Strike the Blood, Vol. 7 (light novel)

Nagisa has collapsed! Kojou rushes to the hospital,but suddenly a mysterious girl appears, and she looks just like Avrora, theformer Fourth Primogenitor. She backs Kojou into a corner--but is she the realAvrora? Through this encounter, Kojou regains his lost memories, what will heremember? Finally, Kojou's past and the secrets of the Fourth Primogenitor arerevealed!