Kim Joo-hee

Oh Tae-soo

Oh Ah-yeong

Han So-jeong

Lee Jeong-ja

Han Yeong-min

Han Moon-gil

Kim Ye-bin

Lee Se-jin

Seo Yoo-min

Principal (Special appearance)

Lee Se-jin's mother

Ye-bin's mother

Ji-yeong

Young Han So-jeong

Hye-eun

Grandmother landlady

Young Oh Tae-soo

Young Oh Ah-yeong

Ah-yeong and Tae-soo's father

Teacher