Reborn at the age of 17, Li Ruonan uses her knowledge of the future to become a self-made millionaire and escape her terrifying family.
But in her previous life, after two battles between humans and AI, human society was ultimately wiped out.
Looking at the balance on her bank card, Li Ruonan thinks it over again and again, then decides to shoulder the fate of saving the world.
So, using a piece of information she happened to obtain in her previous life, she goes to the side of Fang Nianzhang, who may one day become the great demon king who destroys the world.
She thinks she can stop the world's destruction by quietly changing him for the better.
But why does he end up helping her study hard and make progress every day instead?
Also, why has the righteous little hero from her previous life been reborn too, and why does she seem to be showing signs of turning evil and destroying the world in Fang Nianzhang's place?
P.S. The female lead is the focus.
When they're angry, both leads have a slight streak of madness.
The female lead is neither some lofty ideal nor a naive sweetheart.
Theme: This isn't really about saving each other. It's about two souls colliding.