Murza Melym fights alongside Chirico Cuvie, Byman Hagard, and Gregore Garosh in the Ex-Red Shoulder Battalion, a faction formed by veterans of the elite Red Shoulder military unit. United by their past service, Murza and his comrades embark on a personal quest for vengeance against their former commanding officer, Yoran Pailsen. This relentless pursuit drives the core narrative of "The Last Red Shoulder" OVA.