Nezuko was in total fear of seeing the newly demonized person bitting his own wife. 

"No, Stop!" She cries, as the demon bit her as she was in total pain.

Nezuko took immediate action as she unleashes her hood, revealing to Muzan of who she was as the demon looked he looks at her. 

She tackles the demon as the woman declared in freight, "Dear!" 

Nezuko said, "No, you have to stay back, Madam. It's way too dangerous for you here. You have to be worried about yourself right now! Please, take a cloth from your hakoi and pressed it on the wound. " 

She turns back on her focus on the demon as she thought, "It's going to be fine! Everything will be ok! It has to be!" 

She turns to see some men helping the woman as she thought, "I'm just glad I was able to come straight away. The wife's wound isn't too fatal as it appears to be." 

"You have to do it harder! Tie it with a rope to keep the blood flowing!" She intructs them. 

"This man hasn't killed anyone yet. I have to stop him , before he can continue his desire to hunt down innocent people!" 

Muzan's daughter, shivers into his arms , as he asks, "Are you ok? You're shaking." 

"I'm scared." She replied. 

"I suggest we get out of here . " He said, as he leads them away from the throng. 

Nezuko notices that Muzan was gone, "Where he go? He was here just a moment ago!" 

Nezuko thought, "Damn it!" 

She yells at the demon walking away, "Muzan Kittsuji ! No matter where you go, no matter how hard you intent to hide,  I will not let you get away from me so easily! 

I'll follow you , no matter how long it takes, you hear me, Muzan?!!? 

I will slice you with my blade, I assure you! I never forgive you for what you had done!" 

The police came, as they said, "What's the commosion about? Hey, step aside!" 

"No! This man needs me! I know what needs to be done, please!" Nezuko pleads with the police. 

Suddenly, a voice said, "Enchanted Blood. Aroma of Visual Fantasy." 

Nezuko gasps of the voice, as the Demon Blood activates its power. 

"What is this scent?" Nezuko thought , as it was a first time she had smelled it before.

Nezuko looks around , seeing the patterned flowers as she thought, "Is this some sort of an attack? Where is it coming from? If it is an attack, then there's trouble! 

Wait a second. The scent's grown stronger. " 

A woman approaches her, with a boy by her side. 

She asks, "You still use to turn the "person" to a transformed demon. And you're trying to save him." 

She looks at her arm, "Let me aid a hand." 

She seems shocked of seeing it was a demon. "Wait, why? Why you want to help me? I thought that -" 

"I am a demon, but I'm also a doctor. I want to help you annilate Muzan." 

She seems shocked of a demon wants to annilate her own race. 

Muzan said, "Daddy has unfinished business. Head home without me." 

"Be careful dear. " His wife said. "Come home for dinner, Daddy." The girl said , beaming. 

The demon passed a drunk man and he seems to be totally drunken by the alcohol , as he said, "Look at the fancy clothes! You must be very stylish for my taste." 

He killed him along with his family members. 

Then he summoned two demons , as they were summoned, coming to his aid. 

"Bring me that Demon Slayer, she is troublesome. Understand me, and do it quickly." 

"Yes sir, right away!" They said, as they disappeared from him.

Nezuko went back to her brother as she was being scolded by the undon owner, "You literally decide to leave me, with this?

You dropped my precious udon I have to make , and you know it causes a lot of effort to make it?" He said.

Nezuko said, pleading for forgiveness, "I'm terribly sorry about that! I would like another bowl of it , if you don't mind?"

He turns to Tanjiro, "You should have one as well! You must be starving with that bamboo in your mouth." 

Nezuko sweats as  if that is really a bad idea if Tanjiro takes off his muzzle, "Um, how about I take two of the Udon bowls? Is that ok?"

The udon owner made the bowls as Nezuko sighs in relief that he was forgiven of having him of having this sort of trouble.

She eats them both as the udon owner was amazed at her eating skills. "Well, that was delicious!  I never thought of having this stuff again. Thanks for the food!" 

She grabs her brother's hand as the udon owner said, "Well as long you want, I can cook for you anytime! " 

As Nezuko and Tanjiro walked, she felt bad about leaving her brother behind without telling him.

