Park Shin-hye
Nam Ha-neul (16 eps)
Park Hyung-sik
Yeo Jung-woo (16 eps)
Yoon Park
Bin Dae-young (16 eps)
Kong Seong-ha
Lee Hong-ran (16 eps)
Park Won-ho
Moo-geun (16 eps)
Hyun Bong-sik
Gong Tae-seon (16 eps)
Jang Hye-jin
Gong Wol-sun (16 eps)
Yoon Sang-hyeon
Nam Ba-da (16 eps)
Song Ji-woo
Nurse Do Hye-ji (6 eps)
Lee Seung-joon
Psychiatrist (4 eps)
Park Won-sang
Nam Man-seok (4 eps)
Kim Jae-bum
Kang Jin-seok (2 eps)
Jang In-sub
Jeong-woo and Dae-yeong's friend (1 eps)
Oh Ryoong
Professor Kim (1 eps)
Lee Sung-kyoung
Han Woo-ri (1 eps)
Lee Joo-young
Jeong Woo's mother (1 eps)