The second book of I N S A N I T Y "I am my own demon." An unchanging despair is lurking. Vampires who are disguised as humans run rampant in the city. Living hidden everyday life, the existence of vampires, whose true identities are shrouded in mystery, permanently terrorizes the residents of the city. At the VH place, the sole institution that investigates and resolves causes related to vampires, Mikasa has been assigned a certain mission. She has been assigned to be a squad member, with her leader Adam. Mikasa's days of suffering begin? Will she remember who she was?