A review from the first chapter had made me want to clear this up right now. Nezuko and Tanjiro will not have any sort of relationship other than Brother and Sister in this. This is the one rule I have for Tanjiro, so I just want to clear this up right now. There will be no incest between the two. I have standards.

Chapter 2

The Creator

"I'm sorry, I'm the what?!" Tanjiro questioned, not believing he heard this mysterious swordsman correctly.

"You are the Demon Tamer… a man who can tame Demons," Giyu repeated. "Someone of who I don't believe exists, but… if you are human then this might just be true. Tanjiro, you're the Demon Tamer."

"I am human! I have been since I was born!" Tanjiro said, clenching his fists but then found they felt different. They felt harder for some reason. He looked at his hands and yelped as he saw they were metallic. "OHMYGODWHATISHAPPENINGTOMEANDWHYAREMYARMSTURNINGINTOMETAL?!" Tanjiro questioned rapidly and scaredly.

"Believe me yet?" Giyu asked. "Apparently… that might be one of the Demon Tamer's powers, known as Haki. I don't know much… So I recommend we get you to see my trainer, who might be able to help you and your sister."

"H-How do I know this isn't a trap?!" Tanjiro questioned.

"Why would I sheath my sword and not use your confusion at your arm's as a chance to kill both you and your sister?" Giyu asked. "Because, if you could tame Demons, then we would have a safer world, and not have man eating Demons making golden corrals out of our villages."

"That's oddly specific," Tanjiro said. He looked back at his arms and they were back to normal. "Huh, I guess it stopped…"

"I'll take you to Urokodaki myself," Giyu said, right before a crow came and landed on his shoulder.

"There is a Demon in a village to the north-east!" The crow said, which made Tanjiro and Nezuko jump in surprise.

"HOLY SHIT! THAT CROW IS TALKING!" Tanjiro cried out in shock. "Just what the hell kind of things go on with you Demon slaying people?! Are we sure that crow isn't a demon?!"

"I'm sure. This is a Messenger Crow, which helps us Demon Slayers talk with each other," Giyu said. He pulled out a piece of paper and a quill before writing on the paper, before rolling it up and tying it with a string before giving it to the crow. "Take this to Sakonji Urokodaki please. And then come back to me as soon as you can." The crow took off without saying another word. Giyu looked back at Tanjiro. "Well, time to get you both changed and ready for your journey."

"Wait, you're not kidding?!" Tanjiro questioned.

"How would you explain to the village nearby about your family being massacred while you slept soundly in the village and that your sister miraculously survived?" Giyu asked back.

"True," Tanjiro replied. He looked at Nezuko. "Um… I guess we should go back home for a bit and get our stuff."

"Probably…" Nezuko said, still seeming a bit out of it.

"Is my sister going to be okay?" Tanjiro asked Giyu worriedly.

"Hell if I know. It could be because she recently became a Demon, and she still hasn't come back her senses," Giyu answered. "Only the next few days will tell."

"Right…" Tanjiro agreed, still a bit worried for Nezuko.

"Let's head to your house. I'll help bury your family," Giyu said.

"Thank you," Tanjiro said, bowing for a bit.

"I'm doing it only because I'd be bored while I wait for you two to get ready." With that, Giyu began walking away, and Tanjiro and Nezuko took off after him.

A few hours later, the trio now embarking on their journey, they had stopped at a small village to eat and prepare for the next part of their journey.

"Why do we have to walk so much?" Tanjiro questioned as they exited the small restaurant they just finished eating at, actually really tired from walking so much today.

"If you feel tired from just the morning part, you won't last long in the Demon Slayer Corps," Giyu said while looking at Tanjiro. "And consider it this way; you're beginning your extensive almost full year of training."

"WHAT THE HELL?! THAT'S HOW LONG TRAINING TAKES?!" Tanjiro exclaimed, actually surprised.

"Urokodaki is a serious trainer, and has one of the styles with the most forms to it. Plus, you're incredibly weak," Giyu answered. "If he sent you to Final Selection, you'd die within the first day if he didn't train your body up."

"D-Damn… what is the Final Selection like?" Tanjiro asked as the trio walked onto the road leading out of the village, heading towards the mountains.

"You have to survive Demons for seven days," Giyu said.

"Demons?!" Tanjiro's jaw dropped. "But don't they-"

"Eat humans? Yes. Most participants die as a result. Only the ones that survive are entered into the Demon Slayer Corps."

