3rd POV. Earlier, somewhere at Mt. Natagumo.

The three Hashiras that Kagaya sent over due to the dire situation at Mt. Natagumo.....

Kocho Kanae, Tomioka Giyu, and Kocho Shinobu.

They finally reached the mountain and saw the horrible carnage which was caused by the demons' rampage.

Surveying the area, the three reached the same conclusion that a member of the Twelve Kizuki is hiding at the mountain.

In order to cover more area, they decided to split up.

Shinobu will take the west side.....Giyu on the north.....

Kanae took on the eastern part of the mountain.

On Shinobu's side, she encountered the sister spider and the cocoons which the other demon slayers are trapped in.

On Giyu, he defeated the Spider Father, and saving Inosuke.

As for Kanae, she noticed more carnage. Corpses of the demon slayer corps.

To her shock however, instead of what she saw earlier of corpses being scattered around, they were all lined up in proper order and their swords are stabbed next to them.

Kanae: It seems like someone wanted to bury all of them.....but they can't due to how dire this situation is.

Kanae: They're kind.....

Kanae: I got to investigate even further.

As the three pillars are on their respective sides......

Sora and Tanjiro were fighting against Lower Five.......and won.

With Sora lying unconscious from unleashing his Mangekyo Sharingan........

Tanjiro who is much more injured checks on Nezuko and saw that she is fine.

Tanjiro: We won......

Tanjiro: Just now......! I saw Dad......

Tanjiro: He saved us, nii-san and I......I didn't know but how did nii-san and I used that attack.

Tanjiro: The kagura that's been in our family for generations......

Tanjiro: Nii-san's movements were also different and much more fluid, just as how he also danced the kagura itself every new year......

Tanjiro: When Dad died......since I still can't perfect the Hinokami Kagura.....nii-san is the one who performed the kagura every new year.

Tanjiro: I'm just glad that even without Dad, nii-san is still there to guide me.

Tanjiro: That is probably the reason why Dad wanted to pass the kagura to nii-san as well.......

Tanjiro: I'll think about this later......

Tanjiro: For now......

Tanjiro: Nezuko......

Nezuko's blood demon art burned the threads that bound her as she fell on the ground.

With Tanjiro's injuries and from using his breathing styles consecutively, he fell down to which he didn't have the choice but to crawl towards his sister.

When he reached her......he saw that his sister is fine.

Tanjiro: Thank goodness she's slowly healing his injuries......

Tanjiro: But nii-san......he just suddenly fell down. I can't see him, but his scent is faint......

Tanjiro: I need to rest for a while, I got to make sure that Nezuko is safe. Her box......where is it?

Meanwhile.......

Uchiha Sora who is lying unconscious just a few meters away from Tanjiro and Nezuko.......

The young Uchiha begins to have nightmares.....

As a result of him activating his Mangekyo Sharingan, he was now forced to revisit those nightmares.

With a part of his memories restored, his memories of him discovering the massacre of the Kamado Family, his adoptive family.......

He was forced to relive them.......

He also remembered the memory where he battled Muzan.....

The horror of facing the Progenitor of Demons himself......

That is enough for Sora to have nightmares.

This is the genjutsu that Uchiha Madara placed upon Sora.....

Tsukuyomi, the genjutsu that Madara placed upon his descendant. A genjutsu that traps the victim in a world where the victim will be tortured by their darkest memories over and over again.

Even though he was forced to relive his nightmares when the Kamado Family was massacred, it still scarred him psychologically.

Over and over........

In every second that passed in the real world, it is equivalent to 7,142 loops.

While Tanjiro and Nezuko were running for their lives.......when Shinobu discovered that he is travelling with a demon......

Sora is facing his own nightmares.......

Sora: Stop.....! Stop.......! Please!

Sora: PLEASE! MAKE THIS STOP! MAKE THIS STOP!

Sora: I-I can't! I can't bear this anymore! Seeing my family die over and over again! Seeing these other nightmares that are also filled with dying people.....!

Sora: PLEASE! MAKE THIS STOP!!!!

