Lee Na-young

as Zhen Chen's Mother

Jang Dong-yoon

as Zhen Chen

Oh Kwang-rok

as Zhen Chen's Father

Lee Yoo-jun

as Mr. Hwang

Seo Hyun-woo

as Mother's Boyfriend

Park Chang-hui

as Zhen Chen's Grandfather

Lee Jung-eun

as Bus Driver

Kim Deok-ju

as Zhen Chen's Grandmother