The life of a boring salaryman-turned-vampire gets turned upside down by handsome coworker who's just dying for bite! A scrupulous vampire happy with his mundane life finds himself perpetually tested by his bored--and very unscrupulous--coworker. Minoru Sayo, a boring office worker turned reluctant vampire, is hit by a train while trying to protect Yamadera, his psychopathic junior colleague who is dead set on doing whatever it takes to become a vampire, including jumping in front of a train! The damage to Minoru's body has a very unfortunate side effect --it further awakens his vampire instincts!.