.'
'Clear your mind.'
'Concentrate! Concentrate..! You have to concentrate..!'
Focusing on a particular moment, closing of all of his senses and clear his mind, entering a selfless state.
"You had your chances to become a demon, Y/n! Now die and be with your ancestor!" Akaza says, he tries to behead Y/n.
Before Akaza's arm could reach, Y/n instantly vanish and appeared behind Akaza.
The Uppermoon turns to strike, but Y/n dodges. Akaza could not detect his fighting spirit via the compass.
'... What? He vanished?! Where are his fighting spirit?'
"Akaza! I'm going to cut your head!"
Akaza strike his fist, attempting to crush Y/n's head.
"Dance of the fire god: The Setting Sun."
(Hinokami Kagura: Shayō Tenshin)
Y/n evades Akaza's fist and delivers an upended flaming sword slash, severing Akaza's head off.
'I did it! I cut his head off!'
But, instead of having an shock expression about his head getting cut off, Akaza grinned as his head begin to disintegrate. The body curled its hand into fist and strike at Y/n.
"What..!"
A loud thud was heard from the inside and the flaming whirlwind began to disappear leaving only dusts, that is slowly dispersing.
Everyone helplessly awaits for the dust clear to see what happened.
"Young Tomioka?"
"What an incredible technique." Gran Torino quietly remark.
"That hellscape came from a kid. What in the world is he?" Endeavor added.
"Y/n!" Midoriya calls out again.
The dust disperses, Y/n's figure was seen first then the headless demon.
"I can see him! And.. The demon is headless..!"
"R-really?!" Yaoyoruzo asked, as everyone begin to relief.
"Yeah! He did it! He-" Kirishima words were stolen by fear.
The audience around the world is visibly horrified. The mother turn away with his child from the large screen, not wanting his son to see a horrifying sight.
Y/n stared with wide eyes and coughed some of his blood.
The dust clearly fade and..
it reveals Akaza's headless body had impaled his arm through Y/n's solar plexus.
"Young Tomioka.. No... No way..." All Might uttered, as he helplessly watch in horror.
"Y/n!!!!!" Midoriya screamed as well.
Aizawa doesn't want to believe what he's seeing, his heart hammered in his chest.
Yaoyorozu cover her mouth and falls down to her knees as she trembled inside.
Bakugou, Kirishima, Todoroki, and Iida had pure distressed on their faces. Everyone else had various shock reaction at the sight.
.
.
.
Even though I severed his head first, he moved his body and struck his arm through me.
Wait. Why isn't his body crumbling? My eyes widened when I saw Akaza's head is starting to regrow. It can't be..
"Severing my head that simple is futile now. My head is no longer my weakpoint."
I just only stared in disbelief at Akaza as he finished regrowing his head, bluntly looked at me.
"Do you see the situation you're in! This is exactly how Kyojurou died! You'll die too!
Don't be like him and become a demon! Just say you'll become a demon!
You are strong and one of the chosen ones!"
"The duty of those born strong is to help the weak.
That's what my mother taught me.
I am the luckiest man to be your cultivator Y/n, my boy!
I'm quite proud of it!"
I felt a hand press on my hand that holding my blade. I glance to my side, seeing a glowing spirit of Rengoku smiling at me.
"Keep on moving forth, scream and shout you're pain, Y/n, my boy."
"That's right Y/n! Don't give up!"
Another hand placed on mine, hearing the voice belong to Tanjiro before I lowered my head.
"Akaza.. You want me to become a demon?" I asked quietly, Akaza smirked.
"So be it.. Let me show you the demon that will end Kibutsuji Muzan!"
Unleashing my strength, I tightly grip on my nichirin blade and swing it into Akaza's neck. It frightened the Uppermoon as he sees me.
My (e/c) eyes pupils become slit, a black demon crest, fluid-water like design appeared on my left cheek and the rest side of my body, and veins were visible in my forehead. All of my injuries before begin to heal instantly, I opened my left eye.
"What is this?! Why am I sensing a demon aura from this kid?!" Akaza's eyes widen, looking at my new appearance in disbelief.
"I see.. So this is your Quirk! A Demon!"
