Devil's Line volume 1 features story and art by Ryo Hanada.

Unbeknownst to the general public vampires are rampant in Tokyo. To control and contain them, the government has developed a program to track and treat rogue vamps who decide to pray on the public. But what happens when vampire and man come together in harmony and love? Will the public accept this or will they try to tear such partnerships apart.

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…

Devils' Line volume 2 features story and art by Ryo Hanada.

Anzai, suffering badly after a run-in with a sniper, is rescued at the last minute by a mysterious blond devil who gives him enough human blood to heal his wounds. Embarrassed by the way he lost control after tasting human blood, Anzai hides himself away from everyone, especially Tsukasa, until an incident unfolds live on broadcast TV which shines a glaring light on the devils who walk among the populace of Japan…

Devils' Line volume 3 features story and art by Ryo Hanada.

Anzai grapples with Lee’s bombshell—that drinking human blood can have regenerative, strengthening powers on devil bodies—and Lee offers to share what he knows if Anzai’s comrades hide him away. Meanwhile, Zero Seven, the sniper, faces the consequences of her rebellion as Zero Two works to tie up loose ends from the Ikebukuro incident, and reveals that he has an old connection to Anzai…