Twenty

Kim Woo-bin

As Chi-ho

Lee Jun-ho

As Dong-woo

Kang Ha-neul

As Kyung-jae

Jung So-min

As So-min

Lee Yu-bi

As So-hee

Min Hyo-rin

As Jin-joo

Ahn Jae-hong

As In-gook

Heo Joon-seok

As Bum-soo

Jeon Yeo-jin

As Bum-soo's Wife

Park Myung-shin

As Chi-ho's Mother

Oh Hyun-kyung

As Dong-woo's Mother

Yoon Ga-hyun

As Grilled Clam Restaurant Owner

Kim Eui-sung

As Chi-ho's Father

Na In-woo

As Dong-won

Han Jun-woo

As Club DJ

Kim Chan-hyung

As Head of Loan Shark

Baek Soo-hee

As Min-jung

Park Hyuk-kwon

As Movie Director

Song Ye-dam

As Twin Brother

Song Ye-joon

As Twin Brother

Kim Jong-soo

As Dong-woo's Uncle

So Hee-jung

As Kyung-jae's Mother

Hong Wan-pyo

As Assistant Director

Yang Hyun-min

As So-jung

Kim Jae-man

As Chicken Restaurant Owner

Hwang Mi-young

As Woman bumps into Kyung-jae on Campus

Oh Ha-ni

As Makeup Team

Kang Chung-hun

As Dong-woo's Colleague

Jung Seo-in

As Hair Salon Staff