Transmigrated into a Book: In the Bitterly Cold Apocalypse, the Wicked Senior Sister Heats Things Up

I got sucked into a flop of an apocalypse novel and became the male underclassman, a simp and tool for the vicious senior girl. At minus 70 degrees, the idiot author stocked up on only 100 dumplings, a ton of charcoal, and a solar generator that's completely useless in an extreme-cold apocalypse! The System forces me to follow the plot: whatever the author writes, I have to do. According to the original story, the vicious senior girl is supposed to use me and dump me, then throw herself into the arms of a rich heir and humiliate me mercilessly. And my main quest is clearly supposed to be revenge on the vicious senior girl... But she's acting... really weird... System, could you explain something to me? What do you mean, the plot is the plot, and feelings are feelings? Forget it... See for yourselves!