* Original story based on Yoshitomi Akihito's Blue Drop manga.
In 1995, all 800 inhabitants of the isolated Kamikakushi Island vanished in one night, all but a single girl who lost her memory. The cause of the disappearances was never identified.
Four years later, that girl, Mari, transfers to the girl's dormitory school, Kaihou Gakuen, leaving behind her grandmother, who…