The True Demon King {Re-write}

My AU is tanjiro being the true and only demon king through blood yes, some things don't make sense but just listen.

His father was the demon king, and he knew Muzan " The Demon king" but he was a fake demon king the demons he created were demons but with more weaknesses but they thought nothing of his nature because of his controlling leadership her persued.
Tanjuro knew the traitor stayed amongst the humans so he traveled there and only his eldest son or daughter can be the heir to the throne so tanjiro will be the new demon king on his adventure he meets many people, but his one goal is to kill Muzan and restore peace to both lands. Muzan was a traitor and always will be Tanjiro knew that.
find out what happens during the story this is also a ship fan fiction the ship is Tanjiro x Muichiro (the top being tanjiro for btw)

PS The ship will be later in the story where most of the climax is or the main part sorry to disappoint, I'll make the chapters long so you can all get more of the ship going 😄
my update schedule is not consistent I'm busy trying to many things to get ready to graduate this year so sorry!