| Name | Character | Episodes |
|---|---|---|
| Park Bo-young | Tak Dong-kyung | 16 |
| Seo In-guk | Myul Mang / Kim Sa-ram | 16 |
| Jung Ji-so | So Nyeo-shin | 16 |
| Daniel C. Kennedy | Kevin | 16 |
| Kang Tae-oh | Lee Hyun-gyu | 16 |
| Han Yeri | patient | 2 |
| Choi Moon-kyoung | Hair stylist | 1 |
| Jeon Ah-hee | Pregnant patient | 1 |