Romance Is a Bonus Book

Lee Jong-suk

as

Cha Eun-ho

Lee Na-young

as

Kang Dan-yi

Jung Yoo-jin

as

Song Hae-rin

Wi Ha-jun

as

Ji Seo-joon

Kim Tae-woo

as

Kim Jae-min

Kim Yu-mi

as

Ko Yoo-sun

Kim Sun-young

as

Seo Young-a

Cho Han-cheul

as

Bong Ji-hong

Kang Ki-doong

as

Park Hoon

Park Gyu-young

as

Oh Ji-yool

Oh Eui-sik

as

Hong Dong-min

Lee Kwan-hun

as

Lee Seung-Jin

Choi Seung-yoon

as

Bae Kwang-soo

Lee Ji-won

as

Hong Jae-hee

Choi Da-in

as

Young Kang Dan...

Lee Ji-ha

as

Hae-rin's Moth...

Lee Seo-hwan

as

Hae-rin's Fath...

Lee Ha-eun

as

Chae Song-yi