An Incompetent Woman Wants to Be a Villainess ~The Young Lady Who Married as a Substitute for Her Stepsister Didn't Notice the Duke's Doting~ Munou Saijo wa Akujo ni Naritai: Gimai no Migawari de Totsuida Reijou, Koushaku-sama no Dekiai ni Kizukanai

También conocida como: 無能才女は悪女になりたい ～義妹の身代わりで嫁いだ令嬢、公爵様の溺愛に気づかない～ · Munou Saijo wa Akujo ni Naritai: Gimai no Migawari de Totsuida Reijou, Koushaku-sama no Dekiai ni Kizukanai · An Incompetent Woman Wants to Be a Villainess ~The Daughter Who Married as a Substitute for Her Stepsister Didn't Notice the Duke's Doting~ · An Incompetent Woman Wants to Be a Villainess: The Young Lady Who Married as a Substitute for Her Half-Sister Didn't Notice the Duke's Doting · Munou Saijo wa Akujo ni Naritai - Gimai no Migawari de Totsuida Reijou, Koushaku-sama no Dekiai ni Kizukanai · The Woebegone Wonder Girl Wants to Be Wicked · 无能才女想成为恶女 · 無能才女は悪女になりたい　～義妹の身代わりで嫁いだ令嬢、公爵様の溺愛に気づかない～ · 무능 재녀는 악녀가 되고 싶다

Despite her hidden genius, Avril has lived a life of misery, constantly belittled as useless by her own family. When she is forced to substitute for her wicked step-sister in a marriage to a supposedly lecherous, old duke, Avril expects the worst. But surprisingly, Duke Dylan is actually a breathtakingly handsome young man. He offers her a deal: act as his villainess wife for three years, and then they will divorce. For Avril, this contract is a golden ticket to her ultimate freedom. But as she enthusiastically embraces her new evil persona, her mysterious charm leaves the duke and his household completely bewildered and entirely enchanted.