Forgotten

강하늘

Jin-seok

Kim Mu-yeol

Yoo-seok / Choi Seong-uk

문성근

Jin-seok's Father / Mr. Park

나영희

Jin-seok's Father / Madam Min

남명렬

Professor Choi

이나라

Professor Choi's Wife

정택현

High School Yoo-seok

정찬비

Girl

Choi Go

Young Yoo-seok

배성일

Questionable Man 1

이순원

Questionable Man 2

변동준

Questionable Man 3

강신구

Jin-seok's Real Father / Precinct Policeman 4

안민영

Jin-seok's Real Mother

박재영

Jin-seok's Real Brother

박채익

Mover

권재환

Precinct Policeman 1

문성필

Precinct Policeman 2

엄인우

Precinct Policeman 3

김태응

Precinct Policeman 5