500 years passed to the taisho era,
Somewhere in a mountatin, near a village called Okutama. A small little house where a boy named Kamado Tanjiro with Red Hair, red Eyes with a Ponytail, a scar on his left side of his forehead in a darker colour and wearing a green checkerd haori Exiting a small shack for making charcoal, he is now wearing a basket with charcoal being carried.
''Tanjiro? you're here.'' replied kie, Tanjiro's mother walks to him, rubbing the charoal stain of his cheek ''there, off to sell charcoal now?''
''It's new year, so i got to go and bring the village what they need.'' replied tanjiro
''oni-chan, you're going? Take us with you." says hanako, who she rushed to tanjiro.''Not a chance, you can't run as fast as he can, " says kie, "nor can he carry you along the way." "I'd love to take you with me," replied tanjiro with hanako, smiling in joy, "but you'll have to stay here." she ends up getting a little mad by making poofy cheeks. Slowly, tanjiro convincing his little siblings to stay, him waving good by while he's off until. "oni-chan." tanjiro turns around to see his sister nezuko carrying little rokuta sleeping in her left arm and carrying a sword from her right hand. "You off to the village without protection?"
tanjiro realises it and takes the sword, and places it around his waist. "Oh, thanks, Nezuko."
"Everyone has been clinging into you since father's passing." says Nezuko with her now carrying rokuta from both her arms.
"I know, a lot of responsibility to take care of," says tanjiro.
Tanjiro now leaves waving his family goodbye and makes his way to the village and sold charcoal tanjiro everyone. Night time has arrived as tanjiro is off home until "hey, Kamado!" A man inside a shack, calling him from the window "your off to the mountain? you can stay here for the night. it's too dangerous out here."
"it's okay, I have my keen nose and my sword." says tanjiro only for the man to not listen and convinced tanjiro to stay. "it's way too dangerous. Come and stay here."
"But I-" tanjiro got cut off with the man saying, "Im not kidding. Come in before a demon shows up."
After some amount of convincing, tanjiro ended up staying with him. He ends lying down a futon while the man says, "Since long ago, man eating demons feasts on human at night time so it's dangerous to go out."
"Can they enter inside houses?" asked tanjiro, and the man replied, "They can."
"So what's stopping them from eating us?" tanjiro asked while the man replied,"Because we have demon slayers, roaming around at night to slay them in order to prevent humans from dying as best as possible."
Tanjiro faces to his sword lying next to him on a floor, next to his futon. 'My father told me a lot about demons and demon slayers. He told me that this sword was gifted to our family by a demon slayer long ago, and here and now, 500 years passed, and it's still here. He ended up training me how to fight and survive, weilding this sword to protect us. So far, I have only heard about demons and hunters from my father and my grandmother as if it's urban legend. I might wanna go through our family history to see if i could find out more. This man who took me in to stay, the kind of scent he gives as if he's serious. He lost his family long ago, and he seems alone. I could see his reason in taking me in for the night'
Early morning has arrived as tanjiro is off home now. Soon after he arrives home, the first thing he smells is blood. Tanjiro rushed to where the scent was coming from, and it led to his house, where his family got slaughtered and blood stained all over the walls. Tanjiro is left traumatised, and heart shattered.
Nezuko is still warm but unconscious, who she is now being carried by tanjiro from his back along the way. 'How did this happen? it couldn't be a bear at all. what could have done this? don't worry, Nezuko, i won't let you die. I promise.' Nezuko being carried along the way, her fingers begin twitching, her fangs growing, and ends up pulling tanjiro off, making them both fall off a cliff only to be saved by snow, Tanjiro then gets up looking around where his sister landed only to find her kneeling down in front of a tree. Tanjiro rushing to Nezuko. "Nezuko, don't worry, im here -"
"No oni-chan!!!! please stay away. Please!!!!" Nezuko, as she revealed herself as a demon and forcing her brother to stay away, Nezuko seems to be shaking as if her body is being pulled by puppet strings. "Please Stay Awayyy!!!" Yelling Nezuko, who she's crying and screaming in pain. Tanjiro took a step back in shock
'Nezuko? a demon? no, it's impossible she was a human before. Nor was it her doing. Someone did this her, even her scent changed'
while someone with a blue ocean sword and a mismatched hoari on his way to deal with the demon
"Nezuko, fight it off, don't be a demon!!!" Yelling Tanjiro as Nezuko on her knees and scratching a tree as the man Arrived at the scene he witness Nezuko as a demon and saw as she yelled, "oni-chan, please take your sword and kill me now!!!"
the man opened his eyes wider and backed off from interrupting and is now far away, and seeing this "kill me oni-chan, please, i don't wanna be like this."
tanjiro in tears, and saying "Nezuko please, i-"
"PLEASE!!!!" Tanjiro took his sword out and pointed at his sister. "Do it oni-chan, i can't control my mind and body, Please!!!!"
