Boss no Propose: Eien wo Chikau Greece

Raised without a father, Bliss was a reject on the Greek island of Speros until the rich Alexei Drakos took her under his wing. Now nicknamed Billie, her friendship with him has continued for years, but stayed at that. Now in her twenties, Billie becomes Alexei's personal assistant, and she quickly discovers that part of her job is sending off Mr. Drakos's one-night flings. When a night of emotion ends with the two of them entwined, can Billie keep things professional, or is Alexei in for a pregnancy shock? (Source: MangaPlaza)