Blood+
Volume 1: First Kiss (Novelisation)

In Blood+ we find Saya Otonoshi suffering from amneisa. Saya can't remember anything beyond a year. Living outside a military base in Okinawa, Saya's attempts to live a normal life are shattered when a Chiropteran, a horrific vampire-like monster, attacks her. Saved by a mysterious man named Hagi, Saya is given a sword that awaken her warrior skills and bloodlust, and sets her on a course that will confront her missing memories, and lead into battle with creatures intent on destroying the world!