prologue:the end is just the beginning
"15 minutes to dawn!! 15 minutes to dawn left!!!"
The raven's altered words produced a great feeling of jubilation among the remaining hunters, who rose against wounds and exhaustion, with only the strength of will, forged from years of training to death, years of forging combat styles designed to kill their enemies, years of fighting horrors beyond most people's imagination. No matter the pain and suffering of their bodies, they had a mission, an oath they made to that fallen leader who cared for them and inspired them to fight against this primal evil, they had a desire for revenge against their fallen relatives, friends and comrades, they had a duty as swordsmen that they had, no... they wanted to finally fulfill.
Entire centuries of triumphs and defeats, of rescues and losses, of struggle and sacrifice. Entire centuries led them to this moment. It was now or never and that was why they were not going to rest until he gave his last breath during the dawn.
"U-uggg, I can barely lift my arms" Muzan Kibutsuji, the father and creator of the demons, watched with pure hatred as the user of the lightning and beast breath were getting up with great difficulty "stupid demon slayers!! Aggg!!" One of his legs began to fail, making him fall to his knees" They are just damn pests, no matter how much I crush them, they always keep getting up because they can't die at once!!??"
2 demon slayers, Zenitsu Agatsuma and Inosuke Hashibira launched themselves at full speed against the demon king to attack with their respective breaths, unfortunately, both demon slayers didn't have the crimson sword, so their attacks produced nothing more than superficial cuts. Muzan took advantage of this to knock Zenitsu away with a blow, who could barely move due to the pain in his muscles, a product of the electricity. Inosuke continued attacking with several of his forms, in order to weaken his opponent, but a shock wave pushed him away from Muzan leaving him defenseless to an attack, something he would not waste to finish off the mountain king.
"SUN BREATHING: BURNING BONES, SUMMER SUN!!". Tanjirou Kamado, a swordsman with Hanafuda earrings and crimson hair like the sun itself, stood between the two combatants, managing to save his friend by cutting off the Demon King's tentacles and thanks to the crimson sword and the divine properties of his breathing technique, he managed to land several critical hits that made it difficult for Kibutsuji to regenerate.
But a small wound, which opened during the execution of one of the forms, abruptly stopped the wave of attacks. Cursing, he tried to get back into combat position but it was too late. 2 sharp tentacles headed towards him at full speed, but Inosuke and Zenitsu's quick reflexes cut off Muzan's limbs before they reached Tanjiro.
"Gompanchiro!!Let's use our techniques to attack him!!
"He's right, your sun breathing can open an opening in his defense to damage him"
Once recovered, the 3 combined their techniques to form a combined attack that cut several areas of Muzan's body, damaging 2 of his hearts. However, fatigue hit the swordsmen again"
"Quickly!!We must protect Tanjirou!!" In a desperate attempt to save Tanjirou, Zenitsu and Inosuke used their own bodies as a shield, receiving 2 powerful stabs that sent them through several remains of destroyed buildings.
"NO!!!" Tanjirou saw in horror thanks to the transparent world how the stingers pierced several important organs of his friends, while they crashed brutally against the floor"SUN HALO DRAGON HEAD DANCE!! FAKE RAINBOW!! SUNFLOWER THRUST!!!" In a fit of anger Tanjirou resumed his wave of attacks, damaging and destroying the body of the weakened demon king, managing to trap him between his sword and a half-destroyed wall, but leaving him defenseless against any attack from Muzan.
"1 minute left until dawn!! There is 1 minute left until dawn!!"
"Damn it!! Why can't you die at once??!!"In an attempt to break free, Muzan used his arms to kill the user of the sun's breathing, being saved by Mitsuri Kanroji, the hashira of love Sanemi Shinazugawa, the hashira of wind.
"WE WILL NOT ALLOW YOU TO LIVE ANYMORE,YOU FUCKNG BASTARD!!"
"Tanjirou!! You can do it!!you can resist!!"
The pink-haired girl tore off Muzan's left limb with her brutal force, while the white-haired man cut off the right one, but unexpectedly, both arms automatically attacked the pillars, cutting off the arm and tearing the left side of Mitsuri's torso, while several of Sanemi's chest bones were brutally torn out, followed by a shockwave that violently pushed the 2 attackers. Tanjirou helplessly watched as his companions were massacred while he continued with all his strength to keep the sword on Muzan's chest while trying to reactivate the crimson sword of his Nichirin.
"KANROJI!!"
"SHINAZUGAWA!!"
"THE DAWN HAS COME!! THE DAWN HAS COME!!"
"WE ALREADY GOT IT, TANJIROU!! KEEP IT TRAPPED!!"
"NOOO!!!! I DON'T INTEND TO DIE HERE!!" With his last strength, Muzan transforms his head into a pair of giant jaws ready to devour Tanjirou.
"I won't allow you to kill Kamado!!Tomioka!!help him!!now!!"