I let out a shout as I drive my nichirin blade deeper. Akaza tries to hit me with a punch, but his arm got restrained by a cloth.
'Aizawa-sensei?!'
"I won't let you! Now Tomioka, finish him!" Aizawa shouted as he pull the cloth to keep Akaza's arm back.
I look behind the Uppermoon and notice the sun is about to come up. Akaza begins to panic when he noticed it.
"Damn it! There'll be sunlight here! I have to get out of here!!"
Akaza tries to free himself from my hold, but I hold on tightly to his wrist and tensing up all of my muscles, not wanting to let him escape.
"Wha- I can't pull my arm!" Akaza remembers how he got in this situation with Rengoku. "What are you doing?! The sun is coming up!"
"You're not escaping, Akaza! Not until I cut your head off!"
"Ninpo: Thousand Sheet Pierce!"
Edgeshot flattens and twists himself into a pointed string and then pierces Akaza making him stiffened.
"You bastards!" Akaza glared at Edgeshot. The Uppermoon let out desperate shout as he tries to free himself.
"Get out of my way!!!"
I let out another determined shout as my blade moves deeper into Akaza's neck, now reaching its center.
"Hurry! Before the demon escape!"
I heard the others voice, coming towards us. But never bother to turn my attention away and focused on Akaza. The latter manage to free his arm from Aizawa's cloth.
"Destructive kill! Obliteration type!"
With only his one arm, Akaza unleashes barrages of powerful shockwaves with immense speed, blasting every hero that tries to come towards us.
"You brat! I'm going to end you now!" Akaza shouted as he attempt to hit me again.
I grab his wrist and stops the attack before it reaches me. I move my Nichirin blade even further. Before he could move, he was stopped by the teary-eyed spirit of his human self's deceased fiancé, telling him to stop.
"Please.. You've done enough Hakuji.. Come back to us.."
"That's enough Akaza! Don't serve that Muzan and return to the person you deeply care!" I yelled out to him. "She's waiting for you!!!"
Memories start to flow through him consciously. Slowly recovering his memories, a loyal son, a protective student, and a faithful lover. This allow me finally severed his head again.
"Thank you... Y/n.."
His eyes stared at me before he smile with gratitude while disintegrating along with the body, leaving only Giyu's and Rengoku's sword hilts.
As I felt the sun, my knees gave out, I felt myself losing consciousness and slumps onto my sword out of fatigue.
"I did it... Rengoku-san.. And everyone else... I defeated an upper rank demon..." I muttered, feeling myself fainting from exhaustion and pain.
My vision start to blurr, using my last strength to grab my ancestor's sword hilt until I felt my body throbbed. I saw my homeroom teacher look bewildered at me.
"S.. Sensei..! U-Use.. your.. Quirk... E-Erase.. It..!"
Aizawa rushes, activating his Quirk on me. My appearance reverted instantly, Aizawa tightly clasp me into his arms before I collapse. "Just hang on Tomioka. Stay with me. You're going to be alright."
"..I'm.. exhausted..."
"Tomioka! Just hang on!" I hear Aizawa's voice slowly fades away.
"Stay awake Y/n!" Edgeshot's voice called out.
"Young Tomioka!"
"Hurry call the ambulance!"
"Take this boy to the hospital immediately!"
"Stay here! Don't worry, we'll take care of him!"
"Tomioka! Stay strong!"
"Y/n! Please! Don't die! Y/n!"
"Hey! Don't you dare die!"
Rengoku stood before Y/n who was being hugged by Aizawa, staring at him with a proud smile, he crouched down, caressing his face.
"You did a wonderful job! Y/n, my boy! We're proud of you!"
---
After the Camino incident, the Police Force investigators hold a meeting regarding the current state of their pursuit of the League of villains and the demon encounter.
"So those culprits who killed dozens of heroes were demons."
"Man-eating demons."
"We can't just lock those things in Tartarus like other villains."
"We've been hunting those things and not a single one we succeeded on defeating. Thanks to that UA student, one has finally taken down."
"I'm certain that boy who defeated the demon on Camino, was the son of Tomioka F/n. The swordsman from 12 years ago who also fought one of those as well."
"Perhaps Tomioka Y/n might be able to defeat the other demons."
