- ??? - Shim Yeon-jung
- ??? - Choi Seok (Yi-hyeon's uncle)
- Lim Hyung-jun - Tae Soo
- ??? - Jong Tae (Gwangsook's husband)
- Kim Kap-soo - Choi Gook (Yi-hyeon's father)
- ??? - Choi Gi-tae (Seok's eldest son / Seon-young's husband)
- Kim Young-kwang - Park Soo-chang (Yi-hyeon's childhood friend)
- ??? - Go Eun-pyo
- Jin Hyuk - Choi Gi-joong (Gi-tae's younger brother)
- Kim Hye-jin - Lee Hye-young (Seon-young's elder sister)
- Son Jong-hak - Jeju Island Chief
- 고인범 - Executive Director Lee Joo-ho
- Kim Jung-soo - Senior Soo Chang
- Kim So-hyun - Jung Yi-hyeon (Young)
- Lee Hyang-sook - Lee Seon-young (Young)
성유리 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 interpreta a Gwangsook en la serie.
?? hace el papel de Lee Seon-young (Yi-hyeon's childhood friend / Gi-tae's wife).
Han Min interpreta a Park Soo-chang (Young) en la serie.
Jeong Seok-yong interpreta a Tae Man en la serie.
??? hace el papel de Shim Yeon-jung.
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