The Witch's Darling Husband

Xie Xuxu was born a demon seed, evil by nature, with only the faintest trace of goodness in her heart, until Heaven punished her.

Fu Ye was born because of her and died for her. He saved her, then drove her to the brink of despair.

A narcissistic romance. Everyone is evil except the male lead and a few righteous characters.

Bad ending.