Iwahara, Yuji

Kasumi and the other survivors learn the truth behind the Medusa virus, but the knowledge does not make it any easier for them to survive and slowly they begin to turn on one another.

Kasumi, one of a small band of survivors who awoke too soon from a frozen state which was supposed to keep them safe until a cure could be found for a virus that turns its victims into stone, continues her quest to find a way off the island on which she has been imprisoned, and sets off with her companions into a half-submerged tunnel, not knowing what awaits them at the end.

The student council of Matabi Academy must step in when the line between enemy and ally begins to blur and the cat Spirit Beast Kaen moves closer to releasing the other Spirit Beasts, leaving Yumi, Kansuke, and their friends to fight an epic battle to save the world.

Yumi and her cat Kansuke confront a dangerous situation when Spirit Beasts infiltrate Matabi Academy, inhabiting the bodies of students and teachers.

Kasumi and the other survivors learn the truth behind the Medusa virus, but the knowledge does not make it any easier for them to survive and slowly they begin to turn on one another.

Kasumi and her twin sister, Shizuku, are infected by a virus that turns them to stone; but Kasumi, who was cryogenically frozen, wakes up to find herself in an unfamiliar world, and resolves to unlock the mysteries of the disease and the fate of her sister.