Kusanagi Shuuma is just an ordinary boy...
Until the day he is suddenly abducted by a mysterious girl named Iris. She reveals to him a hidden secret about his birth...
Coursing through his veins, Shuuma has a special kind of blood – vampire blood passed down from his progenitors. Iris is known as a "ringleader" vampire who also has this ancestral blood. Her destiny: to "awaken" Shuuma.
In his attempt to flee her clutches, Iris pounces on him to finish the embrace! Luckily, at the very last moment, the keepsake ring given to Shuuma by his mother emits a blinding light that interrupts her vicious attack.
Shuuma breaks free and escapes from Iris, but soon realizes something inside him has gone amiss. Could he have become an odd, partially-turned vampire? Now, many girls are entering his life from many directions and complicating the situation. To make matters worse, he is plagued from an overwhelming impulse to suck...
...their blood.
