3rd POV. Ubuyashiki Estate.

Now that Sora regained his memories as an Uchiha.........

After visiting the ruins of his village, and the graves of his mother and brother.......

Sora became now more resolute in killing Muzan.

The deaths of his original family and his adoptive families. The people that suffered under Muzan's cruelty.....

A few days after Sora visited the ruins of his home village with Tanjiro and Nezuko, he once again parted ways with them and stayed at the Ubuyashiki Estate for the meantime.

From there, Sora slowly regained some of the gaps on his memories. Particularly on his brother.

He finally knew that his brother was a demon slayer. However, Sora is still wondering on what was he doing before Muzan attacked his home village.

The last Uchiha never bothered to think about it for now as it will be useless if he doesn't have any leads.

Sora asked Kagaya about his brother, Sasuke.

Kagaya knew that it is only about time that Sora must know the truth about his brother.

Kagaya: So, you finally regained your memories as Uchiha Sora.

Sora: Yes......

Kagaya: And now, knowing the truth about what happened back then......

Sora: Oyakata-sama, I want to know more about my brother.

Sora: What was he like when he was a demon slayer?

Kagaya: ........

Kagaya: Amane.

Amane, who is sitting beside her husband, hands over a journal to Sora.

Sora: What's this?

Amane: The last time that we saw your brother......

Amane: He was actually on Muzan's trail and.

Amane: He got a lead on Muzan's whereabouts and decided to inform us.

Kagaya: According to Sasuke, there is a news on your home village about missing civilians and members of the Uchiha Clan a few weeks before the massacre.

Kagaya: I guess it is best that you read your brother's journal for yourself to know it better.

Kagaya: If you have questions, feel free to ask.

Sora takes the journal from Amane, and he starts flipping the pages of his brother's journal.

Most the earlier parts are just about Sasuke's daily life with his family.

However, there is one information that Sora wanted to learn......

His father.....

Since Sora never knew anything about his father.

And finally, he got the information that he needed through his brother's journal.

Sora: My father, Uchiha Takehiro.

Sora: According to nii-san's journal, he is a man that is known for his kind personality, yet holding morality in the highest regard.

Sora: Strict yet wise. Some people doesn't like him because he wouldn't even hesitate call out other people, especially if what they are doing can harm the people around them.

Sora: In fact, he was one of the high ranking officials of the Uchiha Clan, just next to the Leader of the Uchiha Clan, Uchiha Fujisaki.

Sora: Like my brother and I, my father also possessed the Sharingan, he awakened it when our grandfather died.

Sora: In due time, our father also awakened the Mangekyo Sharingan, it was when my father's friend sacrificed himself from the threat of demons.

Sora: That incident scarred father for life, and so.....

Sora: He promised that he will protect his family no matter what it takes.

Sora: But despite all of that, father still has happy moments. When he met my mother, courted, got married, and build a family.

Sora: Until.......when I turned four....

Sora: My father died due to a unknown illness.

Sora: Since I was still so young to understand what was going on, I was still naive and my senses are just barely being developed, after all.

Sora: But what my brother noticed is that, father had a strange birth mark on the right side of his forehead.

Sora: My brother asked him about the birth mark and it was revealed that my father was born with the said birth mark.

Sora: Other than that, my brother and mother never knew about my father's condition that lead to his death.

Sora flipped through the pages and he saw the next entries are like the same as he knows about his brother.

But what intrigued him the most is his days when Sasuke was a demon slayer.

According to the journal, Sasuke was among the two survivors during the Final Selection.

The other survivor is none other than Uzumaki Naruto, my brother's bestfriend and rival.

They both worked together on missions and have great coordination. Climbing upon the ranks of the Demon Slayers at an astonishing rate.

Until one day, Sasuke met another Demon Slayer who is a fellow Uchiha.

Uchiha Shisui, a demon slayer whose prowess was said to be on par with the Hashira. He is senior of Naruto and Sasuke, as both are Tsuchinoto, while Shisui is a Hinoe during that time.

When the trio were assigned to hunt down a member of the Twelve Kizuki, the location was actually on the port city of Nagasaki.

That mission is a tragedy that Sasuke wouldn't forget. The demon that they faced during that time......

A member of the Twelve Kizuki, Lower Two.....

The demon is said to be able to control waters and turn them into ice.

The trio faced the demon and protecting the citizens at the same time, as the demon plans to massacre the people living in Nagasaki.

It is a hard battle, they never believed that such a demon wasn't even on the Upper Ranks......

Naruto, Sasuke, and Shisui fought the said demon to a deathmatch.....

Repelling the demon's blood demon art.....

But they are on a great disadvantage, as the city is the demon's territory.

At that moment, they knew it is a lost cause......

The demon already killed many people.....

As for the trio.....

Naruto lost his right hand, Shisui's eyes are already bleeding due to the overusage of his Mangekyo Sharingan.....

Sasuke is also severely injured......

Shisui and Naruto knew that they have to hold the demon off......

Until reinforcements arrived.....

And they asked Sasuke to deliver a message to the headquarters and send a Hashira.

But the message will take a while longer to be delivered as they are literally on the far end of the country.

They have no choice but to hold on. Their situation is a desperate one......

And they already resolved they will fight the demon until the end.......

But.....

Naruto, who was already orphaned because of how a demon killed his parents, and Shisui is also the same.....

Knowing that they don't have anything left to live for, they decided to charge at the demon straight, and told Sasuke to run away.

As they know Sasuke still has his mother, and his little brother. They knew that Sasuke had to live on.

Sasuke disagreed on this as they told his friends that their lives are also valuable. But the two protected Sasuke......

Sacrificed their lives in order for him to live......

Sasuke watched his two friends, die right in front of his eyes......

On that moment.......

