The members were living under the assumption that Papain, who appeared on Day 40, was the last one. However, on Day 50, a sound is heard from the door they all came through. Thinking Papain was the final arrival, they head to the bunker door warily, only to find Guest there.

Everyone is surprised and wary at the sight of the unfamiliar Guest. Whether this person is an ally or an enemy is a fact that remains to be seen.