The second volume of the Mars Red manga revealed that it will reach its climax in its next volume, which will therefore be the third volume.
Synopsis
MARS RED takes place in 1923, when vampires have existed for quite some time. But now, the number of vampires is increasing, and a mysterious source of artificial blood called Ascra has appeared. The Japanese government, in turn, creates "Code Zero," an army unit tasked with taking down the vampire forces. And what better way to track vampires than to use vampires?
Created by Lieutenant General Nakajima, this unit historically operates in the field of information warfare, but has been reassigned to resolve the vampire crisis. It's up to Code Zero and the S-class vampire Deffrot to investigate this increase and end it before society collapses.
It's worth remembering that the work has an anime produced by Funimation that is currently ongoing.
The Mars Red manga launched in Monthly Comic Garden in January 2020.
Source: ANN