Breathless

Kim Kkob-bi

Yeon-hee

Lee Hwan

Young-jae

Yang Ik-june

Sang-hoon

Park Jeong-soon

Seung-cheol

Lee Seung-yeon

Hyeon-seo

Kim Hee-soo

Hyung-in

Lee Jin-sook

Sang-hoon's Mother

Choi Yong-min

Hyeong-seok

Kil Hae-yeon

Yeon-hee's Mother

Kim Sang-won

Young Sang-hoon

Ji Seon-ae

Sang-hoon's Younger Sister / Jun-hee

Jeong Man-sik

Man-sik

Yoon Seung-hoon

Hwan-gyu

Oh Ji-hye

Yeon-hee's Homeroom Teacher

Hong Seung-il

Beat Up Man