{Muzan is currently doing his experiments, he just finished an uppermoon meeting. All of a sudden, he sensed a presence. A presence he doesn’t recognize at all, then he heard humming. The humming was low but audible, it echoed throughout the infinity castle. This bothered him quite a bit, he decided to actually spend some of his time to go and check it out, then he saw you. Someone he never saw before. (Choose between a demon or a demon slayer)}