| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Im Meari | Crew | Writing | Writer, Creator | 16 |
 Kwon Young-il | Crew | Directing | Director | 16 |
 Lee Jae-eun | Cast | Actress | patient | 1 |
 Yoo Ha-bok | Cast | Actor | Joo Ik's father | 3 |
 Woo Hee-jin | Cast | Actress | Kang Soo-ja | 16 |
 Lee Hwang-eui | Cast | Actor | Random guy talking to Myul Mang about flowers | 1 |
 Park Bo-young | Cast | Actress | Tak Dong-kyung | 16 |
 Kim Ji-seok | Cast | Actor | Jo Dae-han | 2 |
 Kim Sang-wook | Cast | Actor | Teacher | 1 |
 Lee Seung-joon | Cast | Actor | Jung Seung-jun / Jeong Dang-myeong | 16 |
 Nam Da-reum | Cast | Actor | Park Young / Young Prince | 16 |
 Seo In-guk | Cast | Actor | Myul Mang / Kim Sa-ram | 16 |
 Kwon Soo-hyun | Cast | Actor | Dong Kyung's blind date | 1 |
 Lee Soo-hyuk | Cast | Actor | Cha Joo-ik | 16 |
 Shin Do-hyun | Cast | Actress | Na Ji-na | 16 |
 Han Ye-ri | Cast | Actress | patient | 2 |
 Choi Moon-kyoung | Cast | Actress | Hair stylist | 1 |
 Kang Tae-oh | Cast | Actor | Lee Hyun-gyu | 16 |
 Min Young | Cast | Actress | Doctor | 1 |
 Oh Yeon-ah | Cast | Actress | "Dalgona" | 4 |
 Cho Wan-ki | Cast | Actor | Murderer | 1 |
 Heo Jae-ho | Cast | Actor | "Jijo King" | 4 |
 Jung Ji-so | Cast | Actress | So Nyeo-shin | 16 |
 Son Woo-hyeon | Cast | Actor | "Siberia" | 1 |
 Shin Soo-Hyun | Cast | Actress | Nurse | 1 |
 Shin Mun-sung | Cast | Actor | Arsonist | 1 |
 Choi Kyo-sik | Cast | Actor | Dong Kyung's relative | 2 |
 Song Jin-woo | Cast | Actor | Park Chang-sin | 16 |
 Lee Young-hee | Cast | Actress | Student's grandmother | 1 |
 Park Seung-jun | Cast | Actor | Graduating student | 1 |
 Hong In | Cast | Actor | Stabbing suspect | 3 |
 Dawon | Cast | Actor | Tak Seon-kyung | 16 |
 Lee Ja-ryeong | Cast | Actress | Doomsday pamphlet woman | 2 |
 Yoon Bok-sung | Cast | Actor | Judge | 1 |
 Seon Ah Rin | Cast | Actress | Handbag customer | 1 |
 Lee Jae-eun | Cast | Actress | Patient | 3 |
 Kang Jung-yun | Cast | Actress | Hospital lobby woman | 1 |
 Daniel C. Kennedy | Cast | Actor | Kevin | 16 |
 Ryu Yeon-seok | Cast | Actor | Photographer | 1 |
 Park Jae-joon | Cast | Actor | Tak Seon-kyung [Young] | 3 |
 Park Sang-hyeon | Cast | Actress | Toshino Publishing staff | 1 |
 Kim Hyo Myung | Cast | Actor | Subway pervert | 1 |
 Jang Young-hyeon | Cast | Actor | Alumnus | 1 |
 Kim Baek-ri | Cast | Actress | Dae Han's wife | 2 |
 Park Tae-in | Cast | Actor | Park Jung-min | 16 |
 Eom Ok-ran | Cast | Actress | Dong Kyung's relative | 2 |
 Kim Ji-su | Cast | Actress | Nurse | 2 |
| Person | Type | Job | Role(s) | Episodes |
