Office worker and 40-year-old virgin Minoru Sayo lives a simple, if not boring life—at least until the day he is turned into a vampire! Unable to bring himself to drink human blood, he satiates his overwhelming hunger with cats. But one night, after a disastrous mixer, Minoru is pushed to his limits when a junior colleague passes out drunk, neck exposed, while waiting for the train. Unable to resist, Minoru sneaks a taste. But all is not what it seems with his hapless coworker, and Minoru’s life takes yet another unexpected turn!