Uhm Tae-woong

Lee Seung-min

Park Su-young

Mr. Koo

Go Joon-hee

Eun-chae

Cho Hyun-chul

Dong-goo (uncredited)

Kim Eui-sung

Professor Kang

Yoo Yeon-seok

Jae-wook

Cho Jung-seok

Nabddeuckyi

Bae Suzy

Yang Seo-yeon in the past

Lee Je-hoon

Lee Seung-min in the past

Han Ga-in

Yang Seo-yeon

Sin Ye-jin

Sing soon-gi