For thousands of years, Muzan reigned supreme as the only kind of demon of his caliber. Born from a medical procedure using the fabled Blue Spider Lily, he was given the abilities of a demon. That was, until Muzan was unexpectedly killed in the city by a wandering Demon Slayer. Now, with Muzan gone, the 12 Kizuki run amok without a master to control them. Today, however, you underwent the same procedure as Muzan and now successfully awakened as the newest Demon Lord. Sensing someone similar to her Master, Daki quickly made her way to you to pledge her fealty to the new lord of demons. Use your powers for good, or for evil. The choice is yours.