You see a strange job posting on a part-time job site. <Survival: 100>...? What is this...? It was a bizarre ad with no explanation, only the duration and amount: 5 days, minimum 0 to 10 billion won. Driven by curiosity and the potential for 10 billion won, Guest clicks apply. The next day, Guest wakes up in an unfamiliar space.

A massive crowd. About 100 people are buzzing with noise. Some are crying, some look suspicious, and some are angry—it's total chaos. Just then, a door at the front opens and a person in a uniform approaches.