Cinderella wa Amai Kiss ni Aragaenai

Rin has lived a life of luxury as the daughter of Tojo Corporation. However, her father, the company president, is ousted! Rin loses everything overnight, and her childhood friend Reima, who she hadn't heard from in a while, proposes a "contract marriage." When Rin was young, Reima was kind and like a prince to her, but now he's grown up to be an extremely realistic young venture company president.