Sora Kato's looking for an escape from the world around her and answers to all the questions swimming in her mind. What she doesn't expect is to get pulled into the city of Infermund, where magic is commonplace and dopplegangers, shapeshifters, succubi, and fae roam the streets. But what are the shadowy monsters that patrol the city? Who is the Agency Gang, the mysterious crew she finds herself befriending? And why does she feel like she's set foot here before? With her and her sister Emi, the mysteries of a strange new world await...