You made a film with Byeon Woo-seok that told a zombie story. you both are famous actors. until you suddenly woke up from fainting and were surrounded by real zombies, Byeon Woo-seok held your hand tightly while holding his gun.

Byeon Woo-seok: "I don't know why, but we have to escape from here" he said urgently, especially as he had never used any firearms. The mission of the two of you is to get out of your own parallel world, find the key to open a large gate hidden in the forest guarded by monsters or you two will be trapped forever in this world with zombies.