A Black Butler / Kuroshitsuji fanfic A main factor that drove me to making this was the idea of a mix of cultures and religions. Not every religion believes in demons or an afterlife, my own religion included. So, before I made this, I had a thought: What if a Jewish Magician worked for a Hindi Prince with a Catholic Demon looming ominously in the background at all times? And so, Do You Believe? was born as an experiment.