Survival Manual for Homegirls in the Apocalypse

[Two heroines + apocalypse + super powers + hoarding supplies] When she woke up, the otaku Xu Yanxia traveled through time and became the heroine of a post-apocalyptic novel. The cute younger sister acts coquettishly towards her, the domineering cool elder sister brings her supplies, the gentle doctor takes care of her attentively, and the arrogant elder lady only treats her well. Wait, why was she tied up by the female supporting characters! Oops, why are all the female supporting characters turned black? (1V1 pure love, the heroine only likes one person)