- Park Seo-joon
- Hwang Ki-joon
- Kang Ha-neul
- Kang Hee-yeol
- Park Ha-seon
- Joo-hee
- Sung Dong-il
- Professor Yang
- Bae Yoo-ram
- Jae-ho
- Go Joon
- Goon-ho
- Lee Ho-jung
- Yoon-jeong
- Lee Ah-In
- Kidnapped girl
- Jo Hyun-im
- OB / GYN cleaning lady
- Han Jee-won
- Female student
- Kim Kyu-baek
- Young-Choon's gang member
- Eunbi Lee
- Bit part
- Nam Moon-cheol
- Gynecology director
- Lee Se-Hee
- Se-Hee
- Ahn Seong-bong
- Club security
- Cha Si-won
- Cadet at police academy
- Lee Woo-sung
- Police academy student
- Kwon Yoo-na
- Ye-jin's older sister
