Saya Otonashi, a seemingly normal high school student, suffers from amnesia and she can't remember the past year of her life. One day, a man gives her a katana sword and she soon finds herself fighting the latest threat to humanity: Chiropteran monsters, ravenous immortal creatures that can change their form. They feed off blood and hide themselves within the human world. An organization known as the Red Shield has been waging a private war to wipe them out.

They are called Chiropterans, ravenous creatures that can change their form, disguising themselves as human beings. Immortal creatures that feed off blood, they hide themselves among us. An organization called the Red Shield has been waging a private war to wipe them out. Now the struggle has grown.

Otonashi Saya is a high-school girl who lives a peaceful life with her family. The only problem is, she has no recollections of her life beyond that of the past year. However, her happy life will be destroyed by an event that will lead her to her destined fate.

Saya Otonashi, a seemingly normal high school student, suffers from amnesia and she can't remember the past year of her life. One day, a man gives her a katana sword and she soon finds herself fighting the latest threat to humanity: Chiropteran monsters. They feed off blood and hide themselves within the human world. An organization known as the Red Shield has been waging a private war to wipe them out. Contains episodes 1-25.

Set several decades after the events in the popular Blood: The Last Vampire anime film, an amnesiac Saya Otonashi lives as a seemingly normal high school student with her adoptive family in Okinawa. However, her past is about to catch up with her. Chiropterans - powerful shape-changing creatures who crave blood - threaten humanity once more, and a mysterious organization called the Red Shield needs Saya's deadly sword skills to aid in the fight.

The deranged Charles takes center stage - and traumatizes Riku, Saya's sweet, adoptive brother. With only vague moments and memories slowly returning to her after a year as an amnesiac, Saya's still not sure why the confident, one-armed Charles is tormenting her. What she does know is that she's determined to hold her own against a small army of blood-craving Chiropteran beasts when they threaten her and her loved ones.

Hagi shows just how resilient he can be, Kai is as stubborn and reckless as ever, and confused, sweet Riku is once again in the wrong place at the wrong time. Speaking of time, this volume also features a longer flashback sequence that takes us to the 1800's and another violent episode in Saya's curious, catastrophic life! Saya faces her brutal tormentor Charles head on.

The dreadful Diva sends her Chevalier to kidnap Riku, Saya's adoptive brother, from the Red Shield's ocean-liner headquarters. New secrets from Saya's and Hagi's past lives are revealed as their present situation gets more complicated. Finding a way to make Saya go berserk and turn into a nearly unstoppable killing machine, Diva intends to pit her against her own friends and those she seeks shelter with... and this is just the first step in Diva's ultimate plan!

Three months after the demolition of Red Shield headquarters, Saya is more intent than ever on ridding the globe of all Chiropterans, and she travels to New York for a bloody showdown with Diva. When Diva sings, her supernatural sounds turn humans into hellish, bloodthirsty beasts... and what better place to start a Chiropteran apocalypse than Carnegie Hall?