Kang Tae-oh

Park Hyun-joon's friend.

Lee Joon-ho; an employee in the litigation team at Hanbada

Lee Hyun-kyu

Lee Yeong-hwa

Oh Jung-tae (Seo-yeon's ex-boyfriend)

Prince Neungyang / Cha Yool-moo Jeon Jin-seo as young Prince Neungyang / Cha Yool-moo

Choe Hun

Kang Ho-young

Kim Jin-woo (27 years old), Soo-jeong's high school physical education teacher and Yoo-ri's childhood friend.

Lee Kyung-soo / Yoon Sang-ah Kim Gun-woo as young Lee Kyung-soo

Heo Dong-gu, elder son of Sam-shik

Young Woo-chul

Lee Jun-su / Jace: is the son of the innkeeper. He has an attractive appearance with dancing skills and a good voice. He is also an idol trainee at the most popular KM entertainment company in Korea. Junsu is competitive, arrogant, and playful while occasionally being sweet and lovesick at the same time. His life has been turned upside down since the first moment Thuy Linh appeared in his life. They later fall in love with each other. In part 2, Jun-su is hit by a truck when crossing the road and loses a part of his memory. He goes to the United States to treat his brain injury and meets Cynthia in a fight at a New York bar, referred to as Jace by Cynthia. He also stops his idol career and becomes an architect for a resort company in Da Nang.

Ma Ae-ri's son

Joo Won