I Was Curious About You Ever Since We First Met

Namkoong Min

Ahn Dan-tae / Seok Jun-pyo

Bang Min-ah

Gong Shim

On Ju-wan

Seok Jun-su

Seo Hyo-rim

Gong Mi

Oh Hyun-kyung

Joo Jae-bun

Woo Hyeon

Gong Hyeok

Jung Hye-sun

Nam Sun-cheon

Kyeon Mi-ri

Yeom Tae-hui

Kim Il-woo

Seok Dae-hwang

Kim Byeong-ok

Yeom Tae-cheol

Bang Eun-hee

Chun Ji-yeon

Sunwoo Yong-nyeo

Dae-hwang's birth mother

Jo Yeon-ho

Seok Jun-pyo (Young)

Shin Soo-ho

Shin Gu-nam

Choi Hong-il

Ahn Su-young

Kim Byeong-se

Law firm president

Geum Bo

Ho Jung

Ahn Su-bin

Kim Dae-ri

Go Mi-young

Lawyer Choi

Lee Chae-kyung

Jun-pyo's birth mother