Koushakuka wa Gikei ga Tsugebaii ~Ponkotsu Reijou no Akujo Keikaku~

“For my dear stepbrother… starting today, I’ll become a villainess!” Adele, the daughter of a ducal family, has long harbored a quiet affection for her stoic stepbrother, Edward. But just before her debut into high society, she learns a shocking truth: for Edward to inherit the dukedom, he must marr…