The man who was observing this scene and in a deeper thought, 'What's happening? this girl got turned into a demon, and she's begging to die Instead of attacking him? is her human soul still intact? and this boy has a nichirin blade? they must be siblings, and the boy is not listening to her. Is he going to do it?'
"Do it oni-chan!! I don't wanna hurt you, nor anyone...ahhhhhhh! " yelled Nezuko, who she was fighting back from the strings she's feeling only for her to end up burning in hot steam, making her scream in agony. "Ehhhhhhhh!!!!"
"Nezuko!!!!!" Yelling tanjiro as for the man who's observing got more confused 'what is this I'm witnessing? not only is she refusing to attack her brother but she's demanding her self to be killed, even sunlight isn't even around here and yet she's burning like steam? Unless...' The man's eyes opened Wider in shock to witness something unexpected. Nezuko screamed in agony, holding her head while burning in steam, sweating as her claws vanished. Her eyes, which previously got changed, reverted back to normal human eyes, and her fangs vanished. Sooner enough, Nezuko is no longer shaking as tanjiro noticed that her scent changed as well, and now it's back to normal. "Nezuko? your human again?"
"I did it, i got out!!! I am human again!!" says Nezuko as she started crying in relief with tanjiro dropping his sword down and rushed to Nezuko, hugging her as he covered her up with a blue cloth. both siblings crying as Nezuko says "oni-chan!!!! im sorry!!"
"Nezuko, what happened?" asked tanjiro
"Demon attack, i couldn't even save rokuta either!!!" replied Nezuko as she cried out loud. both siblings cried for a while, only for them to see the man with his mismatched hoari. Sheathing his sword on his waist and in a look of shock as he walked to them slowly, he kneels down to them as he asked, "Im so sorry for your loss, Are you okay young lady?"
"i feel sick right now, but I'll manage" replied Nezuko who her eyes are red from crying
"Who are you?" asked tanjiro
"I'm a demon slayer. My job is to slay demons." answered the slayer
"but Nezuko is not a demon anymore. my family got attacked, and this is what happened. There was another scent, a very different scent."
"It's simple. A demon's blood is exposed to a human's wound, which is how man eating demons multiply, and as for your sister, i can confirm that she's no longer a demon. Her presence as a demon has vanished as far as i can sense it now. But still, a human who got turned into a demon and ends up reverting back right away? that never happened. How did you do that?"
"i don't know, all i did was hold myself back from attacking my brother." replied Nezuko "i see, and seeing you demanding your own death to happen for the great or good, that's impressive. And as for you, young boy." The slayer stands up as he picks up tanjiro's sword, which he dropped and asked."This sword you have is a sword of a demon slayer. Where did you come upon this?"
"This sword has been in our family for generations since the sengoku era." replied tanjiro, who he and nezuko stood up.
That man raises his eyebrow in a curious expression but replies, "...I understand." the slayer returned it to tanjiro, which he put on his waist. "So what will you do now?"
"Since we have nowhere else to go, we might as well join the corps. Nezuko, are you up for this?" asked tanjiro
"If it means making sure this doesn't happen to anyone else, then im coming." replied Nezuko, who she seemed furious for what happened, and the slayer who he crossed his arms and saying "So you wish to become demon slayers to protect humanity? correct?"
"Yes, i do," replied both siblings, and the slayer said, "Very Well then, make your way to mount sagiri, there you will find an old man with a tengu mask name urokudaki sekonji. Let him know that Tomioka Giyu sent you 2. Be safe on your journey." says giyu as he vanished
Both siblings buried their family, praying, and after praying, they both started crying again while nezuko hugged tanjiro. As moments while nezuko is almost done cleaning the house, tanjiro begins searching around everything from the sengoku era. Found some books relevant to demon slayers itself, the life of yoriichi tsugikuni, and everything he knew about the demon slayer corps from that era. 'tsugikuni yoriichi, so that's the name of the original weilder.' Tanjiro then yells, "Nezuko, we will be leaving tomorrow!! So pack anything you want or need!!"
"Im already on it!" Yelling Nezuko, who she's far away. and tanjiro begins packing everything about his family and tsugikuni yoriichi from the sengoku era. 'My grandmother told me that my father, my grandfather, and the rest of my family throughout 500 years seemed to have a resentment towards the demon slayer corps and having pitiful thoughts to their leaders for certain reasons. Whatever it is, this track record and my life as a possible demon slayer would give me the answers.' The Kamado siblings finished packing and left their house, making one last look to their home, and then they all left on their way to their journey.
To be continued.
taisho era secret, Tanjiro received sword training from his father when he was 11 years old, and he ended up receiving a dark colour scar around the left side of his forehead during his training schedule. (same scar like in canon after final selection)