Kim Jung-hwa

Kim Joo-hee

Oh Min-suk

Oh Tae-soo

Gyeong Su-jin

Oh Ah-yeong

Jang Ji-Eun

Han So-jeong

Kim Hye-ok

Lee Jeong-ja

Ji Nam-hyuk

Han Yeong-min

Jung Bo-seok

Han Moon-gil

Joo Ah-reum

Kim Ye-bin

Jo Jung-eun

Lee Se-jin

Kim Bo-ra

Seo Yoo-min

Park Keun-hyong

Principal (Special appearance)

Yun Yoo-sun

Lee Se-jin's mother

Kim Na-woon

Ye-bin's mother

Cheon Young-min

Ji-yeong

Seo Ji-hee

Young Han So-jeong

Lee You-mi

Yeon Su-jin

Hye-eun

Hyun Sook-hee

Son Young-soon

Grandmother landlady

Kim Soo-hyeon

Won Duk-hyun

Young Oh Tae-soo

Yook Mi-ra

Yoon Jung-eun

Young Oh Ah-yeong

Choi Bum-ho

Ah-yeong and Tae-soo's father

Son Gun-woo

Teacher