Feeling of guilt and rage overflowed Sasuke's emotions....and thus he awakened the Mangekyo Sharingan.

Sora: The Mangekyo Sharingan!? My brother!?

Kagaya: Yes. He told us that he awakened it during that fight, when Naruto and Shisui sacrificed themselves just to save Sasuke.

Sora: Then......

Sora: How did I......awakened my Mangekyo Sharingan.......?

Kagaya: .........

Amane: .........

Amane and Kagaya went silent as they don't even know where to begin. They don't even know the reason why Sora awakened the Mangekyo Sharingan in the first place.

However, Kagaya explained how the Mangekyo Sharingan manifests to an Uchiha.

Kagaya: It is said that when an Uchiha suffers from a trauma of witnessing the death someone that is very close to them......

Kagaya: The Sharingan evolves into the Mangekyo Sharingan.

Sora: Then......

Sora: When nii-san watched the deaths of his friends from the hands of a demon.......

Kagaya: Yes.

Sora: I guess......

Sora: The same goes for me......

Sora: I awakened my Sharingan, when I watched my brother die in my arms.

Sora: Then, when I discovered the graves of my adoptive family.......

Sora: That probably lead to the awakening of my Mangekyo Sharingan.

Kagaya: ..........

Kagaya: No, that is not how you awakened your Mangekyo Sharingan.

Kagaya: Sora, the real reason why you awakened the Mangekyo Sharingan.....

Kagaya: Is connected to the Kocho Sisters.

Kagaya: How will Sora confront that traumatic memory?

Sora: ........

Sora continued to read his brother's journal and saw that his brother eliminated the demon with his newfound powers.

Amaterasu, the black flames that burns the target until nothing is left but ashes.

Then, the Susanoo......

The most powerful Mangekyo Sharingan ability that allows an Uchiha to summon spectral manifestations that is used for defense and offense, and a power that Muzan feared among the Uchiha.

Sora: So......Oyakata-sama, the black flames that your talking about.....that was my brother's........

Kagaya: Yes.

Sora: And the Susanoo.......

Sora finally remembered his brother's battle with Muzan. How Sasuke used Amaterasu and Susanoo on Muzan.

Sora: I see........

Sora: I finally remembered now......

Sora: My brother fought Muzan and used those techniques to fight off the Progenitor of Demons.....along with the Hinokami Kagura.......

Kagaya: .........

Sora: *sigh*

Kagaya: How are you feeling?

Sora: I'm.......

Sora: Just shocked that these memories are back to me..........

Sora: As much as I want to forget them.......I knew they will be a part of me.

Kagaya: Now then......do you still have any other memories to unlock?

Sora: I feel like there is still one memory........

Sora: Now that I think about it, the more I unlock the memories, the more I find the significance of the nightmares I'm having.

Kagaya: Can you tell me how are they significant?

Sora: Those nightmares, are like the most tragic parts of my life so far.........

Sora: The most traumatic events that I ever encountered......

Sora: Probably the reason why I......

Sora: I guess there is a reason now that my memories were wiped out.

Kagaya: ........

Sora: But until then.......

Sora: Until I find the remaining answers to my question......

Kagaya: Do not force yourself, Sora.

Sora: Thank you for the concern, Oyakata-sama. I will take my time in regaining my memories.

Sora: And the fact that I learned something new, like my brother when he was a demon slayer, how he awakened his Mangekyo Sharingan......

Sora: My father, Uchiha Takehiro.......

Sora: Now, I fear that whatever the remaining memories that I need to uncover........

Sora: I think they hold the darkest moments of my past......

Kagaya: Are you willing to face that dark past?

Sora: To be honest, I'm afraid.......

Sora: But........

Sora: I have to.

Sora: In order to learn who really I am.......

Sora: To find my purpose.......

Sora: I know I already knew my purpose, for whose sake that I decided to take up my blade and fight.

Kagaya: .......

Kagaya: Then, I pray that at the end of your journey........

Kagaya: I do hope that you find peace in your heart and mind.

Sora: Thank you, Oyakata-sama.

Sora quietly left the room, leaving Kagaya and Amane alone.

Amane: .......

Kagaya: How is the investigation on Uchiha Madara?

Amane: Unfortunately......the crows that I sent to investigate......they haven't come back.

Kagaya: .........

Kagaya: I have a bad omen about this Amane.

Amane: A bad omen? Did you see something?

Kagaya: It's about Sora.......

Amane: What about Sora?

Kagaya: I feel like.....it will only be a matter of when.......

Kagaya: Amane, we have to find Uchiha Madara. Now that were nearing on Sora discovering the final fragments of his lost memories......

Kagaya: The more I'm inclined to conclude that Uchiha Madara was involved in Sora's disappearance two years ago.

Amane: Then what should we do then?

Kagaya: We have no choice......

Kagaya: I'll send Kanae and Shinobu to further investigate about Uchiha Madara.

Amane: What!? Kagaya......

Kagaya: I know, but Shinobu is the one who encountered Madara during their mission.

Kagaya: I'm sure, the two of them are much stronger now.

Amane: .......

Amane: *sigh*

Amane: All right.

Amane: I do hope that you're right about this.

Kagaya: Shinobu and Kanae must find the whereabouts of Uchiha Madara. The location where the crows disappeared........

Kagaya: I sent a crow there and I was given a report that a demon is also lurking nearby the said location.

Kagaya: So, the threat of demons are prominent in the area, where we suspect Madara is also hiding.

Amane: What are you planning to do?

Kagaya: We'll draw out Madara from his hiding place. If Shinobu said that Madara is still capable of fighting even he is already past his peak......

Kagaya: Then we'd better capture him and interrogate him about what he knows about Sora.

Kagaya: If Madara was the one behind Sora's nightmares and what does he intend to do with Sora himself.