The Moon's Descendant (Demon Slayer x Male Reader)

Your family are descendants of Kokushibo and your great grandfather discovered his books about Moon Breathing. No one in your family could fully adopt it and so far you're the closest to it with your Night Breathing. Will you discover the secret to Moon Breathing? Will you become a Hashira?

Disclaimer: I don't own Demon Slayer/Kimetsu no Yaiba or any of the characters, except for my oc's.
Also your family will not die.