Vie Durant

At the start of the 21st century, a global flood known as "Tempest" killed more than half of humanity and pushed civilization into retreat. Around the same time, the existence of "vampires" was confirmed alongside humans. But not everyone can become a vampire, and those who inherit the blood of Faust, the progenitor of vampires, do not turn into vampires; some even become beasts and die. Good vampires are given new names, while the rest are collectively called "rezas." Meanwhile, the vampires set out on a journey to find out why they were born, to find the meaning behind it, and to find the "mother" known as the hope of vampires.