Iguro Obanai, the serpent hashira,in a desperate act to save him, stands between them, receiving a strong bite on his chest and neck, destroying all his bones and throwing himself against the rubble, near the body of the pillar of love. Once free, he tries to repeat the attack but a metal ball from Gyomei Himejima, the rock pillar, destroys Muzan's head, while Giyu Tomioka, the water pillar, helps his apprentice by wrapping his hands in the redhead's and together they activate the crimson sword again, causing internal burns in Muzan that increased the speed of the burns produced by sunlight.
"We've lost Obanai!!"
"The others have probably fallen!! We are the only ones left!! Tomioka, you must protect Tanjirou at all costs!! I will destroy any attack that comes!!"
"AAAAAHHHH NO, NO THIS CAN'T END LIKE THIS!!!"Muzan's body began to mutate and deform into a giant mass of flesh, which was absorbing the red-haired swordsman. Tomioka desperately tried to separate him while Gyomei lunged to attack the giant mass, but several tentacles and thorns stuck into the Hashira's abdomen, throwing him to the ground.
"Whatever happens, don't separate your nichirin from Muzan!!!I will take care of protecting you two!!"
Another pair of tentacles tried to impale Tanjirou, but Tomioka used his body as a shield, receiving the thorns, which tore his back and threw them against one of the vehicles on the street. Tanjirou could only watch with anger, helplessness and sadness as all his friends and companions were brutally sacrificed to protect him, while he maintained the grip of his sword on Muzan's body. The walls of flesh took the body of the user of the solar breath and slowly absorbed it.Tanjirou fought with all his strength to keep his mind awake while the darkness was claiming his vision.
"NOO!!!TANJIROU!!!"
The last thing he saw before being absorbed was how Kanao Tsuyuri, the apprentice of the deceased Insect Pillar and one of his greatest friends, was cut in half.
Tanjirou could see nothing but darkness, he could barely stay standing due to the wear and tear of the battle, but with the help of total concentration breathing and reactivating his mark, he activated solar flames that illuminated a cavity made of flesh and organs. As if it were a signal,Tanjirou began to cut and destroy everything in his path, performing the sun breathing postures over and over again as he destroyed Muzan's body from the inside. He could smell pain and burnt flesh as he advanced but an unknown smell caught his attention, and he went through the huge walls of flesh to find a room, similar to a ribcage, where Muzan Kibutsuji was, gasping in pain with more than half of his body burned, barely standing and without his 2 arms, in the center of a circle of blood with many unknown symbols.
Seeing him, Tanjirou launched himself with fury, seeing that he only had a heart and brain intact. The demon simply used the surrounding walls to try to trap him or keep him away from him. "Shuten-dōji !! Ancient master and lord of the demons !! My time to burn has come !!!"
Tanjirou destroyed and cut each and every one of the walls and walls of flesh that didn't stop appearing, luckily, the last remains began to be weaker and with clear burn marks, allowing them to advance easilier. The demon used his arms to upset Tanjirou but he was able to cut off the burned arm and enter the circle ready to give him the final stabs.Muzan used his last arm to catch the sword wrapped in crimson flames, while continuing with difficulty his mysterious chant "But I invoke the ancient power that one day I will return !! Reborn from the dead !!! To walk the earth again !!"
Tanjirou, seeing how the circle began to emit a strange violet glow, increased his strength beyond his limits to try to complete his attack as soon as possible, managing to pierce and burn the last brain of Muzan, who only screamed in pain and fear, seeing how only one heart was left intact. "I INVOKE THE ANCIENT POWER TO END MY ENEMIES !! TO REVIVE AND DEFEAT DEATH !!"
Tanjiro's Nichirin had already touched Muzan's heart when the purple light enveloped both, causing a small shockwave that separated Tanjiro from Muzan, while listening to the screams of pain of the demon king. The redhead could see nothing but a blinding purple light, however, he could still perceive Muzan's scent, which he noticed was slowly fading away, as if he were moving away.
"NO!! I WON'T LET YOU ESCAPE!!I WON'T LET MY FRIENDS' SACRIFICE BE IN VAIN!!SUN BREATHING:TWELFTH FORM!!FLAME DANCE!!"with only the guidance of his sense of smell and closing his eyes to avoid any dizziness from the strange light. Tanjirou lunged at Muzan, realizing that he managed to hit a series of cuts against an adult body, while hearing loud screams of pain.
Tanjirou could only smile tiredly as he fell heavily against the ground. His body was in pain to levels beyond his imagination, he barely had the energy to breathe or stay awake, but he couldn't help but feel a great sense of joy. He had finally killed Muzan Kibutsuji, his family, friends and masters could be avenged, he can finally live in peace with Nezuko.
"We did it Rengoku-san… we kept our hearts burning…we won." With only his willpower Tanjirou bowed his head to watch Muzan's remains turn into more than dust.
It's a shame what he saw,left him completely extinguished the flame in his heart and froze the deepest part of his soul.
