Akdang Gamunui Sangsongnyeoimnida

Katisha Ainsley's adoptive grandfather dies and leaves her with a grieving heart... as well as an incredible fortune! Katisha's grandpa was actually the former Duke Blasco, the head of a villainous family. Fearing what the Blascos would do to get the inheritance, Katisha joins them to reverse the will. But as they work together, she begins to like the evil family, and they start finding her too cute to hate. Can Katisha safely return the Blascos' riches, or will she stay the villains' heiress?

(Source: Tapas)