류덕환

Nam-woo (voice)

Gong Hyung-jin

Jun-ho (voice)

Ahn Sung-ki

Kyung-min (voice)

Bae Jong-ok

Nam-woo's Mother (voice)

나문희

Nam-woo's Grandmother (voice)

장항선

Jun-ho's Father (voice)

Lee Byung-hun

Adult Nam-woo (voice)

이석준

Office Colleague 1 (voice)

이나리

Sook-i (voice)