Muzan quickly slashed a man who was walking by in the back of his neck, but Y/n and Tanjiro were the only ones who noticed it. The man grabbed his neck in pain and his wife looked at him concerned.

Wife: What's going on? Are you all right, sweetheart?

The man then started to turn.

Wife: You look pale.

The man who now became a demon bit his wife which made a whole scene as the crowd looked in terror.

Panic was still happening until Y/n kicked the man who turned into a demon away from his wife.

Y/n: Tanjiro, quick! Muzzle this guy!

Tanjiro took off his head cover revealing his Hanafuda earrings which Muzan saw and also sensed something about Y/n as Tanjiro used his head cover as a gag.

Wife: No, sweetheart!

Tanjiro: Listen! You need to worry about yourself, Ma'am! Cover that wound and apply as much pressure as you can!

Tanjiro was still holding down the newly transformed demon as people helped Y/n with the woman.

Tanjiro: It's all right. It'll all turn out fine. The woman's wound doesn't look fatal! Press down harder! It needs more pressure, tie it down with a rope!

Y/n: Here.

Y/n got out a cloth that looked like it was from his old haori and used it to tie down the woman's wound. While the chaos was happening, Muzan's "daughter" cried into his chest.

Muzan: Are you all right? Don't look, okay? Rei, I think we should go. It's not safe.

Him and his "family" we're walking away and Tanjiro looked at him furiously and then turned his attention back to the man turned demon.

Tanjiro: (Thinking: Damn. Damn it all! I can't leave this man alone here.)

He looked at Muzan.

Tanjiro: Muzan Kibutsuji! No matter where you go, I promise you won't escape me!

Rei: What's the matter with that boy, Tsukihiko? Tsukihiko?

Tanjiro: You can run as far as you want! I'll follow you to the ends of Hell, and my blade will be the last thing you see! I'll never forgive you for what you've done!

Y/n: And on my life I swear this, I will help him kill you! And you will be shown no mercy! We will make you feel the pain you made the people you killed felt! Not even the flames of Hell can save you from our rage!

The police ran to them.

Police 1: What the hell's going on here?

Police 2: Another drunk and a psycho?

Police 3: Step away from that man and masked guy right now, kid!

Tanjiro: I can't! Bring restraints to hold this man down! Quickly!

Police 1: Get away from him! Get up!

The other two surrounded Y/n.

Police 2: Okay, kid. We need you to calm down.

Police 3: Don't make us hurt you.

Y/n: You hurt me?

Y/n began to laugh maniacally.

Y/n: That's so thoughtful of you officers, but I doubt you'd be able to make me break a sweat!

Y/n ran to an officer and punched him in the rips which caused the officer to pass out and he easily broke both of the other one's arms.

Y/n: You really should've known when you've bitten off more than you can chew.

Suddenly, a yellow mist that made flowers appear in the air covered the area.

???: Scent of Illusory Blood, Visual Dream.

Y/n: Where the hell did all these flowers come from?

Tanjiro: Y/n, could this be some kind of spell?

Y/n: Your guess is just as good as mine.

Tanjiro: The smell's getting stronger.

A women with purple eyes, brown hair, a purple kimono with flowers on it and a flowery hair piece keeping her hair in a bun. She was accompanied by a young man with blue eyes, slit pupils, green hair, and white formal wear.

Woman: I beg your pardon, but you said "person" even though this particular person is now a demon. And now you're trying to save him. So, if you don't mind, I'd like to lend you both a hand.

Tanjiro: Why in the world would you... your scent... I know what you are.

Woman: You do. I'm a demon. But I am also a doctor. I want to help, and I want to destroy Kibutsuji as well.

Meanwhile, with Muzan.

He was walking down an alley where two drunk guys and a sober female were ahead of him.

Drunk guy: Come on, let's hit one more bar!

Girl: Are you feeling alright there?

Drunk guy: Yeah, I'm fine! I'm not even a little bit drunk yet-

He bumped into Muzan.

Drunk guy: Huh? Hey, what the hell are you doing, mister?

Muzan stayed silent then spoke.

Muzan: Apologies.

He continued walking but the drunk guy grabbed his shoulder.

Drunk guy: Where are you going?

Muzan: I'm terribly sorry, but I'm in a bit of a hurry.

Drunk guy: What the hell did you say to me? Look at you, all dressed up in your fancy pants clothes. You're pissing me off! You and your stupid pale face... you look like you're about to fall over dead!

Muzan looked at the drunk guy with anger in his eyes.

