- ??? - Shim Yeonjeong
- ??? - Choi Seok (Yihyeon's uncle)
- Lim Hyung-jun - Tae Soo
- ??? - Jong Tae (Gwangsook's husband)
- Kim Kap-soo - Choi Gook (Yihyeon's father)
- ??? - Choi Gitae (Seok's eldest son / Seonyoung's husband)
- Kim Young-kwang - Park Soochang (Yihyeon's childhood friend)
- ??? - Go Eunpyo
- Jin Hyuk - Choi Gijoong (Gitae's younger brother)
- Kim Hye-jin - Lee Hyeyoung (Seonyoung's elder sister)
- Son Jong-hak - Jeju Island Chief
- Ko In-beom - Executive Director Lee Jooho
- Kim Jung-soo - Senior Soo Chang
- Kim So-hyun - Jeong Yihyeon (Young)
- Lee Hyang-sook - Lee Seonyoung (Young)
Sung Yu-ri hace el papel de Jung Yi-hyeon.
??? interpreta a Hong Hae-deum en la serie.
Yu Jun-sang interpreta a Hong Gyung-doo en la serie.
??? interpreta a Jung Joo-gyeom (Yi-hyeon's mother) en la serie.
Yoo Hye-ri interpreta a Mrs. Choi (Seok's wife) en la serie.
Park Eun-ji hace el papel de Gwangsook.
?? interpreta a Lee Seon-young (Yi-hyeon's childhood friend / Gi-tae's wife) en la serie.
Han Min hace el papel de Park Soo-chang (Young).
Jeong Seok-yong interpreta a Tae Man en la serie.
??? interpreta a Shim Yeon-jung en la serie.
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