Going by the Book— Full Cast

Jung Jae-young

as Jeong Do-man

Son Byung-ho

as Lee Seung-woo

Shin Gu

as Do-man's Father

Lee Yong-i

as Do-man's Mother

Kim Kyu-chul

as Kim Seon-mae

Lee Young-eun

as Jeon Da-hye

Im Ji-eun

as Kim Sung-mi

Uhm Soo-jung

as Han So-young

Jang So-yeon

as Reporter

Ko Chang-seok

as Woo Jong-dae (uncredited)

Min Ji-hwan

as Unknown