Akuyaku Reijou no Kyouji ~Kon’yakusha wo Ubaitotte Gishi wo Oidashita Watashi wa, Douyara Ima kara Hametsu Suru You desu~

Raised from commoner to count's daughter, Wellmy Ernest ruthlessly seized her half-sister's inheritance, fiancé, and freedom—selling the gentle girl to the feared Lord of Magic. Now, with her cruelty complete, Wellmy realizes her victory came at a terrible price, and ruin is already closing in.