In an ordinary summer vacation, four girls, who are roommates and friends, travel to country M together. But the next day, they learned from the news that an unknown virus broke out on a large scale in the Dragon Kingdom, and the virus quickly spread throughout the world. People infected with the virus will be resurrected after death, but they will completely lose their human consciousness and become monsters that feed on flesh and blood. The weather around the world has also suddenly turned from sunny to cold, and what should have been a hot summer has completely turned into an eternal winter. Can the four girls in a desperate situation survive to the end?
Concept: Their power can cut through the darkness