Dark Lord, I've Already Read the Source Story

After dying of illness, orphan Seoha wakes up in the body of Ariella de Belfior Rosher, the hated villainess of the novel she was reading, who is doomed to a miserable end. Set on winning back the family the original Ariella alienated, she hides a dangerous secret: she can see spirits, beings this world believes are only legends. Her careful plans begin to unravel when Grand Duke Raheln of Cardien, the Demon Lord who killed Ariella in the original story, catches her with the spirits and grows fascinated by her.