[Save-Load Device] [Natural Disasters] [Post-Apocalyptic Zombies] [No Romance] [Comeback] [Pocket Dimension] Slow-burn story!! The protagonist is genuinely weak at first! There are lots of scenes about everyday survival early on, so this isn't a typical power fantasy.
Shi Yue, who has just started her second year of high school, dies in a strange, inexplicable fog. When she wakes up again, she discovers that she has returned to the previous night and gained a save-load System.
Only after regaining her memories does she realize that this world has a chosen male lead, a domineering hero who becomes the fated one by harvesting the luck of his admirers. In the original story, she was the second female lead who gave him a pocket dimension! One of his harem members!
But the plot has gone off course, and there's now also a woman who has transmigrated into a book. She has taken Shi Yue's happy family, powerful pocket dimension, and heaven-defying luck, leaving Shi Yue to struggle through each day in a corrugated-metal shack that's cold in winter and hot in summer, constantly scrambling to make ends meet.
Having learned how the story is supposed to go, Shi Yue understands that her luck is destined to serve as a stepping stone for someone else, no matter what.
Luckily, she has the save-load device. Through all sorts of bizarre deaths, Shi Yue carves out a path for herself among the chosen ones!
Natural disasters and the apocalypse descend, pushing humanity's living space to the absolute limit. It's anyone's guess who will survive to the end!
[Content warning: This is not mindless wish fulfillment!! Please keep that in mind, everyone! The heroine starts out as an ordinary high school student. She won't become ruthless from the outset, but will grow over time. If that bothers you, please take note!]