When I Was in the Wasteland

What should I do if I travel to a wasteland-style world? Of course, I have to find a way to survive. The days of fear are too scary. Farming and eating melons is what suits me. How did I travel through time? A ray of light passed by and everything in front of me was desolate. "This is the Earth 400 years from now." "Then can I still go back?" "Sorry for insufficient permissions." What is that monster! Don't come here! "The host is detected to be in danger and the system starts to activate. The system activation is complete, please keep the host alive. " This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.