Tsukasa is confronted about her relationship with Anzai. Meanwhile, Anzai must get his demonic side under control when the call comes in to deal with an emergency.
Tsukasa, a college student in Tokyo, is attacked by a devil (vampire), a creature that exists and lives amongst humans. She is saved by Anzai, a half-devil, half-human who works in a special police force that specializes in devil-related crimes.