"Agreed. Have you seen how he fought that Uppermoon? I've never seen a kid like him who stood a chance against strong and dangerous opponent. He's like a gifted one. Not to mention, he's alive."
The elderly woman lowered her head down. "Can we really trust that boy to take care of this demons?"
---
One week later, All Might, Gran Torino and Tsukauchi entered the room. There lays an unconscious Y/n, heavily bandaged and hooked up to multiple IVs. Kanzaburo rest next to the swordsman head, nudging his head.
Aizawa and Recovery girl were right next to the bed, they both turn to see the three men who entered the room.
"Aizawa. Recovery girl. How's Young Tomioka?" All Might asked.
"He's alive. I already healed the remaining wounds." Recovery girl respond before she stare at Y/n.
"What about his solar plexus?"
"I don't know how. But his solar plexus were already healed before we could." The doctor stated as he watched his student lay there unresponsive to the world around him.
"Have you contacted the kid's parents?" Gran Torino asked Aizawa.
"I'm not getting a respond from his mother."
Before they could speak, the crow beside Y/n let out a caw.
"Y/n's mother...and father.... deceased... Both were... killed by demons.." Kanzaburo stated, causing the people inside the room surprised.
"Tomioka F/n... died 12 years ago... after the encounter with an Upper rank demon... Tomioka M/n... attacked by another upper rank... before his training camp..."
The UA teachers were completely speechless after hearing the crow's statement.
"Young Tomioka's family are..."
"Oh poor child." Recovery girls says, approached Y/n and gently stroke his head.
"Where did that crow come from?"
"It's Tomioka's crow. His classmate, Koda brought him here." The doctor respond.
The young swordsman began to stir and uttered. "..G..Giyu..-san... R.. Re.. Ren
..gok...u-san.." Kanzaburo glance at the young swordsman and cawed. Y/n slowly opened his heavy eyes, "Kanzaburo..?" he blinked his eyes before he slowly scan around.
"He's awake. Tomioka's awake." Aizawa and All Might rushes beside him.
"Young Tomioka, ah, I'm so glad that you're awake." All Might sighed in relief. Kanzaburo nuzzled to his head. Y/n raised his arm and holds on his kasugai crow.
Y/n push himself up, looked down at where the Uppermoon three impaled him, it was covered with bandage.
"Your solar plexus were already healed before we could even treat you. We think that, it's probably your Quirk." The doctor stated. Y/n stiffened and looked away.
"But, Young Tomioka doesn't have a Quirk." All Might says. Aizawa gaze at his student who was avoiding them.
"We did some scanning and turns out, we found that he had a Quirk."
"He does. After the fight, he asked me to use my Quirk on him.
Your appearance is different back there, it's almost like a demon."
"... Yes." Y/n admitted.
"A Quirk that gives me inhuman strength, regeneration, speed and endurance. Similar to those demons."
"Why didn't you use it from the start?"
"It's the drawback.. I'll become one of those muderous demons if I use my Quirk for more than 30 minutes.." Y/n answered and not long after, he suddenly remembered..
"..I didn't get burned from the sun when I was in my demon form..?"
---
"Akaza's presences is gone. He has fallen again. It's not surprising that he still have humanity in him. How exceedingly weak. But.."
An unknown figure with a flesh sword stood there, with the dead bodies of heroes and some villains.
"That person's Quirk, similar to us. But it can withstand the sun.. And it's hiding tremendous power..."
-
"Eh? Could it be that Akaza-dono is dead? He lost again. Oh, how sad! He was my best friend!" The rainbow eyed Uppermoon sobbed dramatically.
"But I felt this strange sensation near Akaza. It's like the person who beat Akaza has a demon aura."
"Gracious founder. Your followers have arrived."
"Oh? That's good! Come on! Come on! Bring them in!" The demon licked his lips.
-
Meanwhile, a massive flesh cocoon that was completely hidden, it reacted aggresively causing tremor around it.
'A being who's born with a Demon abilities and who can withstand the sun..!! That Akaza did an amazing job finding him. Once I finally recovered, I will find and absorb that boy! I can finally become indestructable!'
---
Finally done with this part!
Author: You better stay away from mah boi Y/n, Muzan.
Y/n: -_-