"You guys are brutal," Tanjiro commented.

"That being said… it's the perfect place for you to try and train your taming powers," Giyu added, making Tanjiro confused. "If you think about it, the whole place is full of Demons, meaning you could try and figure out how you tamed your sister, and you could try and figure out how to tame other Demons. That place is the perfect training ground for your powers too. Who knows? You could learn how to wield your Haki there too."

"I… I never thought about it like that," Tanjiro said. "So, how many Demons are there?"

"Well, a couple hundred or so," Giyu replied monotonously, while Tanjiro's eyes widened.

"That's a lot!" Tanjiro exclaimed.

"And that's why it's so tough. We need the strongest Demon Slayers possible after all," Giyu said.

"But why kill so many innocent kids?" Tanjiro questioned, not okay with how the Final Selection went.

"We didn't do it. The Demons did." Giyu was clearly making this the end of this discussion.

"R-Right…" Tanjiro fell silent, and looked back at Nezuko. "Hey, are you doing okay Nezuko?"

"Yeah, I'm feeling… better," Nezuko said with more emotion than earlier. "Um… sorry, about earlier."

"Hey, it's okay," Tanjiro replied, smiling and slowing down a bit so he could walk beside her. "So, do you feel different now that you're... a Demon?" They hadn't talked much about this, since this reminded them about how their family was now gone.

"I… I don't know…" Nezuko bit her lip. "I don't feel that different. Well…" She opened her mouth and pointed at her fangs. "This is the only the I know that's different."

Tanjiro nodded. "I'll try to find a cure for you. And then you'll be human again." Tanjiro smiled slightly. Nezuko smiled back, but it looked more sad than happy, which confused Tanjiro a bit. "Um… is something wrong?"

"What if… I can't be cured?" Nezuko questioned, which made Tanjiro stop. The possibility did occur to Tanjiro, but that didn't mean he wasn't gonna stop looking for one. He'd forge one if he had too.

Unfortunately, he had no idea how he'd do that.

"I'll find one," Tanjiro told her firmly. "I'll do whatever it takes."

Eventually it had gotten late, but Giyu told them they were gonna keep walking.

"If we stop, we could be attacked by Demons," Giyu said. "And Nezuko is the only one safe from them, unless they used my sword to kill her."

It was sound logic, and so they continued walking, though Tanjiro nearly fell asleep a few times before suddenly he smelt blood. Immediately he ran forward, which surprised the two, and he arrived at a small house on the mountain. Tanjiro's heart dropped as if he just fell into a large never ending canyon that fell into the depths of the earth.

The Demon was here.

He opened the door and saw a man feasting on three humans, all of which were dead, and heavily bleeding, and looks of terror frozen on their faces. The man turned and looked at Tanjiro with slightly pissed red eye, that screamed demonic.

"I thought there weren't any other humans on this mountain…" The man said, before wiping his lips with his sleeve so the blood was off of his mouth. "I guess I can leave a memento." The man stood up.

"How could you kill them?" Tanjiro asked, starting to shake, his Haki suddenly coating his arms, all the way this time and also his chest area, and his legs, which made the man pause. "WHY did you kill them?! What did they do to you?!"

The man's eyes narrowed. "...so you've come back," he said. He growled. "Damn… you would've make a perfect replacement for the Twelve Kizuki."

Tanjiro was confused, but was still mad. "Who are you?! And why kill these people?!"

"I guess Reincarnation has it's limits," the man remarked. "I killed them cause I was hungry. Simple as that. As for who I am…

"I'm Muzan Kibutsuji. And I'll be putting you through my own… test…"

Tanjiro then instinctively dodged a sudden spike of what looked like bone, but he took his eyes off of Muzan in the process. When he turned back, he barely managed to block and punch aimed at his head, but was still sent flying into a tree, which broke on impact, and he also his three more trees before he stopped at the fifth tree, and he fell to the ground.

"Is this really all the new Demon Tamer has?" Muzan questioned as he walked out of the building, the bone spear retracting into his body. "A pity. I expected more of a fight. But, your powers must be only now awakening." Muzan walked closer to Tanjiro. "To be honest, I was kinda hoping I could go all out…" Tanjiro looked up, and coughed up blood, and he guessed a rib must've broken. He also took note that his Haki was gone.

So this was how he died. Broken, almost lonely and not accomplishing shit. He failed to avenge his family. He closed his eyes in rage.

Damn it!

