Devils' Line

Tsukasa Taira, a university student, discovers the existence of vampires when her friend reveals himself to be one. Vampires, who exist alongside humans in society, can be triggered into monstrous behavior by extreme emotions, despite not requiring blood to survive. Yuuki Anzai, a human-vampire hybrid, is caught in the middle of this struggle, and his complicated past with Tsukasa's friend sets off a chain of events. Anzai's feelings for Tsukasa grow, but his vampire side remains a constant threat.