Drunk guy: Aren't you going to say anything? Or did you just croak?

Muzan raised his fist and punched the guy into a wall.

Girl: Oh no!

Big guy: What did you do to my kid brother?!

The girl checked on him.

Girl: Oh, he's dead! This monster killed him!

Big guy: You bastard!

He was about to punch him, but Muzan kicked him high into the air which made the big guy spit blood and fall to his death. Muzan than grouched down to the girl.

Muzan: So, does my complexion look at all unhealthy to you?

He put a hand on her face as she was still terrified.

Muzan: Does my face seem unusually pale? Do I look a bit sickly? Does it appear I'm not long for this world? Do you fear for my life? You couldn't possibly be more wrong. I'm very much alive, and not far from perfection.

The nail on Muzan's intex finger turned sharper and he drilled it into the cowardly girl's forehead.

Muzan: What do you think would happen if I gave you a constant stream of my blood?

The girl started shaking.

Muzan: The human body is unable to withstand such a rapid transformation.

He pulled out his finger.

Muzan: And it's cells are destroyed.

The girl died by melting away due to cell destruction. Muzan than stood up and snapped his fingers which made two demons, one male one female, showed up and bow behind him.

Muzan: There are two Demon Slayers. One wears Hanafuda earrings, and the other one wears a bird mask. I want you to bring me the head of the one with Hanafuda earrings, but bring the one with the bird mask back to me alive. Got that?

Male demon: Yes.

Female demon: As you wish.

They vanished.

Back with Tanjiro and Y/n.

Toyo: Now, you two listen to me! All right. It has nothing to do with money, that's not the problem here! I just can't forgive the fact that you two would walk away from a perfectly good bowl of udon!

Tanjiro: We're so sorry! Can I please have another one?

Y/n: Me too.

Toyo: To eat?

Tanjiro/Y/n: Yes.

Toyo: You promise?

Y/n: We promise.

Toyo: All right!

The owner turned to Nezuko who was now awake.

Toyo: What about you? If you're eating udon, you better take off that bamboo thingy. What the heck is it anyway? Now, take these chopsticks! All right.

Tanjiro grabbed the owner's hand and got in his face.

Tanjiro: I'd like a bowl of udon! In fact, give me two of them!

Y/n: Give me three bowls. Two Sanukis, and one Miso nikomi.

Toyo: Uh, okay.

He gave them their bowls and was shocked to see how fast they devoured them.

Tanjiro: Thanks for the great meal!

Y/n: We we're fools to turn away from it the first time.

Y/n paid Toyo.

Y/n: Here, for your troubles.

Him and Tanjiro then left with Nezuko.

Tanjiro: I'm so sorry, Nezuko. I left you behind.

Y/n: You're not the only one, so don't feel bad, Tanjiro.

Tanjiro: Y/n, can we talk about your outburst?

Y/n: Huh?

Tanjiro: See, usually you give of the scent of a kind and gentle person, but then you want to violently hurt someone.

Y/n: If it helps, I won't do it to you or Nezuko.

Tanjiro: That's not the point. I don't want you to do it to anyone.

Y/n: That would be like telling a bird not to fly.

Nezuko suddenly stopped.

Tanjiro: What is it? What's wrong?

Y/n: Is it a demon?

They looked ahead and saw the young man who was with the demon lady.

Tanjiro: Are you out here waiting for us?

Young man: I'm here on her orders, I'm supposed to bring you two back with me.

Tanjiro: You know, I could've just tracked your scent.

Young man: Our hiding place is protected by a concealment spell. You'd never have found it.

Tanjiro: Concealment?

Y/n: Is that your Blood Demon Art? Or something else?

Young man: Before we go...

He points at Nezuko.

Young man: Did you know that girl is a demon? And not much to look at.

He then points to Y/n.

Young man: As for you. I don't know what it is, but there's something off about you. It's neither demon or human.

Y/n: Listen here, I don't care what bull shit you say about me, but it's when you insult Nezuko when we have problems.

Tanjiro: Yeah, you have got to be out of your mind. Who would look at Nezuko and think she's ugly?! She was the most beautiful girl in our whole town, you know that?!

Y/n: Most beautiful girl in your town seems like a bit of an understatement. Try the entire country.

Nezuko blushed a little.

Young man: Please, if you believe that then you clearly know nothing about beauty.

Y/n: Neither do you it seems.

Young man: Look, we're wasting time. Let's go.

They started to walk and Tanjiro kept berating the young man for calling Nezuko ugly. They eventually came face to face with a wall.

