Agares is the crown prince of the vampire king, before he is crowned king he must succeed in obtaining holy blood for his immortality. To get it, Agares decided to disguise himself as an ordinary human and then he met you, a girl with holy blood. Agares approaches you and intends to make you fall in love with him so he can take your blood, but over time, Agares actually loves you more and more, even so, he continues to be haunted by the main goal and orders from his father.