Full Cast — Romance Is a Bonus Book (2019)

Lee Jong-suk

Cha Eun-ho

Lee Na-young

Kang Dan-yi

Eugene Jung

Song Hae-rin

Wi Ha-jun

Ji Seo-joon

Kim Tae-woo

Kim Jae-min

Kim Yu-mi

Ko Yoo-sun

Kim Sun-young

Seo Young-a

Cho Han-chul

Bong Ji-hong

Kang Ki-doong

Park Hoon

Park Gyu-young

Oh Ji-yool

Oh Eui-sik

Hong Dong-min

Lee Kwan-hun

Lee Seung-Jin

Choi Seung-yoon

Bae Kwang-soo

Lee Ji-won

Hong Jae-hee

Choi Da-in

Young Kang Dan-yi

Lee Ji-ha

Hae-rin's Mother

Lee Seo-hwan

Hae-rin's Father

Yi Chae-woon

Chae Song-yi

Choi Eun-kyeong

Ji Yul's mother

Kim Ji-hyun

Interviewer

Park Seoung-tae

Yoo Myung Sook [Novelist]

Lee Kyeong-uk

Ji Yul's mother's secretary

Song Yeong-jae

Nam Won Suk [Pureunmaeum Book Publishing president]

Ro Jong-hyun

Ji Yul's boyfriend

Hwang Se-on

Kim Na Kyung [Eun Ho's ex-girlfriend]