Park Shin-hye
Choi In-ha (20 eps)
Lee Jong-suk
Choi Dal-po / Ki Ha-myung (20 eps)
Kim Young-kwang
Seo Bum-jo (20 eps)
Lee Yu-bi
Yoon Yoo-rae (20 eps)
Jin Kyung
Song Cha-ok (20 eps)
Lee Pil-mo
Hwang Gyo-dong (20 eps)
Min Sung-wook
Jang Hyun-kyu (20 eps)
Yoon Kyun-sang
Ki Jae-myung (20 eps)
Choo Soo-hyun
Im Jae-hwan (20 eps)
Byun Hee-bong
Choi Gong-pil (20 eps)
Shin Jung-keun
Choi Dal-pyung (20 eps)
Lee Ju-seung
Ahn Chan-soo (20 eps)
Jeong In-gi
Ki Ho-sang (20 eps)
Nam Da-reum
Young Ki Ha-myung (20 eps)
Shin Jae-ha
Young Ki Jae-myung (20 eps)
Kim Yeong-hoon
Lee Il-joo (20 eps)
Kang Shin-il
Lee Yeong-tak (20 eps)
Kim Kwang-kyu
Kim Gong-joo (20 eps)
Kim Hae-sook
Park Ro-sa (20 eps)
Roh Jeong-eui
Young Choi In-ha (20 eps)
Jang Young-nam
Ha-myung's Mother (20 eps)
Tae Hang-ho
Cha Woo-cheol (20 eps)
Yoon Seo-hyun
Lee Joo-ho (20 eps)
Jo Deok-hyeon
Jo Won-go (20 eps)
Woo Hyeon
Homeroom teacher (3 eps)
Jang Hang-jun
Director (2 eps)
Ahn Sun-Young
Broadcasting writer (2 eps)
Kim Young-jun
Neighbour with Pinocchio syndrome (2 eps)
Yum Dong-hun
Moon Deok Soo [Task leader] (1 eps)
Jang Gwang
Headmaster (1 eps)
Choi Jong-hoon
Factory worker (1 eps)
Jung Woong-in
Min Joon Kook (1 eps)
Lee Bo-young
Hye Sung [Voice navigation] (1 eps)
Kim Min-young
Song Yeong Joo [Daughter of the woman who died] (1 eps)
Ri Min
Drunk driver (1 eps)
Yoon Sang-hyun
Lawyer Cha Kwan Woo (1 eps)
Park Gil-su
Jo Jang Woo [Bus Company Owner] (1 eps)
No Tae-yeob
Attacker (1 eps)
Lee Joon
FAMA (1 eps)
Kangnam
University student in a blue jacket (1 eps)
Oh Seung-ah
[MSC news reporter interviewee] (1 eps)
Dowoo
MSC new Reporter interviewee (1 eps)