Have I Come to Cry?

Tae Hyun, an orphan who grew up in South Korea after his father was killed in North Korea, forms a close bond with Yoon Sik. Tae Hyun falls in love with Yoon Sik's sister, Seong Sil, but they break up for his future. Yoon Sa Jang mentors Tae Hyun in business, and Tae Hyun eventually falls for Yoon Sa Jang's daughter, Ok Kyung. Seong Sil later reunites Tae Hyun with his long-lost mother at his wedding.