Kakure Saijo wa Zenzen Megenai: Gibo to Gimai ni Ie wo Oidasareta node Konyaku Haki shite Moraou to Omottara, Shinshi Datta Konyakusha ga Hageshiku Dekiai shite Kuru You ni Narimashita!?

Jeanette's evil stepmother has been tormenting her for years, making her into the laughingstock of high society. And when Jeanette's father suddenly disappears, the opportunistic woman casts her out of the house! Still, the eternal optimist Jeanette sees this as an opportunity for growth. Eager to start her life anew, she decides to call off her engagement to Count Claus Guivarch; rumor has it that the young man is being forced into this marriage to clear his family's debt, and Jeanette wants to set him free. But to her surprise, the gentleman has other plans—he refuses to break up, and even offers to help her reclaim her father's corporation. With the chances Claus gives her, Jeanette's business acumen quickly begins to shine. But what's behind Claus's unexpected affection...?

(Source: J-Novel Club)