Ibara no Ou

"Medusa," a deadly virus becomes a worldwide epidemic. In order to escape from this deadly virus, a handful of people are chosen to be put into a cold sleep, laying in a capsule hoping for the future cure. Kasumi, a teenage girl is one of the 160 chosen for this procedure, and is guided to a Cold Sleep Capsule Center (CSCC) inside an ancient castle. Understanding that it is hardly possible, Kasumi goes to sleep still anticipating for a reunion with her twin sister Shizuku, who also is infected with the virus. As Kasumi and the others awake, they notice that the CSCC is not as they remembered. Just like the story of "Sleeping Beauty," the castle is covered with thorn, and the awaken are attacked by unknown creatures and monsters! How long were they asleep? Where did the monsters come from? What has happened to the world? Abandoned in the midst of an enigma, the escapade of the seven survivors begins... (Source: kingofthorn.net)A mysterious virus, nicknamed Medusa, is spreading around the world, turning its victims into stone. Given the impossibility of finding an immediate cure, a corporation offers to cryo-preserve a select group of patients until they come up with a solution. Kasumi, one of the chosen ones, wakes up after being asleep for an unknown period of time and her awakening, not a bed of roses, is a bed of thorns, and happens in the midst of total chaos where monstrous creatures lie in wait all around.