"Tanjiro, I'm so sorry. I guess that I was being careless back there. I shouldn't left you like that." She apologizes to the demon boy.

Right in that moment, Tanjiro stops their walk as Tanjiro sees someone watching them as he was ready to attack that person.

"Tanjiro, what's up?" Nezuko asks of seeing her brother's behavior.

She looks at Tanjiro's direction as she notices it was the same boy she had encountered earlier.

Nezuko was amazed at him, "You waited for us to come to you? That is something new." 

The boy replied, "Well, I had to. Because she wants to see him, apparently." 

"Oh, well, you could've tracked us down by your scent, right?"

"I'm afraid that is impossible. She's living in a place that is invisible under a cloaking spell." He replied, "No one can ever find it, including you. 

For that matter, can I ask you something? Isn't that boy a demon? He looks pretty annoying to me." 

Nezuko said, "Hey, for one, he's not annoying! And he may be a demon, he's also my brother for crying out loud! His name is Tanjiro, ok?"

He turns away as he said, "C'mon, I'll lead the way. Let's go." 

"Sure, you should apologize though! Geez." Nezuko groans. 

They arrived to a wall, as the boy steps through, leaving Nezuko speechless.

"Whoa!" She said. 

"Come on in, before it gets dark." He said, as Nezuko follows the boy's lead, as she steps through the wall. 

As the siblings went through, Nezuko was amazed of the hidden house before her. 

"That is one big house. Bigger than I ever seen before. What you think, Tanjiro?" She asks her brother. 

The boy said, "Come over here, all ready! " 

Nezuko and Tanjiro walked up to the door of the house. "I still can't believe that she's inviting you both in. Personally, I think it's a bad omen." 

The boy knocks on the door as the woman said, "Come in." 

The boy said to her, "I'm back . " 

"Welcome back. I see you did as you're told." She said, as Nezuko noticed the woman she had saved earlier. 

"Is that ..." She asks, as she looks at the woman, "How is she?"

"She's fine, but her husband, I have to restrain him in the basement for now. " She replied to her. 

Nezuko was curious, "May I ask, is treating the human wounds unbearable for you?"

The boy smacks her to the stomach for her asking that question.

"Idiot. You honestly think of demon treat human while choking back their own drool at the smell of human blood?"

Nezuko rubs the smack as she said, "Sorry I asked. " 

"Stop that. Why is it with you with retorting to violence? We've talked about this." The woman scolds him. 

The woman said, "I never had the chance to introduce myself, haven't I? My name is Tamayo.

The boy next to you, is Yushiro. I hope he wasn't giving you two trouble. And I was hoping you two would get along. " 

Yushiro blushes as Nezuko reassures Tamayo, "Well, I hope to be. And Yushiro and I were just trying to know one other , that's all ." 

"By the answer to your question, It's not unbearable. I believe it is easier for me than other demons." Tamayo replied to her, "It's because I tweaked my body a bit. " 

"Wait, for real?" Nezuko said, in total amazement. 

She nods as she continued, "I also removed Muzan's curse too. " 

"A curse? What you mean, Ms. Tamayo. I don't understand." Nezuko ask, tilting her head in confusion of what the lady said. 

Tamayo said, "Come this way, and I will answer all of your questions." 

Tanjiro lies down as Nezuko was worried about her brother's rude behavior, "Hey, Tanjiro! That's bad manners, you know." 

Tamayo said, "Hey, it's all right. Please make yourselves right at home here. " 

"Ms. Tamayo?"

"Well, I guess I should explain now. As I said before, I have tweaked our bodies, so we can live as human beings, without devouring any blood. 

As long they have human blood, that's all we needed. " 

Nezuko said, "Wait a sec. Blood? Is that mean?"

"I know it's shock to you, but I only buy blood, under the guise as transfusions from those who doesn't meet those ends. " Tamayo said, 

"Of course, no more to than to impair them." 

Nezuko thought, "Oh, now I get it. It's no way I can sense any strange smell from those two. Incredible. But they do need human blood.

If blood is all they need, then Tanjiro..." 

"As you can see, Yushiro can get by with less blood. To be accurate, I'm the one who had transformed him into a demon in the first place. " Tamayo said, explaining the boy's condition.

