I'm Sorry Kang Nam-Goo

Kim Min-seo

as

Jung Mo-ah

Park Sun-ho

as

Kang Nam-goo

Lee Na-kyung

as

Cha Young-hwa

Heo Young-ran

as

Im Soon-jung

Lee In

as

Park Do-hoon

Cha Hwa-yeon

as

Hong Myung-sook

Lee Chang-hoon

as

Shin Tae-jin

Kim Joo Ri

as

Shin Hee-joo

Jang Ga-hyun

as

Madam Oh

Lee Seung-Hyung

as

Gong Man-soo

Jo Yeon-woo

as

Gong Cheon-soo