Sora: Tanjiro, Nezuko......! Anyone! PLEASE!

Unfortunately for the Uchiha, no one can hear his cries for help. Not because he is being ignored.

But it is because there is no escape route with the genjutsu that was placed upon him.

Every second, every minute, every hour......

Endless loops of nightmares......

That is what Sora had to experience.

Back to Tanjiro, he is already knocked out by Kanae's Tsugoko, Tsuyuri Kanao.

But before getting knocked out, Tanjiro called out for Nezuko to run, and as much as he wanted to tell Nezuko to search for Sora, he just can't reveal that a civilian just got involved.

He can't draw his brother to this unnecessary mess.

Tanjiro: Nii-san......Nezuko.......

That was all that he uttered before passing out.

Nezuko continued to run from Kanao, not until the crow relayed a message to bring Tanjiro and Nezuko to the Headquarters.

Shinobu and Giyu who had a skirmish, followed the orders. As for Kanae who met up with the Kakushis, she also received the message of the crow.

As for Uchiha Sora, Kagaya made sure that Sora's identity wouldn't be found out.

So, Kagaya sent out a secret crow to watch over the unconscious Uchiha.......

As he is secretly suffering within his mind......

This lasted even when the Sun is up......

Finally, Sora was able to wake up from the endless loops of nightmares.

Sora: Tanjiro! Nezuko!

Sora: *pant* *pant* *pant*

Sora: *pant*

Sora: W-What's going.......

Sora: Huh? Wait.......

Sora woke up, and he slowly collects himself.....

The sun is already high........

Sora: Wait.....morning? It's already morning? No, wait, based from position of the Sun......

Sora: Almost noon?

Kasugai Crow: Kamado Sora! Caw! Kamado Sora!

Sora: AAAAAAAAHHHHHHHH!

Sora freaked out and saw that a Kasugai Crow is perched on a tree branch.

Sora: What the.....? A crow.....?

Sora: Deep breathes, Sora. Deep breathes.......

After collecting himself......

He extends his arm in order for the crow to perch itself.

Until......Sora immediately grabs the crow on its neck.

Sora: You......don't you just go and freaking people like that when they wake up!

Sora: You want to get eaten? You know, I wouldn't mind eating a crow for breakfast!

Kasugai Crow: *terrified*

After Sora calmed down.....he lets go of the crow as he takes another pause in order to replenish his strength.....

He recollects the battle with Rui......

Sora: The Hinokami Kagura......how? Dad just appeared out of nowhere......not to mention, it's not only me.....

Sora: Tanjiro also used it as well.

Sora: Dad......he saved us......Tanjiro and I......

Sora: But then.....before I even severed the demon's head.....flames suddenly burned the threads that was about to cut me......

Sora: A blood demon art......flames.......

Sora: Another demon.....was around that time......?

Sora: Another demon..........

He realized it after 10 minutes.....

Sora: It's Nezuko! That was Nezuko's blood demon art, right!?

Sora: She saved me.......!

Sora: She saved me.....both she and Tanjiro.......

Sora: Haha.....

Sora: I should be the one protecting them and yet.......they were the ones who saved me........

Sora: ...........

Sora: Wait, speaking of Tanjiro and Nezuko......!

The Uchiha slowly stood up on his feet and surveyed the area.

Sora: The Sun is already up.....Nezuko shouldn't be out here......but I can't see Tanjiro or the box either......

He slowly traced his steps back....and went to the spot where he and Tanjiro fought Lower Five.

Sora: No traces left.......

Sora: But still, I can't believe it......

Sora: Tanjiro and I were able to get toe-on-toe with a member of the Twelve Kizuki......

Sora: Twelve Kizuki.......oh shit!

Sora: Did Tanjiro managed to extract the blood!? Wait, but first, where the heck is he!?

Sora tried to look anywhere but he didn't find any.

Sora: I got no choice.....!

Sora: Hey you, Crow!

Sora: Do you know where a boy wearing a checkered haori and a scar on his forehead went?

