[The end of the world + natural disaster + stocking up on supplies + two strong men + siblings]
The end of the natural disaster is coming, and human civilization is about to fall apart.
In this cruel apocalypse, the two supported each other and carved a new path of hope in this apocalypse.
Ps: The heroine is a normal female college student. Of course she will have feelings and soft-heartedness about some things. She will help if it is not so urgent. If she wants to kill so decisively and indiscriminately, I can't write it.
