Tanjiro: World of Assassins

In this world, if you become an assassin it is said there is no way out. They are the biggest syndicate and they do not compose of not one syndicate family, but of 12, they are all over the world. There are rules that are to be followed, they are the only things that separate us from the animals. This world is kill or be killed, rules and consequences, a world of Assassins hidden among every one of us in every part of the world. Follow Tanjiro on his journey through the world of assassins, will he kill or be killed?

This story idea has been stuck in my mind, a friend of mine had an idea of this, his name is @DepSep64042 do check him out
If ya dont like the idea then don't read it!

May be a Tanjiro x Oc.
Might add other characters from Anime.
Just the world of John Wick only Tanjiro and KNY characters, and perhaps other anime characters.

Disclaimer:
I do not own this cover, it belongs to https://www.pinterest.ph/pin/185773553370430504/
I do not own Demon slayer and never will.
I do not own John Wick, and I should not be trusted with owning the franchise.