The new demon king (Completed)

My old friend

Yushiro, a demon, one who fights against Tanjiro, the new demon king. And an old friend of the Kamado, he assists the demon slayers and has a weapon that could hopefully work on Tanjiro, but whether it will work or not they have to try. Its better than letting him create demons and kill innocents, they still have time before he makes it so his demons can walk under the sun. 

He  falls through the floor and soon finds himself in an odd room, the room seemed somewhat normal, but at the other end of the room, he sees a katana in its sheathe hanging on the wall. The hilt, the handle, he knows who's katana this belonged to. just as he was going to approach and grab it. He felt a presence behind him. 

"I hope you weren't going to take what is mine, Yushiro..." The presence behind him said

He began shaking, he knew who this voiced belonged to, but calmed himself down "Tanjiro..." Was all he saaid as Tanjiro walks around him and towards his katana. He still wore the same green and black checkered haori with a black Kimono underneath.  He also had his long crimson hair tied to a high ponytail. (Because I like it!)

"Tanjiro, why? Why did you become like this?" Yushiro pleaded but Tanjiro just turned around 

"Yushiro..." Tanjiro began "I am sorry, but, I am not strong enough. I cannot  fight my demon side, nor muzan's cells... There is still a way to kill me I hope." 

He looks him in the eye and Yushiro was feeling a bit nervous "I've injected myself with a powerful drug, it should do the same to me as it did with Muzan, but when I am not sure."

Yushiro looks at the injection on his hand and approaches him "This should help them, the demon slayers to fight and defeat you."

Yushiro raises his hand and was going to inject Tanjiro but he suddenly grabs his wrist, stopping him. "Tanjiro??" Yushiro questions but he sees him shaking. 

"I'm sorry Yushiro, but I cannot fight it anymore..." He says before his demonic self takes over and punches Yushiro all the way to the back of the wall, leaving a crack on the wall. 

Yushiro tries to get up, but it was really painful, he soon notices the drug was missing and sees Tanjiro holding it. Before crushing, destroying the drug. He approaches Yushiro, but just then, he feels someone approaching the room fast. He knows who it is, its been too long after all. 

"Dance of the fire god, Beneficent Radiance" The user spirals into the air and delivers a powerful slash that surrounds the enemy. 

He stops in his tracks as he sacrificed his arms to protect his neck, as his arms healed in a blink of an eye. He stares at the user, and knows this breath all too well. "Nezuko... Its been too long" 

Nezuko stands up, and grips her blade. It seemed as if she cried, but it didn't matter now, she points her blade at Tanjiro and yells "YOU ARE NOT THE SAME BROTHER I KNEW!" Before dashing forward.

"Dance of the fire god, Flame Dance!" A two-combo strike which starts with a vertical slash and then a horizontal one right after. 

Tanjiro swiftly draws out a tentacle and jumps back, with an attempt to parry the attack away, only resulting his tentacle being cut off. He makes it retreat before looking back at Nezuko. "This is for Giyuu and Shinobu!" Nezuko muttered. But Tanjiro heard it, "So you've gotten the reports... Pity indeed. And here I wanted to see Giyuu, his expression would've been priceless"

-Earlier before Nezuko arrived- 

She was separated from Muichiro and Uzui sadly, due to the need to cover more ground of the fortress, and that was when a messenger crow arrived and gave its report.

"CAW CAW! Upppermoon 1 has fallen! At the cost of The water Hashira Tomioka Giyuu ad The insect hashira Kocho  Shinobu!" The crow announced before flying  off. 

Her eyes widen and stops in her tracks, she looks down onto the floor and tears began to spill out of her eyes. She falls to her knees, it felt as if she lost her family all over again. She covers her face and began sobbing, mourning the loss of her hashira whom she saw as close friends.

Just then a hand grips her shoulder, she turns around and looks up to see "Kanao?"  She looked very distraught, she lost her sister once and yet she lost them again. 

"Kanao, I.... I am sorry for your loss..." Nezuko said 

But Kanao shakes her head "As much as it pains me, please, we cannot mourn now... We cannot let their deaths be in vein..." Was all she said. Her voice alone could let anyone know how distraught she was, yet, there was still confidence in her voice. 

"Come, Nezuko, let us find Tanjiro, and we can defeat him, together!" Kanao said as Nezuko stood up, wiped her tears and hugged Kanao. Kanao was not expecting it but  hugs back. 

"Your right Kanao, together!" Nezuko said, with a spark of confidence, to stop Tanjiro. 

-Now-

Nezuko stood across her former brother, once a good man with a pure heart now nothing but a cold-hearted man who enjoys the sight of killing. 

He was about to walk forward, but the sound of someone entering from the roof distracted him, he looks up, curious about the sound. And thats when they came crashing down, the roof exploded and the God of festivals and the happiest Slayer came crashing down. 

"Now that is a very flamboyant entrance, you however, is not very flamboyant!" As the dust cleared, the voice revealed to be Uzui, the sound pillar. With a fellow hashira beside him . 

"I couldn't agree more with him! What happened to you Kamado shoden?" The voice now clearly belonged to Kyojuro. 

Tanjiro looks at  them and forms a smirk on his face "Nice to see you haven't changed." He said as his eyes widen, mist begins to form around him. He swiftly parries the incoming attack with a tentacle of his. Thrusting the Hashira back, but revealing it didn't damage him, he knew who his prodigy was. 

"Muirchiro, its been too long old friend..." Tanjrio greeted as the mist cleared and it showed it truly was Muichiro. 

Just then the sound of a meniacal laughter was heard as the boar man, Insokue  came crashing through the wall on the left. Then a sudden burst of lighting appeared, he was barely fast enough to avoid him but lost his arm. Like it mattered, it just healed in a second. 

He sees Zenitsu, he looks at Tanjiro with rage, like the time he first met Zenitsu when he became the new king. The wall infront of him soon broke open revealing Gyomei, Kanae, and Obanai. 

Obanai and Kanae seemed better days, the same could be said of all the hashiras truthfully. 

"Seems as if only two people haven't arrived, Mitsuri and Kanao... Ah, their busy with Sakura. Its alright, I have faith in her. I always had faith  in my uppermoons, sad seeing them leave... Oh well..." Tanjiro said as he swiftly reached to the back of the wall and grabbed his katana where it hung. 

Placing it on his side and drawing out his blade. "Its been far too long since I've used this..." Tanjiro said as he swiftly analyzes everyones position. 

"Lets dance... Hashiras!" 

To Be Continued 

Hello my fellow readers! Sorry for taking awhile to update, school can be annoying as hell at times. But I'll try to update  as often. I'm sorry  if they act a bit OOC especially Tanjiro, but he is the new demon king.  Now the fight scene will be somewhat difficult to write due to how many characters there are, but I will try to do my best to make it look good. 

Ill be preping a voting counter here for the next story so I can prepare. The next fanficiton vote may look out of place but I can't really  resist so...

Sun breathing Tanjiro, he has been hunting down Muzan and is continuing Yoriichi's Legacy

Naruto, grandson of Madara Uchiha. 

Or: Ya guys decide! 

Alright thats all of it for the time being, Farewell!