Natural Disasters: Starting with a Mountain, Stockpiling? Farming!

"This is a farming novel. [Natural Disasters + Farming + Hunting + Fishing + Culinary Delights + Grasslands + Deep Mountains + Herding + Healing + Non-traditional Apocalypse + Seclusion + Daily Life + Sweet Romance + Childhood Friends] Only two people seclude themselves in the forest (key point! The entire story focuses on trivial yet heartwarming daily life—growing vegetables, farming, raising chickens and geese. No cheat abilities, purely self-reliant for food and clothing. Heads-up: There is a CP (couple pairing). The protagonists' relationship is initially awkward and slow-burning. They are growth-oriented characters, not one-dimensional stereotypes. No outsiders, no dark human natur...