Kasugai Crow: He is at the headquarters.

Sora: Headquarters? Of the Demon Slayers?

Kasugai Crow: Correct....!

Sora: Considering that Tanjiro have been fighting a hard fight before I arrived to save them.....

Sora: And maybe he fought the Demon Slayers who were also controlled like a puppet......

Sora: It's impossible for him to get out there unscathed.......

Sora: I see. Thank you.

Sora: Can I visit him there?

Kasugai Crow: You can't.

Sora: I can't!? Wait, what do you mean I can't!?

Kasugai Crow: Civilians aren't allowed to enter the Headquarters!

Sora: Ah, maybe they were hidden? Yeah, considering Muzan......

Sora: It seems like it is wise for them to do so.

Sora: I do hope that Tanjiro is fine......and Nezuko is safe. The box isn't here, maybe.....

Sora: As long as they don't discover that Tanjiro is travelling with a demon.

Sora: Hey, crow, is there a nearby town near this mountain?

Kasugai Crow: East! East! There is a town east of this mountain!

Sora: I see. I'll be travelling east. Tell Tanjiro that I travelled a nearby town east of Mt. Natagumo.

Sora: After he recovers, tell him to meet me there in order for us to continue our journey.

Kasugai Crow: Acknowldged! Caw!

The crow flies off as Sora decided to travel on the town that the crow directed.

Sora: I got separated from Tanjiro and Nezuko again.

Sora: But knowing they are in a safe place. I can rest easy.

It took him a while to reach the place, as he is still exhausted from his previous battle.....

He took breaks for at least 30 minutes.

He endured hunger and thirst.

And when the sun is about to set, he finally got reached the town and he went to a restaurant to eat up.

After having his dinner, the Uchiha decided to go to an inn to stay for the night.

Inside his room, Sora lay down, staring at the ceiling......

Sora: *sigh*

Sora: Again.....huh? Those nightmares........

He shook his head not wanting to think about it.

He then remembered when he reunited with Tanjiro and Nezuko.

Sora: Yushiro did say that my eyes are strange......

Sora: Red eyes and three tomoe pattern......?

Sora gets out of his bed and grabbed a mirror on a nearby table and take a look upon his face.

Blue eyes.......

Sora: What does he mean that I have those strange eyes? Hmmmm.....now that I think about it....

Sora: When I was fighting Inosuke, I got a feeling that I can read his movements.....

Sora: And with Rui.......I felt like my movements are fluid.......

Sora: So, if Tanjiro has a sharp nose, and Zenitsu has sharp ears......

Sora: It means I have sharp eyes.....?

Sora closed his eyes trying to focus.......

Sora: Hmmm, how did I do that I wonder?

Sora: Maybe if I focus I can see that again?

When he focused and reopened his eyes.......

His blue eyes turned into......

Red eyes with three tomoe pattern that forms a wheel.

Sora: Whoa! So this is what Yushiro and Tanjiro was talking about!

Sora: Also, is this the reason why I was able to read Inosuke's movements?

Sora: If so.....! Then this might be helpful!

Sora: Hmmmmm, now then.......

Sora: How do I turn my eyes back to normal......?

Sora: I guess I should also try closing my eyes once more, this time, relaxing myself.

He did that.....and once he reopened his eyes, it turned back to his normal eyes.

Sora: Oh....! Amazing......

Sora: To think that I have these eyes.....

Sora: Wait, is this also why I also got exhausted every after fight? Now that I think about it, my head hurts after that, huh.

Sora: Maybe I shouldn't abuse this ability too much.

Sora: Use them when necessary....

Sora: And I got to be careful....

Sora: I can't let other people saw these eyes. They might mistake me for a monster or worse.......a demon.

Sora: I also felt like when I'm feeling extreme emotions......yeah, it seems like I also have to calm down.

Sora: Hatred can be dangerous. It is like fire that if it went out of control.....it consumes everything on its wake.

Sora: I have to control my emotions as well.

Sora: All right. I guess that seems about today.

Sora: It seems like I'll be staying here for days in order for Tanjiro recover and come here.....

