This is the Masked Ballroom: a place where people revert to beasts, let go of reason,

and revel in freedom and anonymity. Here, with the help of a "monster supplement,"

anyone can transform into beasts and do as they please. It's the only "governmentapproved slum," where people can forget the suffocating atmosphere of the

surveillance state. It's in this city where Reiji, a young vampire and a real monster,

alongside his werewolf partner Tsuki, take on the task of keeping the streets clean.

They search for centaurs who have committed hit-and-runs and fight life-and-death

battles against the urban legends that manifest. And a meeting with the "Medicine

Witch" will change the fate of Reiji and his friends...