Nagisa has collapsed! Kojou rushes to the hospital, but suddenly a mysterious girl appears, and she looks just like Avrora, the former Fourth Primogenitor. She backs Kojou into a corner - but is she the real Avrora?
Through this encounter, Kojou regains his lost memories, what will he remember? Finally, Kojou’s past and the secrets of the Fourth Primogenitor are revealed!
COVER SUBJECT TO CHANGE