On the verge of extinction, humanity has shrunk to the point where it now only exists in the city-state of Flandore, where people live in glass-encased cities. There are savage lycanthropes who flourish in the darkness beyond the domes, and there is a clear division between nobility and commoners among the residents inside. Nobles' blood allows them to use mana, giving them abilities that go beyond human boundaries and assisting them in battling lycanthropes. Noble Melida Angel, who is already 13 years old, has yet to manifest her mana and attends an elite academy where she is abused because of it. The Angel family orders Kufa Vampir to become Melida's instructor in order to assist her. While Kufa appears to be only a teacher,