Instead of the burned and bloody remains of Muzan Kibutsuji, he only saw a strange, muscular creature with pink skin, whose limbs were cleanly severed along with what seemed to be its head. Remnants of crimson flames clung to the remains of flesh and were happily consuming them.
"N-no, no, no, no,please t-this can't be, it can't be real..." Tanjirou whispered several incoherent things while his tears slowly accumulated in his eyes, before finally falling unconscious due to exhaustion and injuries.
Seconds later, several police patrols came across a scene straight out of a horror movie. The officers were doing everything they could not to vomit while they moved all the civilians away from the place and helped 2 people they saw firsthand. The blonde woman in the white and red suit could only stand still in shock, unable to process what she had seen, before suddenly fainting.
Her companion, a strong red-haired man with orange flames all over his body, could only watch the scene in shock. It was not only the speed and precision of the boy's attacks that impressed him, but also the crimson flames emanating from the Katana, it was something he had never even imagined.
Captivated, he approached the villain's corpse and brought his hand closer to the crimson flames. First he tried to touch it but when he brought his hand closer, a strong pain covered his palm and burned his glove, revealing a strong burn all over his hand. With his other hand, he summoned some orange flames that he brought closer to the crimson flames, but before coming into contact, the orange flames went out, or rather, they were extinguished by the crimson flames, which tried to pounce on them.The man was able to pull his hand away in time, but that did not prevent another painful burn that made him grunt in pain.
He changed his attention to the person responsible for this.He was a seriously injured 15 or 16 year old boy, who was being treated with some care by the doctors, since the Katana that was in his hand was still enveloped in the same crimson flames, but they were slowly dying out,near of his owner,but they don't burn him.
"That meant those flames were created by the boy"
He didn't know him at all, and he had already made a better impression than the vast majority of people he had ever met, including his own family. The boy was strong in his own right, his physical abilities, at first glance, would put most of the top heroes to shame. And if that wasn't enough, he possessed an impressive skill with fire…if that could be called that. Those flames were far above from his most powerful flares and he was sure that his son's wouldn't be a match for him either. It was like touching the sun itself, with all the warmth and pain that meant.
Endeavour would be lying if he said he wasn't jealous of him.
That could add up to 2 possible Quirks, one of augmentation and one of "fire" but there were a couple of things that made him suspect a third, the boy's wounds should have killed any adult, so it could indicate a third Quirk of regeneration or resistance.
No one in history has been born with 3 Quirks.
The hero noticed that the boy was being transported to an ambulance so he quickly headed inside to accompany them.
A savage smile appeared.
"You better not die now kid,you've caught my attention".
After all, someone will have to pay the medical bill and the boy has definitely piqued his curiosity.
N/A:Well, to be honest, I find this project veeeery interesting.I was debating whether to do it now or not, so I decided to just write the prologue. I have a main story that I want to finish first, so I don't know exactly when I will update this(This doesn't mean I have to finish my previous story to start this one, but my priority is somewhere else).Another reason is that I don't know much about BNH. I've seen summaries of the seasons and some pages of the mangas, but I don't have time to watch the anime either. However, I like the concept, and in fact, it is one of the best anime franchises to do crossovers, that's why I was VERY surprised that there weren't as many as I expected, especially with anime that, in my opinion, pair perfectly with each other like JJK, KNY or OPM. In any case, when I start something, I finish it YES OR YES, no matter how long it takes me, although if someone could help me with the characters (personality, background, powers) of BNH I would greatly appreciate it. To make some rules clear:
Breathings are real, I never liked that all breathings(except sun) are just an illusion of the reader and if I write something about kimetsu, this rule is sacred to me.
Yoriichi didn't invent all the forms (keep this in mind for later).
Tanjirou didn't lose his arm or leg in the battle against Muzan, just so no one would mention anything about it.
Tanjiro is the version of the end of the manga. This may be obvious but the abilities of the characters of kimetsu are often underestimated with other anime, so keep in mind the years of experience killing demons, the training designed to KILL beings and the battles he had against upper moons, in addition to the mark (which he can activate and deactivate), with all his abilities.
Some of Tanjirou's abilities are not mastered yet (this doesn't mean that he will achieve a Quirk, no!!he will be a quikless, his development will be based on sun breathing and the mark).
Tanjirou will not fully follow the ideals of the heroes. Remember that despite Tanjiro's pure nature, he only wanted to kill Muzan to save his sister and has prioritized Nezuko's well-being on several occasions before saving lives, so do not expect so much that he has that heroic or compassionate personality like Izuku (a hero is not the same that a demon slayer) but he will want to help whoever needs it.
The tagged characters will not be the only protagonists, but there is no space, so I will only put those that will be from the beginning of the plot, but there will be more that will arrive over time.
This is just the beginning, I have in mind 3 versions of the story, very different from each other (or well, now they would be 2 because the prologue rules one out) and depending on the characters the story will have one plot or another. In any case, I hope you enjoyed and any ideas or constructive criticism will always be welcome.
Thanks for reading :)