Jun Ji-hyun
Sim Chung / Se-hwa (20 eps)
Lee Min-ho
Heo Joon-jae / Kim Moo (20 eps)
Lee Hee-jun
Jo Nam-doo (20 eps)
Shin Won-ho
Tae-oh (20 eps)
Lee Ji-hoon
Heo Chi-hyun (20 eps)
Hwang Shin-hye
Kang Seo-hee (20 eps)
Choi Jung-woo
Heo Gil-joong (20 eps)
Na Young-hee
Mo Yoo-ran (20 eps)
Shin Hye-sun
Cha Si-a (20 eps)
Moon So-ri
Ahn Jin-joo (20 eps)
Sung Dong-il
Ma Dae-young / Mr. Yang (20 eps)
Park Hae-soo
Hong Dong-pyo (20 eps)
Krystal Jung
Min-ji (20 eps)
Shin Eun-soo
Young Sim Chung (20 eps)
Kal So-won
Child Sim Chung (20 eps)
Jinyoung
Young Heo Joon-jae (20 eps)
Jeon Jin-seo
Child Heo Joon-jae (20 eps)
Cho Jung-seok
Yoo Jong-Hoon (2 eps)
Carson Allen
Mermaid (1 eps)
Go Gyu-pil
Han Seong-Tae (1 eps)