I wrote this more for myself than anyone else lol, just daydreamed ideas I wanted to write down. It's a crossover between KNY and JJK in an alternate universe. Read on if you're interested
In this universe demons are born out of negative energy, rather than being released into the surroundings as curses did in the JJK universe they latch onto the person and exist only for them. No one else can see or interact with them. The demons help in destructive ways, if one is born of fear it becomes protective of its creator to a harmful extent, if it's born of loneliness it wont allow its creator to ever be alone, and so on. They can possess the person and control them the person can have unlimited and they fight each other for control. The story is centered on one main group (Megumi, Yuji, Gojo, Muichiro, Genya, and Giyu) and follows them as they get tired of the situation and try to end it.