But his plan to stay never went accordingly, a Kasugai Crow perched on the window of Sora's room, and when he noticed it, he knew it was a Kasugai Crow.....

Kasugai Crow: Kamado Sora, you are called to a special summon

Kasugai Crow: You are to travel to the Ubuyashiki Estate.

Sora: Huh? Me? But I thought civilians aren't allowed to—

Kasugai Crow: Oyakata-sama personally requested your presence.

Sora: Oyakata-sama?

Sora: Wait.......the Master?

Sora: THE MASTER OF THE DEMON SLAYER CORPS!?

Kasugai Crow: Yes. He wants to talk to you, now.

Sora: But why? Wait, Tanjiro!? What about Tanjiro! Where is he?

Kasugai Crow: He is recovering and in a safe place.

Kasugai Crow: We must hurry. The master is requesting your presence immediately.

Sora: O-Okay! Okay! I get it. Let me pack up.

The Uchiha packed up his stuff and payed for his stay at the inn.

Kasugai Crow: Follow me.

Sora follows the crow and after atleast a few hours......

Kasugai Crow: We're here.

Sora: Woah. This is the Headquarters of the Demon Slayer Corps, huh.

???: Welcome.

Sora: AAAAAHHHH!

Sora: Who the—

Standing at the entrance of the estate, a young girl with white hair, dark purple eyes, wearing a beautiful kimono, with a maroon obi and a ribbon on the right side of her head.

Hinaki: I am Ubuyashiki Hinaki. The Master is waiting you on his quarters.

Sora: O-Oh.

Sora followed the young girl and they reached their destination.

Hinaki: Oyakata-sama, I brought him.

???: Let him in.

A soft voice rang out as Hinaki slides the shogi door open, and reveal inside a room, there is a man with black hair, wearing a black kimono, and a white haori with purple flames on the lower part of it.....

As the room lit up, Sora finally got a clearer view of the man.

A man with black shoulder length hair, and the prominent thing that caught Sora's eyes.......is the upper part of his face, as if it is rotting down.

Sora: Is he sick or something....?

???: You may sit down.

A soft and calming voice was heard from the man. To which when Sora heard it......

Sora: His voice.....it's so gentle.....as if I'm at peace.....

Sora: And why does it sound and feel so familiar.......?

Nevertheless......

Sora just gently followed, and the shogi door was closed.

There is silence inside the room, and Sora couldn't also help but notice another person sitting beside the man.

A woman with white hair is sitting beside the man.

Sora kept quiet as he is nervous.....

???: No need to be nervous, Sora.

Sora: .....!!

Sora: Wait, come to think of it, how does this man knew my name?

???: It's been a long time, Sora.

Sora: Huh?

???: Sorry, I mean.......

???: Nice to meet you, Kamado Sora.

Sora: Uh.......um......

Kagaya: I am Ubuyashiki Kagaya, the Master of the Demon Slayer Corps.

Kagaya: The woman beside me is my wife, Ubuyashiki Amane.

Sora: I'm Kamado Sora. Nice to meet you, Oyakata-sama, Amane-sama.

Sora politely bowed and he realized something is off.

Sora: Huh? Wait, what? It's just like, my body reacted on it's own......

Sora: Ugh, I've been thinking too many things at once.

Kagaya: Calm down, Sora.

Sora: This voice.....his voice is so calm.......

Sora looked directly upon Kagaya's eyes, and he noticed that they are white.......

Sora: Wait, is he what I think it is?

Kagaya: Amane, what does he look like?

Amane: A young man, with blue eyes, braided black medium length hair, a blue haori and a blue scarf, both fading to white and having flower patterns on the end of scarf and the hem of his haori.

Kagaya: I see. How old are you now, Sora?

Sora: 21 years old.

Kagaya: I see.

Kagaya: Do you know the reason why I called you here?

Sora: I'm confused.

Kagaya: I called you here, because I wanted to tell you about what happened during our Hashira Meeting and about Tanjiro.

Sora: Why do I have a bad feeling