Apocalypse: The Strange Older Sister I Picked Up

[Apocalypse + survival + one soul, two bodies + mild yuri + max-level from the start] Not a do-gooder, has a cleanliness obsession, loves to slack off and cuddle. The apocalypse arrives without warning, and something strange massacres the city. Lin Xiaoman, a freshman college student who looks like a little girl, is hunted to an unfinished building, where she unexpectedly possesses the body of an SSS-rank strange female general. Her unconscious self is lying nearby: one soft, delicate real body, and one stunningly beautiful strange body. She doesn't want to save the world. She just wants to find food and survive with her other self, lazing around in peace. But she accidentally throws the apocalypse into turmoil. Beneath the calm, a new black hole is quietly expanding... (This novel is mainly about the protagonist lazing around and cuddling with herself during the apocalypse, so there are relatively few fight scenes.)