Earth, Japan Taisho era (Demon Slayer fanfiction)

Japan has been plagued with man eating demons and their Blood Demon Arts have terrorized it for a thousand years only two things can kill them the Sun any sword made from a certain metal that is welded by a person from the demons slaying core love hunted down demons throughout the centuries. Almost all demons stem from the first Muzan Kibutsuju

Feel free to create your own character or take a pre-established character

Due to having more males characters compared to females gender bender warning is in effect for those who have a hard time seeing male characters females, here's a link that has a few gender bent pictures. It is not a full index of demon slayer characters genderbent https://www.wattpad.com/amp/1107217027

Another good example of the main three male characters is a porn comic by meow with me who pretty much makes exclusively gender bender at least that I know of