Apocalyptic Cold: Reborn Fiancée Saves Childhood Sweetheart? I'm Going North for a Warm Winter!

I transmigrated to a frigid post-apocalyptic world, and my fiancée was a survivor who died in the apocalypse but was reborn. After her rebirth, she only told her childhood sweetheart about the apocalypse, but then asked me for money to stockpile supplies. I firmly refused: "Qingyan, why do you suddenly want so much money? I can't just give it to you!" My fiancée cried and begged me: "Achen, what do you want me to believe? I have a reason for doing all this!" I reached out and hugged her, saying affectionately: "Qingyan, I've always believed in you, but you've never seemed to believe in me." To be able to live happily ever after with my childhood sweetheart after the apocalypse...