Lucille is an unemployed single woman living alone in her apartment, stewing in feelings of anxiety and inadequacy... but then without warning and due to a rather strange magical mix-up, she is summoned to be the new Demon Lord in another world! The demons aren't doing so well lately, and they're now relying on their new boss to return them to their glory days. Will Lucille be able to take this as an opportunity for a fresh start and thrive even in a world that wants her dead, or will she crumble under the pressure and return to her old shut-in ways?