Y/n: Is this the concealment spell?

Young man: Yes. Come on, while nobody is looking

They went through the wall and saw a nice big house.

Tanjiro: I could've sworn that street was a dead end.

Young man: Pay attention! Now, make sure you don't offend the lady in any way.

He got in Tanjiro's face.

Young man: Because I couldn't care less what happens to you. I only brought you here because she insisted, got it?

Tanjiro: Uh, okay, sir.

Y/n: Oh, that reminds me.

Young man: Huh?

Y/n grabbed him by the jaw, lifted him up and punched him really hard into the ground.

Y/n: That'll teach you to call a beautiful girl ugly and get in my friends face to threaten him.

Tanjiro: Y/n!

Y/n: Don't worry, he's a demon, he'll heal in no time. And besides, I didn't do anything he didn't deserve. Now, come on. Let's see what this lady wants.

Y/n knocked on the door.

Lady: Come in.

He opened the door and the young man got up with his jaw broken, but when he saw the lady he fixed it.

Young man: I have returned, my lady.

The lady was treating the woman who got bitten earlier.

Lady: I'm glad you made it.

Tanjiro: I'm sorry that we left everything for you to take care of.

Y/n: Yeah, and I'm sorry I snapped your lackeys jaw, even if he deserved it.

Lady: You did what?

Tanjiro: We'll worry about that later. How's the woman?

Lady: She'll make a full recovery. But her husband has to be locked up, he's restrained in the basement.

Tanjiro: Isn't it difficult treating humans? All of the blood.

The young man punched Tanjiro in the chest.

Young man: Is that what you think? She chokes back her own drool when she treats a human? Cuz demons can't control themselves.

Y/n cut his arm off with Eleatara.

Y/n: Despite what I did to you out there, you still insist on being a spiteful little asswhole. You must be dumber than your big head, if that's even possible.

The young man glared at Y/

Lady: Please, don't fight here. Why would you both resort to violence.

Y/n: My master said that's the only sure way to invoke discipline.

Tamayo: Did I ever introduce myself? Apologies, my name is Tamayo. And this is Yushiro. I hope you can be friends.

Y/n: Fat chance.

Tamayo: Treating humans isn't all that difficult. At least not for me, but it's different for other demons. My body's physiology has gone through some considerable changes and I've removed Kibutsuji's curse.

Tanjiro: What curse? And what kind of changes?

Y/n: Oh, you mean "that" curse.

Tanjiro: You know about it, Y/n?

Tamayo: Come with me.

They followed her into a different room and Nezuko laid on the floor.

Tanjiro: Hey, Nezuko, that's bad manners!

Tamayo: It's quite all right. Make yourselves at home.

Tanjiro: Sorry about that.

Y/n: Look, just tell us what you want so we can get out of your hair.

Tamayo: As I was saying, I made several adjustments to our bodies so we can continue to live without harming any human beings. We can survive on just a small amount of blood.

Tanjiro: Wait, blood? So you're saying...

Tamayo: I understand if either of you find it distasteful, but I buy it from those in poverty, I tell them there for transfusions. But of course, I've never take it enough blood to impair anyone.

Y/n: Well, I think you're much better than me, I need to defile graves so I don't starev.

Tamayo: So, you eat humans, but there's something about you that isn't quite demon.

Y/n: Yeah, I'm half demon.

Tamayo: Half?

Y/n: I know, it surprises everyone at first.

Tamayo: Back to what I was saying. Yushiro needs even less blood than I do since I'm the one that turned him into a demon.

Tanjiro: You turned him? But how?

Tamayo: How did I do it? As far as anyone knows, Kibutsuji is the only one who can create demons. And that's more or less accurate. It took me over 200 years, and after all that I could only transform Yushiro.

Tanjiro: Two... two hundred years. It took you 200 years before you could figure out how to transform just one person? How old are you, Miss Tamayo?!

Y/n: You're a hag.

Yushiro punched them both in the chest with his regenerated arm.

Yushiro: You should know better than to ask a lady her age and to call her such a word!

Yushiro started rapidly jabbing Tanjiro's chest and was about to do the same to Y/n but Y/n quickly broke his hand.

Y/n: Have fun bowing to your lady with a broken hand.

Yushiro glared at him and sat back down.

Tamayo: I would prefer you don't call me things like that.

Y/n: You're right, I just said that so I could get back at your lapdog for calling Nezuko ugly.

Tamayo: Now, I'd like to clarify what I said further. Creating more demons is not one of my goals. And I only do so when necessary.

