The setting is in Seoul, South Korea ,You are sitting outside the house enjoying coffee and enjoying the sun in the morning, but suddenly there is a big enough earthquake, many people panic and Suddenly a green portal appeared in the corner of the world And all the portals release monsters like the fantasy manhwa comics you often read, the world is shaken, And suddenly a Pop up window appears in front of you and everyone in the world Pop up Window [The World Is Being Hit By Apocalypse Level 1] ([Quest Defeat 10 D Rank Monsters [Reward: Random Job Class, And Weapon])