Become the King of the Mountain: I Have an Agreement with the Big Demon

This is an era where humans and demons coexist, and everything has animism. When your peaceful life is destroyed, order is destroyed, and humanity is challenged, what choice will you make? Cheng Shiyuan was just an ordinary person. She loved the big banyan tree in the courtyard the most. At night, she would sit under the tree and watch the stars while listening to Lao Cheng telling her stories. What a pity… Chaos abounds, and finally someone gets involved. [Modern background + historical fiction + imaginative setting + big heroine (most likely no cp and most single arrow, please mind if you enter by mistake)]