Y/n: You mean like helping someone who's terminally ill or fatally injured?

Tamayo: Correct. And even in those cases, I always ask in advance if they truly prefer to live on as a demon.

Y/n: (Whispering to Tanjiro: Can you tell if she's trust worthy?)

Tanjiro: (Whispering: Her scent is pure, no sign of deception. I think we can trust her.) Miss Tamayo, once someone becomes a demon, is there a way to turn them back into a human again?

Tamayo: A way to make a demon turn human again? There is.

Tanjiro: Please tell me how!

He was about to run to her but Yushiro stopped him.

Yushiro: You keep your distance from Lady Tamayo!

Yushiro flipped him over.

Y/n: That's it!

Y/n ran at Yushiro and ripped his head off.

Y/n: I have had it with you hitting my friend.

Tanjiro: Y/n, give his head back!

Y/n: But, Tanjiro.

Tanjiro: See, I'm fine, but you ripping someone's head off, rather their humans or demons is not okay.

Y/n: (sigh) You're lucky my friend has a kind heart.

He gave Yushiro's head back to his body.

Y/n: But if you attack Tanjiro again, I will cut your head off where you stand.

Yushiro reattached his head.

Yushiro: I'll get you back one of these days.

Tanjiro: Can you please tell me how.

Tamayo: There's always some kind of medicine or aide, no matter the wound or ailment. I don't know how to turn a demon back into a human yet, but there must be a way. And I promise, we are going to find it, we are dedicated to establishing such a treatment. Towards that end, I'd like to ask you two to do something for me. In order to discover a cure, the first step is studying the blood of several different demons. Which means I have two favors to ask you both. First my favor for Tanjiro, I'd like permission to study your sister's blood. My favor for you Y/n, I'd like permission to study your blood. My third favor is for both of you, I need more samples, I'd like you both to retrieve them from demons closely related to Kibutsuji as possible. Nezuko's condition is extremely rare, perhaps entirely unique. I understand she was asleep for two straight years, I believe her body changed during that time. In most cases, that long without food, neither human flesh nor even the blood of some of animal would undoubtedly grow violent. However, against all odds, Nezuko is showing none of those signs. That miracle could be the key to finding a solution. As for you, Y/n. Your the only half demon, half human I've met and maybe that could've made special blood that can help us. But my third request is not simple one. When I say "Demons closely related to Kibutsuji." I mean demons with powers such like those of Kibutsuji himself. Extracting blood from that kind of demon won't be easy. What do you both think? Are these requests acceptable.

Y/n: There okay with me, but tell me, would the Twelve Kizuki be perfect blood samples?

Tamayo: Yes, great suggestion.

Tanjiro: The Twelve what?

Y/n: The Twelve Kizuki are the twelve strongest demons in existence. Though, I don't really know that much about them only that they're sure to have great amounts of Muzan's blood, but that makes way deadlier than the average demon.

Tanjiro: Well, if it's really the only way, then I'll do it. Besides, if Miss Tamayo researches all that blood and can create this medicine, then it won't just be Nezuko, will it? A whole lot of other people will be saved too.

Tamayo: Yes, they will.

Tanjiro blushed a little and Yushiro growled at him and Y/n became ready to draw his sword and that's when him and Yushiro sensed something.

Yushiro/Y/n: Get down!

Y/n ducked with Tanjiro and Nezuko while Yushiro hugged Tamayo trying to protect her from two raging temari that went outside after wracking the room and went to a female demon with short black hair and orange at the end, orange eyes, and black haori over an orange kimono. She was also accompanied by a male demon with really short black hair, blue beads around his neck, closed eyes, and a black and green haori over a green kimono.

Male demon: Did you decide how to kill them?

Female demon: Ruthlessly.

She threw her temari again and they started to laugh maniacally.
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Preview.

Tanjiro: Today, I'm starting with the Taisho-era secret! Yushiro's hobby is writing in his Lady Tamayo journal. And hear he churns out seven to ten pages a day.

Y/n: It's much like how me and Tanjiro wrote journals for Nezuko.

Tanjiro: Looky here, shall we take a peek in that journal?

Y/n: Look, I have no idea how you got this, and I may hate Yushiro from the bottom of my heart, but I have too much honor to go through his personal stuff.

He threw the journal to the side.

Tanjiro: Man, your no fun.

Y/n: Why don't we have some fun next time, on Chapter 9, "Temari Demon and Arrow Demon"!

To Be Continued.