Cast from The Promise

Yeom Bok-sun

Hye-sook

Lee Jeong-kil

Min-woo

Im Ji-seong

Mi-yeong

Jang Je-hun

Jun

Do Kum-bong

Min-woo's mother

Heo Chang-kang

Mr. Kim

Ju Seon-tae

Mr. Park

Lee Jong-man

Dr. Shin

Lee Kyeong-hui

Jeon