I Was Reborn as a Demonic Cultivator, So What's Wrong with Raising the Heroine?

[Ages 16+, two female leads, ensemble cast, immortal cultivation, slightly goofy and cheesy, female lead has no fixed top/bottom role]

Qian Yun is a student council president who loves making sarcastic remarks but seems aloof on the surface. After a cultivation romance novel falls on her and kills her, she transmigrates into the novel as a demonic cultivator with the same name. She scrapes by in the demonic sect, finds a girl with amnesia, and from then on embarks on a path of cultivation, chance encounters, and dual cultivation of both righteous and demonic arts... But why did nobody tell her she's the female lead?