Điên Thì Có Sao

Park Gyu Young

Nam Joo Ri [Gang Tae's co-worker]

Jang Young Nam

Park Haeng Ja [OK Psychiatric Hospital's head nurse]

Kim Chang Wan

Oh Ji Wang [OK Psychiatric Hospital's director]

Kang Gi Doong

Jo Jae Soo [Gang Tae's friend]

Kim Joo Heon

Lee Sang In [Sangsangyisang Publishing Company's CEO]

Kim Mi Kyung

Kang Soon Deok [Joo Ri's mother]

Park Jin Joo

Yoo Seung Jae

Lee Eol

Go Dae Hwan [Moon Young's father]

Jang Gyu Ri

Seon Byul [OK Psychiatric Hospital nurse]

Kim Gi Cheon

Kan Pil Ong [Patient]

Jeong Jae Kwang

Joo Jung Tae [Patient]

Ji Hye Won

Lee Ah Reum [Patient]

Choi Woo Sung

Oh Cha Yong [OK Psychiatric Hospital caregiver]

Seo Joon

Kwon Min Seok [OK Psychiatric Hospital psychiatrist]

Ha Kyung Min

[OK Psychiatric Hospital's psychiatrist]

Kang Ji Eun

Park Ok Ran [Patient]

Joo In Young

Yoo Sun Hae [Patient]

Kim Soo In

Go Moon Young [Young]

Moon Woo Jin

Moon Gang Tae [Young]

Lee Kyu Sung

Moon Sang Tae [Young]

Choi Hee Jin

[Gang Tae and Sang Tae's mom]

Jung Ji Hyun

[Publishing House staff]

Cheon So Ra

[Publishing House staff]

Go Han Min

[Publishing House staff]

Yu Yeon Seok

[Publishing House staff]