Kaibutsu Chuudoku

is a Japanese light novel series written by Mikawa Ghost, with illustrations by Miwano Rag. The series began publication on September 10, 2022 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
'''More than monsters and less than humans. The dark hero of the new era runs through the city of desire!''' People return to beasts, unleash reason, and enjoy freedom and anonymity. "Masquerade Street". A city where anyone can casually transform into a beastman by drinking "Monster Supplement" and do whatever they please. It is the only state-approved <> where you can forget the suffocation of a complete surveillance society. In such a town, a vampire boy who is a real monster, Reiji, and his partner, a werewolf, Tsuki, are undertaking "vermin extermination" as a town cleaner. A search for a hit-and-run centaur, a JK Bunny hunt, and a deadly battle with a manifested urban legend. And the encounter with the "Witch of Dispensing Medicine" will change the fate of the Leijis greatly. "This is the story of boys who continue to fight in a city where authenticity and counterfeits are mixed up." The overdose action that overdose is prohibited begins!