Ending, Bakkwoboryeohamnida

Byun Soo-Ah, an impoverished novelist who only writes bad endings, is possessed by someone's curse as Choi Se-hwa, the villain of 'End of Youth', which is currently being serialized. Can Soo-Ah survive and return to her original world in a novel full of traitors, sociopaths, double personalities, and psychopaths?

(Source: Naver, translated)