Surviving in the Stone Age? Is This Some Kind of Mistake?

(A Dr. Stone fanfic, original female protagonist + romance + science + conflict + survival + reincarnation + ensemble cast)

One day, humanity was turned to stone by a mysterious green light for thousands of years. Human civilization gradually disappeared, until a boy named Senku Ishigami awoke a millennium later. Using science, he would gather companions and strive to revive civilization and save all seven billion people…

Cangshan Jingwen suddenly learns that she comes from beyond this world. With no other choice, she must survive in this primitive, post-petrification world. How will she cling to the protagonists’ coattails, or perhaps find a way to save herself?

Youth has no price tag. You have to stay alive, no matter what!

If I’m alive, I’ve already succeeded. Die young, and you lose everything!

(The heroine is mixed-race. The early story follows the original plot, but it will diverge later. I’ll do my best to keep everyone in character.)

A cunning, devious psychological illusionist x a mysterious martial artist with a surprising side