Winter Sleep

Humanity suddenly falls into a winter hibernation for an unknown reason. In order to minimize social losses, a "hibernation period" of humanity occurs where everyone hibernates and wakes up. Seo-Woo, who does not hibernate, spends the hibernation period every year with people like himself. And hibernation as usual. This time, something is different. While people are sleeping, strange things are happening. (Source: Naver, translated)