![](https://cdn.animecharacters.io/images/anime/large/16523-f6ad0fa7.jpg)
Format
TV
Episodes
13
Episode Duration
23 min per ep
Status
Finished Airing
Premiered
Spring 2021
Aired
2021-04-06 to 2021-06-29
Source
Other
Rating
PG-13 - Teens 13 or older
Genres
Action
Historical
Vampire
Supernatural
Military
Adult Cast
Studios
Signal.MD
Producers
VAP
Yomiuri TV Enterprise
Pony Canyon Enterprise
D-techno
Nihon Keizai Koukokusha
Licensors
Funimation
Mars Red (MARS RED)
In the year 1923, a vampire crisis takes Tokyo by storm. Provoked by the illegal trade of "Ascra," an artificial blood source, the population of vampires begins to rapidly increase within the city. Under orders from Lieutenant General Sounosuke Nakajima, the Special Forces Unit 16 gathers vampires within the military to create a new undercover vampire-hunting unit known as Code Zero. Leading the unit is Colonel Yoshinobu Maeda. Responsible for locating the source of the Ascra trade as well as capturing and killing vampires, he is pressured into producing fruitful results amidst the growing criticism that threatens to decommission the unit. To make matters worse, the vampires within the unit are struggling to grasp their newfound powers and identities now that they are no longer human. With the world at odds against them, the members of Code Zero must find a way to curb the crisis or otherwise fall victim to their own demonic natures. [Written by MAL Rewrite]