Prologue

Demon Tanjiro AU

Is it wrong for a Demon to become a Demon Slayer?

Should another person decide the life of someone else?

This is not just a story of Hate or Revenge, it's the story of the creation defying its creator. A Demon King that desired Perfection, and a little boy who wanted to live in peace, with his family, who became the perfect being. A Demon not chained by sorrow, anger, or revenge, but a strong will to protect others, and offer them kindness on the way.

How many will he save?
How many Demons will he have to slay?

Tanjiro and Nezuko are swapped, with Tanjiro becoming the demon instead, but Tanjiro will be able to use Sun Breathing and will join Nezuko in becoming a Demon Slayer.