Based on a Novel - female protagonist

Story: Reincarnation into a half-read chinese dynasty novel. Making the black-bellied male villain into a doting brother who harbours a desire for adoptive incest. A strong-willed, outrageous female lead.

Webnovel: 'The Yandere Came During the Night'.
Translation: completed and well done

https://www.foxaholic.com/novel/the-yandere-that-came-during-the-night/chapter-1-part-1/

Prefer: comic

Story: After the breaking of her engagement, this business oriented female lead makes strides to ensure she can still live a life of comfort that a noblewoman like her is used to. Naturally, this involves getting the demon king on her side.

Webnovel: 'Villainous Daughter Aims for the Last Boss'
Translation: nearly completed

https://www.novelupdates.com/series/villainous-daughter-aims-for-the-last-boss/

Prefer: comic

Story: Having lived this life before, the female lead sets out to establish connections and businesses that will support her and her mother. Slow burn romance, story focuses on female lead and plot.

Webnovel: 'Pampered Poisonous Royal Wife'
Translation: ongoing, over halfway

https://www.novelupdates.com/series/pampered-poisonous-royal-wife/

Prefer: webnovel