MARS RED takes place in 1923, and vampires have existed for quite a while. But now, the number of vampires is increasing and a mysterious, artificial blood source called Ascra has appeared. The Japanese government, in turn, creates “Code Zero,” a unit within the army tasked with taking down the vampiric forces. And what better way to track vampires than by using vampires? 
 
Created by Lieutenant General Nakajima, this unit has historically been in the business of information war, but has been re-assigned to solve the vampire crisis. It's up to Code Zero and the S-class vampire Deffrot to investigate this increase and put a stop to it before society crumbles. (Source: Funimation) 
 
Note: The first episode premiered on Funimation on March 29. Regular broadcast started on April 6, 2021.

Episode 1 - Dawn

Episode 2 - Till Death Do Us Part

Episode 3 - His Dream

Episode 4 - Unknown Song

Episode 5 - Persona Non Grata

Episode 6 - The Last Blue Sky

Episode 7 - The Letter

Episode 8 - Purgatory

Episode 9 - Suspicion

Episode 10 - A Midsummer Night's Dream Gone By

Episode 11 - Dark Wings

Episode 12 - King of Fools

Episode 13 - Frailty, Thy Name Is...

Signal.MD

Yomiuri TV Enterprise

Funimation

Pony Canyon Enterprise

D-techno

Nihon Keizai Koukokusha