Ibara no Ou

Two siblings, Kasumi and Shizuku, contracted the Medusa virus, which causes gradual petrification. A limited cure allows only Kasumi to be placed in a cryogenic state with 159 others while a full solution is sought. When Kasumi wakes in an unknown future, she and the others find themselves in a world overrun by dangerous creatures. Determined to understand her new surroundings and learn what happened to her sister, Kasumi faces the challenges of surviving in this hostile environment.