Doh Kyung Soo as Beom Shil
Kim So Hyun as Soo Ok
Yun Joon Suk as San Dol
David Lee as Gae Deok
Joo Ah Reum as Gil Ja
Park Yong Woo as Hyeong Joon / Beom Shil [Adult]
Park Hae Joon as Min Ho / San Dol [Adult]
Kim Ji Ho as Gil Ja [Adult]

Supporting Cast

Lee Dae Yeon as [Soo Ok’s father]
Kim Kwon as Young Il [Doctor]
Park Jeong Min as Yong Soo [Gae Deok’s brother]
Yoon Jung Ro as Novelist Park
Hwang Seok Jeong as [Gae Deok’s mother]