Full cast of Romance Is a Bonus Book

Lee Jong-suk

Cha Eun-ho

16 episodes

Lee Na-young

Kang Dan-yi

16 episodes

Jung Yoo-jin

Song Hae-rin

16 episodes

Wi Ha-jun

Ji Seo-joon

16 episodes

Kim Tae-woo

Kim Jae-min

16 episodes

Kim Yu-mi

Ko Yoo-sun

16 episodes

Kim Sun-young

Seo Young-a

16 episodes

Cho Han-cheul

Bong Ji-hong

16 episodes

Kang Ki-doong

Park Hoon

16 episodes

Park Gyu-young

Oh Ji-yool

16 episodes

Oh Eui-sik

Hong Dong-min

16 episodes

Lee Kwan-hun

Lee Seung-Jin

16 episodes

Choi Seung-yoon

Bae Kwang-soo

16 episodes

Lee Ji-won

Hong Jae-hee

16 episodes

Choi Da-in

Young Kang Dan-yi

16 episodes

Lee Ji-ha

Hae-rin's Mother

16 episodes

Lee Seo-hwan

Hae-rin's Father

16 episodes

Lee Ha-eun

Chae Song-yi

16 episodes

Choi Eun-kyeong

Ji Yul's mother

5 episodes

Kim Ji-hyun

Interviewer

4 episodes

Park Seoung-tae

Yoo Myung Sook [Novelist]

3 episodes

Lee Kyeong-uk

Ji Yul's mother's secretary

3 episodes

Song Yeong-jae

Nam Won Suk [Pureunmaeum Book Publishing president]

3 episodes

Ro Jong-hyun

Ji Yul's boyfriend

2 episodes

Hwang Se-on

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

2 episodes

Cha Soon-bae

Drunk man

1 episode

Shin Hye-jeong

Eun Ho's ex-girlfriend

1 episode

Park Yu-rim

Eun Jung

1 episode

Kim Kang-hoon

Cha Eun Ho [Young]

1 episode

Lee Do-hyun

Mr. Park [Writer]

1 episode

Yoon In-Jo

Yoo Sun's friend

1 episode

Choi Ga-in

Yoo Sun's friend

1 episode

Kim Nan-joo

Yoo Sun's friend

1 episode

Choi Jung-hoon

Street Busker

1 episode

Kim Do-hyung

Street Busker

1 episode

Geum Bo

Blind date man

1 episode

Oh Kyung-joo

Kim Myung Soo [Blind date man]

1 episode