왓츠업

임주환

Jang Jae-Hun

Oh Man-seok

Sun Woo-Yeong

김지원

Park Tae-Yi

임주은

Oh Doo-Ri

조정석

Kim Byung-Gun

대성

Ha Do-Sung

장희진

Eun Chae-young

이수혁

Lee Soo-bin

안서현

Oh Doo-ri (young)

송옥숙

Jang Jae-heon's mother

김미경

Professor Yang Soo-jung

Song Ji-won

Director

Song Ji-na

Writer