Blue Drop

Five years after a horrific incident on Kamioki Island left every other human dead, Mari Wakatake is the lone survivor—yet the ordeal stole her memories completely. Sent to a secluded girls’ academy against her wishes, she tries to settle into an unfamiliar life, unaware that someone is watching and waiting for what she’s forgotten to surface.

The truth buried in Mari’s mind may be even more unsettling than the massacre itself: she might not have been the only one to make it out alive. When a mysterious presence—wearing the guise of a girl—begins moving through Kaihou Academy, Mari is drawn to an enigmatic classmate who could be her best chance at answers… or her greatest danger.