Once the King (KNY Fanfic)

He was once the King of Demons, after a century of ruling a brave but malevolent demon who set out to dethrone the ruler. As a fight raged on the ruler's father cursed all demons to burn when they sit under the suns light, in doing so he had perished.

The demon was successful and over threw the king, the king with his family had to live in the shadows of the human's land and watch as the title demon was change into the opposite of what he had wanted.

I do not own Kimetsu no Yaiba nor the characters in it.
I as well do not own the images used for the cover.
Credits to both the owners.