Kokushibo x Non Binary Reader

You are a demon slayer, not a hashira, but you're good at what you do. You don't enjoy killing the demons, since they were once humans. One day you get called for a mission, however will this be your final act, or will the show go on, as a legendary upper moon finds you in the forest. Will you save the last bit of humanity left in him? Your fate rests in his tainted hands, but maybe you like the feeling of being in danger.