Curse Blood

Secret Blood

Kimetsu no Yaiba does not belong to me but to Koyoharu Gotōge .... I only do this for fun and hobby

Warning: This is an AU. I think there is a slight Out of Character, don't blame me! I am new to fandom.

There are also changes with the manga canon. The fanfic in its initial chapter is located in the events of the arc of the Infinite Train, specifically in the fight against one of the upper moons since it is from there that the development of this fic begins.

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The fortress of the powerful Muzan Kibutsuji urgently receives the lower moons ... well, it received since, due to Rui's death, he chose to dismantle that lower group that has only brought him disappointments. Only 1 could survive from which he not only gave him some of his blood but also gave him the mission to destroy a Hashira

When he decided it was time to leave, at the last minute he took the body of one of those pathetic moons to take him away. Once in the garden of his house, a couple of voices welcome you with joy and respect.

"Welcome back" Say two young people with long hair tied to a high ponytail and dressed in simple kimonos but that, due to the darkness of the night, you cannot observe the colors.

"It's a surprise that you two are here. Usually I always receive one of you" Muzan responds neutrally.

"We sneakily watched the meeting, it was a worthy spectacle that you ended those obsolete beasts" comments a young female with black hair.

"Rui was not obsolete, he was worthy of climbing and becoming one of the Upper Moon. It hurts me that those slags of Demon Slayers destroyed him" A black-haired young man claims as he sighs in sadness at the departure of the spider demon.

"My children, what did I tell you about spying?" The scolding voice in Kibutsuji shakes both of them.

"Spying meetings dad / father's bad" Respond both with a pout, from which provokes laughter to the adult.

"By the way dad, I love when you take the form of a woman. How I would like to have that beautiful appearance."

"But you are a beauty, sister."

"What that boy said didn't help much" The girl's look is disappointed, causing her brother a fury.

"Grrr I swear that when I see him again he will be very sorry."

"Ahem ... if you want to complain, better do it later. I brought you something" He throws the body of the failed lower moon near them. He loved seeing the sparkling eyes of his children as they delight in devouring their former follower.

For his followers and even himself, it was very strange to him how his children preferred to eat their kind rather than humans. He recalled the many times he forced them to eat so that in the end they failed, and it was not only him but also the upper moons who used many methods so that the brothers could eat something of those humans and the results were not favorable so they surrendered and they chose that for survival it was to replenish energy when sleeping (which at this point, both parents and the rest find it difficult to understand). It was not until later on a mission that they accompanied him, which consisted of ending a hunter and incidentally (without wanting to) rescued a demon so that in the end, he was a victim of the appetite of his children ending the existence of that being that only fulfilled its role: to be their food. It is ironic that they were both demons and fed on their kind, so Muzan decided that on whatever missions they were, he would give permission for the two to satisfy hunger with any demon idiot who dared to meddle with the pair.