Mr. Goodbye (2006)

Yoon Hyun Suh (Ahn Jae Wook) is an adoptee who grows up in the United States. He becomes successful as a top manager of a hotel chain. He is assigned to do business in Korea. He falls in love with Choi Young In (Lee Bo Young), a sassy concierge from the hotel he is assigned to. There is trouble still looming because Kang Soo Jin (Oh Yoon Ah) who is Hyun Suh's best friend's ex-wife comes back with vengeance in mind. The three become entangled in this love triangle.