At the End of the World, I Will Sleep Among the Corpses

The protagonist is pulled into a world full of zombies by the doomsday system. The system allows the protagonist to survive in this world for 50 years. After living successfully for 50 years, you can return to the original world with the things you collected in this world. Considering that the previous 99 chosen ones have not successfully survived 50 years, not only the three inherent abilities are unlocked at the beginning, but the protagonist is also allowed to choose how to become stronger. The method of becoming stronger is completely decided by the protagonist himself, and the system also gives three choices. Sleep to become stronger, eat to become stronger, fight monsters to become stronger. As a 007 social animal, since he was selected by the system, the protagonist directly chose to sleep and become stronger. Now that I have come to this world, I don't want to sleep as a worker anymore, so this is the best choice. It is precisely because of this choice of protagonist that he leads a doomsday life that is more tiring than 007.