In the cities, one can find mysterious beings known as "Witches" lurking about, whose singular goal is to create havoc among humans and transform them into their own kind. To combat this menace, the Suppression Corps, an elite government organization, has been formed to engage these invulnerable Witches using unconventional methods. Hensel Takamine, the chief of this group, harbors an intense hatred towards the Witches, imbuing his sword with the ability to exterminate them as he pursues retribution for his sister, who was a victim of these creatures.
