Park Bo-young
Tak Dong-kyung (16 eps)
Seo In-guk
Myul Mang / Kim Sa-ram (16 eps)
Lee Soo-hyuk
Cha Joo-ik (16 eps)
Kang Tae-oh
Lee Hyun-gyu (16 eps)
Shin Do-hyun
Na Ji-na (16 eps)
Dawon
Tak Seon Kyung (16 eps)
Woo Hee-jin
Kang Soo-ja (16 eps)
Jung Ji-so
So Nyeo-shin (16 eps)
Lee Seung-joon
Jung Seung-jun / Jeong Dang-myeong (16 eps)
Park Tae-in
Park Jung-min (16 eps)
Song Joo-hee
Jo Ye-ji (16 eps)
Choi So-yoon
Kim Da-in (16 eps)
Song Jin-woo
Park Chang-sin (16 eps)
Nam Da-reum
Park Young / Young Prince (16 eps)
Daniel C Kennedy
Kevin (16 eps)
Jeong Min-gyu
Kang Shin-jae (16 eps)
Lee Ye-seo
Tak Dong-kyung [Young] (5 eps)
Heo Jae-ho
"Jijo King" (4 eps)
Oh Yeon-ah
"Dalgona" (4 eps)
Hong In
Stabbing suspect (3 eps)
Park Jae-jun
Tak Seon-kyung [Young] (3 eps)
Yoo Ha-bok
Joo Ik's father (3 eps)
Lee Jae-Eun
Patient (3 eps)
Han Yeri
patient (2 eps)
Kim Ji-seok
Jo Dae-han (2 eps)
Kim Baek-ri
Dae Han's wife (2 eps)
Moon Chang-Wan
Tak Jong-won (2 eps)
Choi Kyo-sik
Dong Kyung's relative (2 eps)
Eom Ok-ran
Dong Kyung's relative (2 eps)
Kim Ji-su
Nurse (2 eps)
Lee Ja-ryeong
Doomsday pamphlet woman (2 eps)
Lee Young-joo
Dong Kyung's relative (2 eps)
Lee Jae-eun
patient (1 eps)
Kwon Soo-hyun
Dong Kyung's blind date (1 eps)
Shin Seo Hyun
Nurse (1 eps)
Lee Dong-kyu
YBN announcer (1 eps)
Kim Hyo Myung
Subway pervert (1 eps)
Ryu Yeon-seok
Photographer (1 eps)
Oh Nan-Ju
Shaman (1 eps)
Yoon Tae-Soo
Restaurant waiter (1 eps)
Son Woo-hyeon
"Siberia" (1 eps)
Min Young
Doctor (1 eps)
Yoon Bok-sung
Judge (1 eps)
Uhm Ja-yoon
Prison officer (1 eps)
Lim Yong-soon
Wedding celebration man (1 eps)
Yoo Sung-yeol
Alumnus (1 eps)
Jang Young-hyeon
Alumnus (1 eps)
Park Sang-hyeon
Toshino Publishing staff (1 eps)
Je Seung-hyun
Employee (1 eps)
Kim Sang-wook
Teacher (1 eps)
Park Bo-eun
Shoes saleswoman (1 eps)
Seon Ah Rin
Handbag customer (1 eps)
Park Seung-jun
Graduating student (1 eps)
Lee Young-hee
Student's grandmother (1 eps)
Lee Hwang-eui
Random guy talking to Myul Mang about flowers (1 eps)
Lee Si-Young
Medical receptionist (1 eps)
Shin Mun-sung
Arsonist (1 eps)
Cho Wan-ki
Murderer (1 eps)
Choi Moon-kyoung
Hair stylist (1 eps)
Jeon Ah-hee
Pregnant patient (1 eps)
Kang Jung-yun
Hospital lobby woman (1 eps)