The son of the demon king

So close yet so far

Sorry for the long wait

Tanjiro looked through a microscope, he saw demon blood changed into human blood. He waited for 2 minutes and to his absolute joy, it worked

"Yes! Yes! I-I did!"

Tanjiro had a big smile across his face, he had worked on hantengu's blood samples for two months straight but it all payed off as the demonification revert back to human

Though it would take good month for him to make more as it took him trials and errors to eradicate the demonifications but it was all worth it, tanjiro got on his knees and cried tears of joy

"It.....is done.........at last"

Tanjiro felt so happy, so proud that he finally made a cure. Now he came to a realization, what does he do now? Yes he had a plan to cure himself but he didn't think of anything else other then curing himself

He had to solution to cure not only himself but other demons and........his family, that was tough thought. To come back to his family and reveal he was alive and make them take the cure

Tanjiro knew his family would never take the cure but he hoped he could convince them to take it, sighing tanjiro decided to put those thoughts aside for now and get busy making more

Demon slayer Corp HQ

Slowly opening his eyes Zenitsu stared at the ceiling, he groaned before sitting up straight but hissing in pain, he remembered what happened on his last mission almost getting killed by upper moon 4

"Ouch! My ribs and arms hurt!"

Zenitsu heard the door slide opened and turned his head to see Shinobu walk inside

"Oh! Zenitsu you finally woke up!"
"How long have I've been out?"
"About two days"
"Two days? Damn I almost got killed!"
"Well am glad your finally awake now, Inosuke had woken up before you a few hours ago and is under going recovery"
"Oh ok, I'll just rest up until I can get back to full health"

Shinobu nodded and left the room to her personal room, on her walk to her room she remembered the last mission and the unique demon she saw, those red eyes with a slit and black clothing and haori made him mysterious

But for Shinobu she couldn't get this feeling of a connection to him, it is like she knew this person before

"S-SHINOBU!"

Those words echoed in her head, how did that demon know her name and why did it help her? That she will never know until the final battle. Shinobu had already given her report and it was strange but true

Now the demon slayer Corp has sent out news of the mysterious figure and given instructions to bring him to HQ willingly or not, this person was the same guy to have defeat several of upper moons on his own

They needed him

Infinity fortress

Muzan looked at map, it was detailed layout of the demon slayer Corp HQ and it was made by tanjiro when he was still alive, muzan rubbed his eyes before standing up from his desk

He had spent days planning out area's to send some of the hashira to fight his moons, muzan was still so angry and had become depressed for a month after nothing came out with his searches for tanjiro

He had begrudgingly made a grave for tanjiro in a section of the infinity fortress with the most beautiful flowers, walls and art he had gathered for his funeral

Everyone had attended of course, mostly everyone cried or had a face of pure rage. Daki, doma and muzan were the most affected by his death with daki crying on his grave for hours and had to be taken away by her brother

Doma just weeped and had eye shadows not even caring about his self image anymore, he had gone silent and didn't bother going to his cult for days just crying and screaming in his room

Muzan had been depressed and saddened over tanjiro's death and making the grave was like finalizing his death even though many had rejected the truth

Now muzan was getting many strong demons together and his upper moons to have the fight of their lives to have revenge they all crave for, muzan was getting a suit to wear to have a 'meeting' with ubayashiki

He looked through his suits and found one he was attracted to, it black suit with a tie that made him subconsciously pick it for the tie had a black checkered pattern on it like his.......son

He chocked but stayed strong for tanjiro's shakes and picked the suit, he held the tie for few minutes until he sighed

"Soon.....me and my family will have our revenge"

Muzan ready his suit until his meeting with an old family member.......

With tanjiro

It was currently night now, tanjiro had stayed up making about 40 antidotes to cure demons, he placed those 40 in a lock safe under the house and covering his track

Those 40 antidotes would be as a fail safe if he ever needed it just in case, he had the antidote formula inside the ceiling and was planning on making more until dawn

But tanjiro wanted to train even more but had to make more antidotes, he had been seeing demons disappeared and the demon slayers all start gathering

Tanjiro was getting suspicious about this, he was thinking that end was nearing so he decided to go out and gather up information and test out the antidote on a demon

He put on his mask and jumped out the window, taking two antidotes to test out. Tanjiro ran through the woods to a small village nearby that had some demons nearby

Tanjiro decided to be stealthy and hide up in the trees, he jumped from tree to tree until reaching the village seeing a demon crawl on his feet's and sniffing the air for potential food

Tanjiro held the antidote in his hands as he jumped off the tree and held the demon down as it screech, tanjiro brought the needle down and injected it into the demon

The demon wailed as it thrashed underneath tanjiro's arms and he immediately saw progress seeing its black eyes turn back to a humans then its horn slowly but surely grow small

Tanjiro stared in amazement, it worked......it worked! Tanjiro would jump for joy but immediately he sensed a presence and immediately jumped out of the way of a sword thrust

Tanjiro held the demon he cured but was agitated by the sudden attack, he looked towards the attacker and to his shock it was none other then Shinobu his crush

"There you are! The Corp has been looking all over for you!~"

Tanjiro remained silent as he ran away with the demon over his shoulder, he ran so fast that he was blur to everyone else but Shinobu had trained on her speed so it was easy for her to catch up with him

Tanjiro could hear her footsteps right behind him and protected the cured demon from ruining his first test subject

"Hay! I just wanted to talk!~"

Tanjiro gritted his teeth before inhaling a large amount of air and shoot forward to fast for even Shinobu to catch him let alone see him, tanjiro ran through the forest and towards his family home

He placed the demon down as he saw it groaned and sweated from the curing process, tanjiro noticed the demon losing small features of its demonic appearance, tanjiro stared in awe

"It's working......though at a slow pace"

Tanjiro noted before he brought the demon into his house, he tied the cured demon up and writing down the effects of the antidote, tanjiro closed his journey before a realization hit him

"The demon slayer Corp are after me......"

Tanjiro beaked over his shoulder to see the demon sleeping but groaning in slight pain, tanjiro immediately started working in a 'special' antidote for his father knowing full well his control over his biologically

Tanjiro worked from dead of night to make the antidotes

The end of chapter 21

Sorry if it was short but the next ones will probably be the final chapters for this story so get hype!