Rencarnation Room {Other Story line}

A soft grin formed on Kagaya's face when he heard that El's goal was the same, with the goal of forming a demon extermination army.

"Well, I congratulate you on joining as one of my children in the demon extermination corp. Actually, I wouldn't mind making you my daughter-in-law either." Kagaya said casually.

"Huh?" El looked at Kagaya quickly and tilted his head slightly in surprise. "What does that mean?"

"I feel Kuina and Kanata are interested in you. You can wait another 10 years so you can marry them. It's not bad to have a son-in-law who has a connection to 'that place' is it? After all, people from that place can never age." Kagaya explained it with a bit of mockery and very casually.

At that, El could not understand the thoughts of the person he was talking to at the moment.

If he recalled, when the two of them drove to meet their father, sometimes Kuina and Kanata would steal glances at El.

For some reason, El felt a red and cold stare on his back. A feeling of unease and insecurity. Instantly, El looked around vigilantly.

However, El couldn't find anyone his around, other than Kagaya and him. El's sudden behavior of looking around his made Kagaya feel a little curious.

"No, no, my answer is no!" El said firmly rejecting Kagaya's proposal.

Kagaya sighed, "What a pity, both my daughters were rejected."

Then, El turned around and immediately wanted to leave Kagaya. If he lingered any longer, Kagaya might nominate all of his daughters, or even worse, his son.

Of course, El didn't want that to happen. El was a normal man, not a Lolicon or Shotacon, nor a Bl. Although El was proud to be single, his ideal type of woman was a woman who was already 23 years old, slender, with long hair, kind and diligent.

For the rest. Like being good at cooking, El doesn't really need that because as the eldest brother, he is an expert at cooking food.

"If that's all there is to talk about, then our talk is over." El said, preparing to jump onto the roof and leave immediately.

"Ah, before leaving, are you interested in becoming Hashira? I thought, your goal was related to the rank of Hashira." Kagaya asked with seriousness in his tone of voice.

El turned to look at Kagaya. A sharp grin appeared on his face. "Interesting, I accept your offer on this one. So, from now on I am the demon hunter Hashira."

Then, El slightly lowered his body position. In the next second, a distorted image of his self was created, El suddenly disappeared from where he stood, as if swallowed by time and space.

Kagaya turned around, looking at where El was standing before. A sharp, cutter-like grin was painted on his expression that was soft as an impending storm cloud.

"Ever since the one with the strange eyes appeared in this world, the fate of the world has been determined by what he chooses." Kagaya muttered looking at where El was standing.

Suddenly, old memories of when his entire family was still alive flowed like a waterfall. At that time, his father was also still alive and had not gone mad due to the responsibility of the demon hunting squad's death.

Back then, his father had said a prophecy to his family. Kagaya still remembered the prophecy very well until now, but didn't fully understand it because he was still young.

Until now, Kagaya didn't really understand. However, once he got the news from Crow Karasu that a person with physical features such as strange eyes appeared in the final selection, Kagaya finally understood the meaning of prophecy.

Kagaya and the other members of the Ubuyashiki family had a high level of foresight, which helped them avoid disastrous situations and accumulate a lot of wealth and treasure.

Because of this ability, Kagaya accurately made several guesses about many things that eventually proved to be true and accurate without his knowing any information beforehand.

That's why, Kagaya's father Ubuyashiki was able to have some information about El's existence in the past, long before El's arrival to the world of Kimetsu no Yaiba.

However, that information was limited to El mysteriously appearing and disappearing from this world, the destruction and triumph of the demon hunting army and his unchanging appearance.

But, with the keen intuition of Kagaya's father or the rest of the Ubuyashiki family, getting that information was enough to make some random yet accurate guesses.

First, from El's mysterious appearances and disappearances, El must have come from somewhere, perhaps something like another world that could not be reached, including Muzan.

Secondly, the destruction and triumph of the demon extermination army must be related to El's original purpose of coming to this world.

Third, an appearance that could never change, meaning that El could never age. Coincidentally, that was Muzan's purpose for becoming a demon.

From all of that, a random guess about the existence of 'that place' came from.

***

The moon in the sky was bright, the path with hundreds of hectares of rice fields around seemed very quiet. At that place, El was walking with a complicated expression on his face.

El didn't expect that it was Kagaya Ubuyashiki's destination to meet his. Fortunately, Kagaya didn't pry the existence information about the Rencarnation Room any further.

Or El would have acted stupidly, like killing Kagaya right away, indirectly confirming his family's random guess.

Although he couldn't get information about the existence of the Rencarnation Room and the Beyonder for free, Kagaya was able to set up some small traps that El accidentally leaked.

Given, Kagaya Ubuyashiki in the manga has a cunning nature, so he can trap Muzan in his plans. Although, most of these plans can be carried out because of Muzan's stupidity.

"That was very dangerous. It's a good thing I didn't have to kill Kagaya." El muttered with a worried and complicated expression.

Then, El took as many breaths as possible and sighed from his mouth. "Alright, revise the plan for the future. As soon as possible I will complete all the main missions."

"Ignore the first main mission and get the Demon Slayer Mark, as it might be more potentially dangerous." El said so with a cold expression.

''It's best to complete the second through fifth missions. So, my destination now is Asakusa city to buy some injections and slightly ask for the blood of Tamayo and even Yushiro." El immediately stopped walking.

Then, El inhaled as much as possible and suddenly the air around his mouth seemed to heat up, until it burned.

Slowly, his lungs floated. And his heartbeat pounded extremely hard, pumping blood that carried most of the oxygen to the rest of the body.

This causes El's body temperature to rise dramatically, making the muscles and bones become more energized.

"Gen'nichi Kō!" With one high-speed footstep, El's figure was distorted. Making El disappear without a trace as if space had swallowed up his existence.

~*~*~

I tried to make Kagaya able to communicate easily with the other person and a bit of crunchy comedy, so that in the world of kimetsu no yaiba, El is not too serious. I hope you like it