"You pass." Tanjiro's eyes opened and he looked at Muzan who was chuckling. "What? You expected me to kill my only rival?"

"What?" Tanjiro was confused. Muzan simply smiled as he began walking away.

"Only one person rivaled me. We've fought 23 times, each ending in draws. So I'll count this as my win for now. So get stronger… I'll make sure I'm able to kill you with a clear mind in the future, when we meet for the last time." Muzan then disappeared, and Giyu and Nezuko appeared.

"Tanjiro!" Nezuko shouted as she ran to him. She rolled him over and lifted his shirt, and found he was bleeding. "D-Damn…" She looked away and her lip was quivering. "D-Damn…" She looked at Giyu. "Can you bandage him?"

"I'll try," Giyu said. "But what the hell happened?"

"I fought a Demon… He knew I was the Demon Tamer, cause my Haki activated…" Tanjiro said. "He… he killed three people in the building over there…" Tanjiro pointed at the building. "He's… strong…"

Giyu looked over at the building, and nodded. "Whoever he was, he was definitely strong…" Then he remembered what Tanjiro said. "Wait, they recognized you as the Demon Tamer?"

"Yeah… Kibutsuji did," Tanjiro said, using the name of the Demon who could've killed him, which made Giyu freeze. "Hey, why are you stiff as hell?"

Giyu then grabbed Tanjiro by the collar of his shirt and lifted him close to his face. "YOU IDIOT! YOU JUST LET THE ONLY MAN CAPABLE OF MAKING DEMONS GO!" Giyu shouted. "Where did he go?!"

"I don't know! His scent already disappeared! And he also teleported away or something!" Tanjiro answered, while Giyu let go of him and Tanjiro coughed up more blood.

"Nezuko, you bandage him!" Giyu ordered, which made Nezuko panic. "I'm going to try and end him right now!" He then ran off, and left the two alone.

Nezuko was internally panicking. While she didn't have to drink blood, that didn't mean the lust for it had left her systems. She was scared she'd started to drink from her brother, until nothing was left of him, and then Giyu would kill her. How could she do it?

"Hey… Nezuko?" Tanjiro began, snapping the Demon girl out of her thoughts. "Are… are you scared?"

She began slightly crying. "Wh-What if… what if I give into the urge and… I drain you of blood?" She curled into a ball. "I… I don't want to hurt you."

Tanjiro grabbed her hand, and give it a gentle squeeze. "If you need to, you can drink from me…" Nezuko looked up at him. "No homo of course."

Nezuko's eyes began watering more. "B-But-"

"Nezuko," he said more firmly. "I order you to drink some blood from my wound."

Suddenly her body relaxed, and she came to his side and pressed her lips onto the wound, and began sucking some of the blood out of it. She liked the taste of his blood, but it filled Nezuko with a massive feeling of guilt. She shouldn't be doing this… She shouldn't need to. And yet he insisted… why?

"Stop," Tanjiro ordered her, and she stopped and looked up at him. "Now bandage me." Nezuko then had him sit up and she began bandaging his wound, and she felt a little bit better now. She was glad that Tanjiro was able to stop her from just sucking him dry.

When she was finished, he hugged her, and she cried into his chest. "Why?" That's all she was able to say while he stroked her hair, and patted her on the back.

"Because, I want to help you," Tanjiro answered. "And if you need some blood, I can give you some. I'm only gonna let you take blood from me though. And no one else." He hugged her tighter. "Understand?"

"Yes… master," she said, trying to mess with him a little bit.

Giyu returned a while later, his sword sheathed and he looked a bit irritated. Tanjiro and Nezuko had already buried the three people Muzan had murdered. "He disappeared…" Giyu growled, before he looked up and saw the moon would be only be up for a little bit longer, as the mark of dawn came. "We should get moving." He looked at Tanjiro and Nezuko and found the two asleep right next to each other, leaning against each other. "Oh for Pete's sake."

"Let them sleep," a new voice said, and Giyu looked and immediately bowed. "They'll both need it for what's to come."

"You're right… I'm sorry, I was just… pissed," Giyu said.

"It's alright Giyu, I understand. I know how much you blame yourself for what happened back then," the voice said. "But let them sleep. They'll need it for what's to come." The voice chuckled a bit. "A Demon as a Demon Slayer… that's quite funny to think about."

That is as far as Nezuko and Tanjiro's relationship will go in this. Also, I wanted Muzan to appear.