Flooded Mainland: I Fish for Supplies in a Residential Building

This is a flat continent, the environment has collapsed, the temperature is out of control, and the end of the world is coming as expected. Strange rains sweep across the earth all year round. Acid rain, blood rain, thunder, lightning, rain and snow alternately wreak havoc, and water levels continue to rise. Human beings can only survive by building buildings. Under the calm but bottomless water, unknown beasts roam rampant. The only way to collect supplies is fishing. The moment the hook is lifted, materials and monsters are always a life-threatening unknown.