Devils' Line 1

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...