Continuing from the previous series, The moon is beautiful tonight, but first, die, delves into the ultimate battle faced by Kamishiro and Hanazono. As they confront not only formidable adversaries but also their once-trusted companions, they strive to rescue Hanazono from a dire destiny and seek a remedy for the lethal bloodlust affliction known as ID, compelling the infected to crave the demise of their loved ones.