Angnyeoinde Hapil Nampyeoni Jalsaenggyeotda

Newlywed life isn't so great for the heroine who wakes up as Lamaine, the villainess in the novel "The Blue Flower at the Duke's Estate." Although Lamaine's husband, Cedric, is handsome enough to make her nose bleed, he is unfortunately in love with the novel's female protagonist and despises Lamaine. But Cedric must stay married until he inherits the family title, and promises Lamaine a future divorce and hefty alimony in return for her cooperation. Meanwhile, Lamaine uses her skills as a doctor from her previous life to help people around the estate, blissfully unaware that Cedric's frigid attitude toward her is changing...
(Source: Tappytoon)