Kaseifu no Musume

A billionaire and the daughter of a housekeeper. How could our worlds be any more different? Eric was born into a rich family, and Sofia, the daughter of their housekeeper, loved him dearly. However, they haven't seen each other in fifteen years, ever since he was sent away to boarding school. Then Sofia unexpectedly appears for an interview at his real estate empire. Sofia is filled with beloved memories of the times they shared together. But will Eric, her first kiss, ever see her as more than a childhood friend? (Source: Harlequin, translated)