A Secret Contract With the Demon Duke

“I swear I’ll free you from the chains of humanity.” Long ago, there existed a legend about twin sisters: a holy saint and a great villainess. In the present day, two sisters are born bearing the traits of that ancient tale. The younger sister, Aurelia, is worshipped as a saint by everyone around her. Meanwhile, the older sister Diana is feared and despised as the reincarnation of the infamous “Great Villainess,” suffering constant abuse from both her family and society. During a noble party, Diana is cornered by one of Aurelia’s schemes and placed in serious danger. At that moment, a mysterious and beautiful nobleman known as the “Duke of Lilburn” appears and rescues her. However, the duke is hiding a dangerous secret: he is not human at all, but a powerful demon. After encountering Diana, the demon duke becomes deeply interested in her, leading the two to enter a secret contract that slowly changes both of their fates. (Art Lapsa) https://www.cmoa.jp/title/334324/