Cinderella no Shutsuji

Alex promised a tycoon he would investigate whether his long-lost granddaughter, Rosie, is a worthy heir. When he met Rosie while undercover, he felt a tremulous excitement that he had never experienced before. While Alex tried to get closer to Rosie and take care of her, Rosie fell in love with him. Their relationship seemed to be going well, but then Rosie realized Alex's true motives. Shocked and devastated, she has to ask herself if her first love is over. (Source: Renta!)