Kaoru and Kaori are superpowered twins, the product of an unhinged, unethical maker. Their shadowy past merges with Hitsugi's own origins, a burden she carries as heavily as the coffin on her back. But Hitsugi is breaking free of her past and committing herself to do Black Label's good work. The first order of business: wiping out a pair of red-haired blemishes on the face of the city!