The Forgotten Ones

Park Bo-young

Tak Dong-kyung

Seo In-guk

Myul Mang / Kim Sa-ram

Lee Soo-hyuk

Cha Joo-ik

Kang Tae-oh

Lee Hyun-gyu

Shin Do-hyun

Na Ji-na

Dawon

Tak Seon-kyung

Woo Hee-jin

Kang Soo-ja

Jung Zi-so

So Nyeo-shin

Lee Seung-joon

Jung Seung-jun / Jeong Dang-myeong

Park Tae-in

Park Jung-min

Song Ju-hee

Jo Ye-ji

Choi So-yoon

Kim Da-in

Song Jin-woo

Park Chang-sin

Nam Da-reum

Park Young / Young Prince

Daniel C. Kennedy

Kevin

Lee Jae-eun

Patient

Oh Yeon-ah

"Dalgona"

Shin Mun-sung

Arsonist

Cho Wan-ki

Murderer