Tanjiro was sliding down back and forth as Nezuko was stunned by Tamayo's stunning revelation of Yushiro's origin.

"You did that, Ms. Tamayo?!?" Nezuko asked. 

"Yes, but it's generally held that nobody but Muzan can reproduce demons." Tamayo replies, "More than 200 years, I was able to transformed Yushiro into a demon." 

Nezuko gasps, "T-Two hundred years?!? You were able to accomplish to transform Yushiro for that long?!?

I'm more shocked right now at the moment! Just how old you are, Ms. Tamayo?"

Yushiro smacks her, "That's really rude, of asking Ms. Tamayo her age! How dense can you get!" 

Tamayo scolds him, "Yushiro! Stop that right now! She was just asking a question. Don't do that again or else you'll regret it." 

The boy steps aside from her as if she was his own mother, "Ok! I promise not to do that again!" 

He thoughts, "She's terrifying when she's angry." 

Nezuko coughs from the attack as Tamayo said, "There is something I need to clear up. I am not creating any more demons. I only peform the procedure on the termily ill, or those who are gravely injured that they don't have the time to live.

I have to ask them beforehand if they want to transformed into a demon."

Nezuko sniffed at Tamayo. "She's really not deceiving person. I know now that she can be a great assent to me in my quest to restore Tanjiro to his human form. She's someone I can truly trust with right now." 

"Ms. Tamayo, can I ask you a question? Is there any possibly a way to restore a demon back to it's human form?" 

Meanwhile , the demons that hunted down Nezuko has found their location. 

"Is this the place, brother?" She asks. 

"Yes, I believe so. Let's go ." He said. 

Tamayo said, "Well, there is a way for turning into a demon, back to a human." 

Nezuko gasps of having the reality she had hoped for had arrived at that precise moment. 

"Please tell me how!" She said, as Yushiro said, "Hey, calm yourself. Don't be too close to Ms. Tamayo!" 

She was flipped over by him, as Tamayo was angry at the sight. "Yushiro..." 

He realizes it right away as he said, "Sorry, sorry! I just flipped out by accident! I swear! She's not hurt." 

Nezuko groans, "Seriously, Yushiro. You have to loosen up a bit. Ms. Tamayo, please, tell me how to turn Tanjiro back to his human form." 

"Well, for this case, for any kind of treatment, or wound, there is a medicine , right?" Tamayo said. 

"At this time, I am unable to transform a demon back to a human yet, but we are dedicated to establish a method to it. 

In order to do this, I have a favor to ask you. 

To produce an elixir, it is necessary for me to study the numerous of demon blood. Well, for one permission was to examine your brother's blood.

Two, you need to receive blood samples from the demons as closely related to Muzan as possible.

Tanjiro's condition is unique, unexplainable, and rare. I understand that he had slept for two years. 

I believe that his body underwent changes during that time skip. Normally , a demon who went that long without consuming the flesh, or a human or beast, would unquestionably go berserk. 

But it seems like it's not the case for Tanjiro. You wouldn't need to be worried about that happening to him.

This miracle is the key of solving this mystery." 

Nezuko looks at the demon , as she thought, "Oh , Tanjiro." 

She touches her brother's cheek, as Tanjiro muzzles her hand. 

Tamayo said, "I know it's hard for you, but I think it's the best solution I can think of. When I mentioned about being related to Muzan, I mean by the demons who are more powerful than him. It's not easy of getting those samples if they're after you.

Are you still going for these dangerous requests?"

Nezuko said, looking at her brother, "I know it's going to be harder than I thought it would be. But I thought about it every moment I can, to solve of how to get Tanjiro back to his human form. 

I'm going to do it. Even if you still researching the blood of the demons, to create this medicine, this means that Tanjiro wouldn't be the only person being cured. The other people would be saved as well, right?"

Tamayo seems to be relieved of Nezuko's decision to help her in her cause, as she gave her an reassuring smile, as she said, "Yeah, that's what I am hoping for." 

Nezuko smiles back at her as Yushiro glares at the young Demon Slayer. 

Suddenly, Yushiro felt something. 

"Get down, quick!" He yelled. 

Nezuko notices the two demons as she thought, "Oh, great! I never thought that things would be more complicated! "