Seo Young-sam High school teacher
Song Gwang-ja Landlady
Yeom Hye-ran염혜란 Jeon Gwang-rye / Chloe Lee Hye-ran, Jeon Gwang-rye
IU Oh Ae-sun / Yang Geum-myeong
Kang Myeong-ju강명주 Yoo Bu-young
Kang Jeong-woo강정우 Lee Hye-ran's father
Kang You-seok강유석 Yang Eun-myeong
Kim Guk-hee김국희 Professor
Kim Keum-soon김금순 Mi-hyang
Kim Sung-ryung김성령 Jung Mi-in
Kim Su-an김수안 Oh Jenny
Kim Jae-young김재영 Driver
Lee A-ra이아라 Yang Geum-myeong (older child)
Lee Bong-ryeon이봉련 Doctor
Lee Gyu-hoe이규회 Park Geum-myeong
Lee Jun-young이준영 Park Yeong-bum
Oh Jung-se오정세 Yeom Byeong-cheol
Uhm Ji-won엄지원 Na Min-ok
Park Hae-joon박해준 Yang Gwan-sik (middle-aged)
Park Ji-hong박지홍 Boat buyer
Song Yo-sep송요셉 Rice cake buyer
Hwang Jae-yeol황재열 Homeroom teacher
Heo Jin허진 Eul-nam
Jang Hye-jin장혜진 Park Young-ran