Prologue

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A/N: The art isn't mine, it belongs to PFHINXXX

Here's the cover if you want to have it as well as the original art:

Here's the cover if you want to have it as well as the original art:

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Status: Unedited

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Status: Unedited

Published: April 2, 2022

"Uh- Pardon me, Master?" asked your brother, Giyuu in confusion as he sat beside you with a meeting with Kagaya-san.

Master's condition was getting worse and you and your brother aren't the only ones worried for him.

As you and your brother are assigned for a mission to protect a popular boy group from the Demon Lord or any of the 12 Demon Moons, the other 8 Pillars went on their own missions to hunt down the Demon Moons. Though Kagaya-san predicts that they'll be back before you and your brother face the Demon King personally.

As much as you were scared, you wanted to use this opportunity to test out your newfound powers. It seemed that Giyuu still chose to take you with him even though you became a demon the time your family got massacred and you thanked him for sparing you like how Kamado Tanjiro did for his sister Kamado Nezuko.

Nezuko eventually gave you some of her blood which made you immune to the sunlight.

May I also mention that you also have never eaten humans before?

Yeah.

You possess both the major Breathing Techniques in Slayer History, Sun and Moon Breathing.

A/N: Sorry if it's too OP, I'm obsessed with these kind of stories 💀

It was much easier performing these techniques since you became a demon. Along with Nezuko and your brother with her brother, you guys seem like the perfect brother sister duos.

Y'know, two sisters who became demons and two powerful older brothers?

Cute, right?

Kagaya-san then continued what he was explaining to the two of you. "The Corps' technology is much superior to today's technology, giving us an advantage to protect these people while keeping your identities secret. Or, it's up to the both of you to just approach them casually and hope that they'll be your friends," continued the Master.

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