Tsukasa, a college student, is rescued from an attack by a devil, one of many vampires that can blend in among the human population. Anzai, her savior, is a half-devil who exploits his supernatural gifts as a member of a shadowy police task force that specializes in devil-related crime in Tokyo. As Anzai continues to keep guard over Tsukasa, the two quickly forge a tentative bond—one that Anzai fears will test his iron-clad rule of never drinking human blood…
Anzai, thanks to his reawakened memories from his childhood, is called in to the MPD to give a statement on Kikuhara. After the dissolution of F Squad, Jill struggles with a sense of being unmoored. Lee has gained a reputation as a bit of a devil-hero, but shadowy figures from his past start to catch up to him. And deep in the forest somewhere in Gunma Prefecture, Makimura opens his eyes…