The youthful half-vampire Yuki Anzai and the student Tsukasa Taira meet in a world where vampires coexist covertly with humans—a meeting that will radically upend their lives!
When a fellow student turns out to be a vampire and nearly bites Tsukasa, she unwittingly learns about vampires. This is due to the fact that vampires can have an endless bloodlust when enraged even if they are not required to consume blood. Fortunately, Yuki, a member of the police's vampire-fighting team and a vampire-human hybrid, saves her in time. The two start to develop an irrational fondness for one another, and soon it seems as though their fates are even more interwoven.