Flood Apocalypse, Surviving with My Sister-in-law

A sudden heavy rain swept across the entire blue planet, as if there was no end.

Heavy rainfall caused the sea level to continue to rise, coastal cities were completely submerged, and some island nations even disappeared...

But no one knew that this flood was just the prelude to the disaster.

The various mutated fish in the sea began to become violent and extremely aggressive.

The rain seeped into the soil, causing drastic mutations in some of the life underground.

After eating fish, humans began to mutate.

Some people turned into monsters, while others became powerful.

People call it "evolution."

The entire social order quickly collapsed.

Xu Yan, with his "sister-in-law", began his journey of survival.

Fortunately, he has a system that can extract various supplies and the space that comes with the system.